Ssm 简单 crud 项目

Ssm简单 crud项目一. 工程搭建

1. 打开 intellij IDEA 创建工程,使用 maven的 webapp模板创建

指定 maven 位置和 mavenhome 的位置

点击 next,finish 后创建完成,点击右下角的 auto-import 自动导入依赖

2. 补全缺少的文件夹,在 main 下创建 java,resources,test 文件夹并指定为运行目录

3. 接下来指定 web 目录,打开 project structure,新建 web 目录

创建完成后再右侧右键点击 putintoroot

完成后看到 webapp 上面有一个蓝点说明配置完成

4. 在 pom.xml 文件中导入依赖(将原来的位置替换为下面的代码即可),注意更改半角全角

<properties>

<project.build.sourceEncoding>UTF-8</project.build

.sourceEncoding>

<maven.compiler.source>1.8</maven.compiler.source>

<maven.compiler.target>1.8</maven.compiler.target>



<srping.version>4.0.2.RELEASE</srping.version>

<mybatis.version>3.2.8</mybatis.version>

<slf4j.version>1.7.12</slf4j.version>

<log4j.version>1.2.17</log4j.version>

<druid.version>1.0.9</druid.version>

</properties>

<dependencies>

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>4.11</version>

</dependency>



<dependency>

<groupId>org.aspectj</groupId>

<artifactId>aspectjweaver</artifactId>

<version>1.6.8</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>${srping.version}</version>

</dependency>

<dependency>


<artifactId>spring-core</artifactId>


</dependency>

<dependency>


<artifactId>spring-oxm</artifactId>


</dependency>

<dependency>


<artifactId>spring-tx</artifactId>


</dependency>

<dependency>


<artifactId>spring-jdbc</artifactId>


</dependency>

<dependency>


<artifactId>spring-aop</artifactId>


</dependency>

<dependency>


<artifactId>spring-context</artifactId>


</dependency>

<dependency>


<artifactId>spring-context-support</artifactId>


</dependency>

<dependency>


<artifactId>spring-expression</artifactId>

</dependency>

<dependency>


<artifactId>spring-orm</artifactId>


</dependency>

<dependency>


<artifactId>spring-web</artifactId>


</dependency>

<dependency>


<artifactId>spring-webmvc</artifactId>


</dependency>





<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

<version>${mybatis.version}</version>

</dependency>

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>


</dependency>

<dependency>

<groupId>com.github.pagehelper</groupId>

<artifactId>pagehelper</artifactId>


</dependency>





<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>


</dependency>

<dependency>

<groupId>commons-dbcp</groupId>

<artifactId>commons-dbcp</artifactId>


</dependency>



<dependency>

<groupId>jstl</groupId>

<artifactId>jstl</artifactId>


</dependency>



<dependency>

<groupId>log4j</groupId>

<artifactId>log4j</artifactId>

<version>${log4j.version}</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-api</artifactId>

<version>${slf4j.version}</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-log4j12</artifactId>

<version>${slf4j.version}</version>

</dependency>



<dependency>

<groupId>com.alibaba</groupId>

<artifactId>druid</artifactId>

<version>${druid.version}</version>

</dependency>



<dependency>

<groupId>commons-fileupload</groupId>

<artifactId>commons-fileupload</artifactId>


</dependency>

<dependency>

<groupId>commons-io</groupId>

<artifactId>commons-io</artifactId>


</dependency>

<dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-databind</artifactId>


</dependency>

<dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-annotations</artifactId>


</dependency>

<dependency>

<groupId>org.ehcache</groupId>

<artifactId>ehcache</artifactId>


</dependency>

<dependency>

<groupId>org.mybatis.caches</groupId>

<artifactId>mybatis-ehcache</artifactId>


</dependency>

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>


<scope>provided</scope>

</dependency>

<dependency>

<groupId>org.projectlombok</groupId>

<artifactId>lombok</artifactId>


</dependency>

<dependency>

<groupId>javax.validation</groupId>

<artifactId>validation-api</artifactId>

<version>2.0.1.Final</version>

</dependency>

</dependencies>

二. SSM 配置文件配置

1. 创建 spring的配置文件 applicationContext.xml在 resources目录下

<?xml version="1.0" encoding="UTF-8"?>

<beans

xmlns="http://www.springframework.org/schema/beans

"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instan

ce"

xmlns:context="http://www.springframework.org/sche

ma/context"

xmlns:aop="http://www.springframework.org/schema/a

op"

xmlns:tx="http://www.springframework.org/schema/tx

"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring

-beans.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spri

ng-context.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-a

op.xsd

http://www.springframework.org/schema/tx

http://www.springframework.org/schema/tx/spring-tx

.xsd">

<context:component-scan base-package="com">

<context:exclude-filter type="annotation"

expression="org.springframework.stereotype.Control

ler"/>

</context:component-scan>

<context:property-placeholder

location="classpath:jdbc.properties"/>

<bean id="dataSource"

class="com.alibaba.druid.pool.DruidDataSource">

<property name="driverClassName"

value="${jdbc.driver}"/>

<property name="url" value="${jdbc.url}"/>

<property name="username"

value="${jdbc.username}"/>

<property name="password"

value="${jdbc.password}"/>

</bean>

<bean id="sqlSessionFactory"

class="org.mybatis.spring.SqlSessionFactoryBean">

<property name="dataSource"

ref="dataSource"/>

<property name="configLocation"

value="classpath:config.xml"/>

<property name="mapperLocations"

value="classpath:mapper/*.xml"/>

</bean>

<bean

class="org.mybatis.spring.mapper.MapperScannerConf

igurer">

<property name="basePackage"

value="com.dao"/>

</bean>

<bean

class="org.mybatis.spring.SqlSessionTemplate"

id="sessionTemplate">

<constructor-arg name="sqlSessionFactory"

ref="sqlSessionFactory"/>

<constructor-arg name="executorType"

value="BATCH"/>

</bean>

<bean id="transactionManager"

class="org.springframework.jdbc.datasource.DataSou

rceTransactionManager">

<property name="dataSource"

ref="dataSource"/>

</bean>

<tx:advice id="advice"

transaction-manager="transactionManager">

<tx:attributes>

<tx:method name="save*"

propagation="REQUIRED"/>

<tx:method name="update*"


<tx:method name="delete*"


<tx:method name="find*"

read-only="true"/>

<tx:method name="get*"

read-only="true"/>

<tx:method name="*"


</tx:attributes>

</tx:advice>

<aop:config>

<aop:pointcut id="pointcut"

expression="execution(*

com.service.impl.*.*(..))"/>

<aop:advisor advice-ref="advice"

pointcut-ref="pointcut"/>

</aop:config>

</beans>

2. 创建 springmvc配置文件 springmvc-servlet.xml


<beans

xmlns="http://www.springframework.org/schema/beans

"

xmlns:mvc="http://www.springframework.org/schema/m

vc"

xmlns:context="http://www.springframework.org/sche

ma/context"


ce"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring

-beans.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-m

vc.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spri

ng-context.xsd">

<context:component-scan base-package="com">

<context:include-filter type="annotation"

expression="org.springframework.stereotype.Control

ler"/>

</context:component-scan>

<bean id="internalResourceViewResolver"

class="org.springframework.web.servlet.view.Intern

alResourceViewResolver">

<property name="prefix" value="/WEB-INF/"/>

<property name="suffix" value=".jsp"/>

</bean>

<mvc:resources mapping="/css/**"

location="/WEB-INF/css/"/>

<mvc:resources mapping="/js/**"

location="/WEB-INF/js/"/>

<mvc:resources mapping="/fonts/**"

location="/WEB-INF/fonts/"/>

<mvc:annotation-driven/>

</beans>

3. 创建日志配置文件 log4j.properties

### set log levels ###

log4j.rootLogger = info , Console , D

#Console

log4j.appender.Console=org.apache.log4j.ConsoleApp

ender

log4j.appender.Console.layout=org.apache.log4j.Pat

ternLayout

log4j.appender.Console.layout.ConversionPattern=%d

[%t] %-5p [%c] - %m%n

log4j.logger.java.sql.ResultSet=INFO

log4j.logger.org.apache=INFO

log4j.logger.java.sql.Connection=INFO

log4j.logger.java.sql.Statement=INFO

log4j.logger.java.sql.PreparedStatement=INFO

#output2file

log4j.appender.D =

org.apache.log4j.DailyRollingFileAppender

log4j.appender.D.File = D\:/logs/log.log

log4j.appender.D.Append = true

##

\u8F93\u51FAinfo\u7EA7\u522B\u4EE5\u4E0A\u7684\u65

E5\u5FD7

log4j.appender.D.Threshold = INFO

log4j.appender.D.layout =

org.apache.log4j.PatternLayout

log4j.appender.D.layout.ConversionPattern

= %-d{yyyy-MM-dd HH\:mm\:ss} [ %t\:%r ] - [ %p ] %m%n

4. 创建 jdbc.properties 配置数据库

jdbc.driver=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql:///ssm?characterEncoding=utf8&

useSSL=false

jdbc.username=root

jdbc.password=32194878

initialSize=5

maxActive=20

maxIdle=20

minIdle=1

maxWait=10000

5. 在 resources下创建 config.xml文件用于配置mybatis扩展(这里使用了mybatis的分页插件)6. 在 resources 下创建 mapper 文件夹用于放置 mapper.xml 文件

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE

configuration

PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>

<settings>

<setting name="mapUnderscoreToCamelCase"

value="true"/>

</settings>

<plugins>

<plugin

interceptor="com.github.pagehelper.PageInterceptor

">

</plugin>

</plugins>

</configuration>

7. 配置完成后,在 applicationContext.xml 中没有最开始报红(*.xml 与 impl 还没创建)即可

8. 在 web.xml文件中加入 spring配置监听与启动,同时配置使用 utf编码,与支持 restful风格,没有报红说明配置正确


<web-app


ce"

xmlns="http://java.sun.com/xml/ns/javaee"

xsi:schemaLocation="http://java.sun.com/xml/ns/jav

aee

http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"

id="WebApp_ID" version="3.0">

<listener>

<listener-class>org.springframework.web.context.Co

ntextLoaderListener</listener-class>

</listener>

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:applicationContext.xml</par

am-value>

</context-param>

<servlet>

<servlet-name>dispatcherServlet</servlet-name>

<servlet-class>org.springframework.web.servlet.Dis

patcherServlet</servlet-class>

<init-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:springmvc-servlet.xml</para

m-value>

</init-param>

<load-on-startup>1</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>dispatcherServlet</servlet-name>

<url-pattern>/</url-pattern>

</servlet-mapping>

<filter>

<filter-name>encodingFilter</filter-name>

<filter-class>org.springframework.web.filter.Chara

cterEncodingFilter</filter-class>

<init-param>

<param-name>encoding</param-name>

<param-value>utf-8</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>encodingFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<filter>

<filter-name>hiddenHttpMethodFilter</filter-name>

<filter-class>org.springframework.web.filter.Hidde

nHttpMethodFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>hiddenHttpMethodFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

</web-app>

三. 数据库编写

1. 创建数据库 ssm,插入表 tbl-emp 与 tnl-dept(别问为啥 tnl,刚开始写的时候写错了后面都这

么用的就懒得改了 233)DROP TABLE IF EXISTS `tbl_emp`;CREATE TABLE `tbl_emp` (

`emp_id` int(11) NOT NULL AUTO_INCREMENT,`emp_name` varchar(255) NOT NULL,`gender` char(1) DEFAULT NULL,

`email` varchar(255) DEFAULT NULL,`d_id` int(11) DEFAULT NULL,PRIMARY KEY (`emp_id`),KEY `fk_emp_dept` (`d_id`),CONSTRAINT `fk_emp_dept` FOREIGN KEY (`d_id`) REFERENCES `tnl_dept` (`dept_id`)

) ENGINE=InnoDB AUTO_INCREMENT=1132 DEFAULT CHARSET=utf8;

DROP TABLE IF EXISTS `tnl_dept`;CREATE TABLE `tnl_dept` (

`dept_id` int(11) NOT NULL AUTO_INCREMENT,`dept_name` varchar(255) NOT NULL,PRIMARY KEY (`dept_id`)

) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

INSERT INTO `tnl_dept` VALUES ('1', '开发部');INSERT INTO `tnl_dept` VALUES ('2', '测试部');INSERT INTO `tnl_dept` VALUES ('3', '运营部');INSERT INTO `tnl_dept` VALUES ('4', '营销部');INSERT INTO `tnl_dept` VALUES ('5', '管理部');

四. Domain编写

1. Java包下创建如下目录

2. Domain包下创建实体类Department,DepartmentExample.Employee,EmployeeExample,具体

类方法的说明在下面

package com.domain;

public class Department {

private Integer deptId;

private String deptName;

public Integer getDeptId() {

return deptId;

}

public void setDeptId(Integer deptId) {

this.deptId = deptId;

}

public String getDeptName() {

return deptName;

}

public void setDeptName(String deptName) {

this.deptName = deptName == null ? null :

deptName.trim();

}

@Override

public String toString() {

return "Department{" +

"deptId=" + deptId +

", deptName='" + deptName + '\'' +

'}';

}

}

package com.domain;

import java.util.ArrayList;

import java.util.List;

public class DepartmentExample {

protected String orderByClause;

protected boolean distinct;

protected List<Criteria> oredCriteria;

public DepartmentExample() {

oredCriteria = new ArrayList<Criteria>();

}

public void setOrderByClause(String

orderByClause) {

this.orderByClause = orderByClause;

}

public String getOrderByClause() {

return orderByClause;

}

public void setDistinct(boolean distinct) {

this.distinct = distinct;

}

public boolean isDistinct() {

return distinct;

}

public List<Criteria> getOredCriteria() {

return oredCriteria;

}

public void or(Criteria criteria) {

oredCriteria.add(criteria);

}

public Criteria or() {

Criteria criteria =

createCriteriaInternal();


return criteria;

}

public Criteria createCriteria() {

Criteria criteria =


if (oredCriteria.size() == 0) {


}

return criteria;

}

protected Criteria createCriteriaInternal() {

Criteria criteria = new Criteria();

return criteria;

}

public void clear() {

oredCriteria.clear();

orderByClause = null;

distinct = false;

}

protected abstract static class

GeneratedCriteria {

protected List<Criterion> criteria;

protected GeneratedCriteria() {

super();

criteria = new ArrayList<Criterion>();

}

public boolean isValid() {

return criteria.size() > 0;

}

public List<Criterion> getAllCriteria() {

return criteria;

}

public List<Criterion> getCriteria() {

return criteria;

}

protected void addCriterion(String

condition) {

if (condition == null) {

throw new RuntimeException("Value for

condition cannot be null");

}

criteria.add(new Criterion(condition));

}


condition, Object value, String property) {

if (value == null) {


" + property + " cannot be null");

}

criteria.add(new Criterion(condition,

value));

}


condition, Object value1, Object value2, String

property) {

if (value1 == null || value2 == null) {

throw new RuntimeException("Between

values for " + property + " cannot be null");

}


value1, value2));

}

public Criteria andDeptIdIsNull() {

addCriterion("dept_id is null");

return (Criteria) this;

}

public Criteria andDeptIdIsNotNull() {

addCriterion("dept_id is not null");


}

public Criteria andDeptIdEqualTo(Integer

value) {

addCriterion("dept_id =", value,

"deptId");


}

public Criteria andDeptIdNotEqualTo(Integer

value) {

addCriterion("dept_id <>", value,

"deptId");


}

public Criteria andDeptIdGreaterThan(Integer

value) {

addCriterion("dept_id >", value,

"deptId");


}

public Criteria

andDeptIdGreaterThanOrEqualTo(Integer value) {

addCriterion("dept_id >=", value,

"deptId");


}

public Criteria andDeptIdLessThan(Integer

value) {

addCriterion("dept_id <", value,

"deptId");


}

public Criteria

andDeptIdLessThanOrEqualTo(Integer value) {

addCriterion("dept_id <=", value,

"deptId");


}

public Criteria andDeptIdIn(List<Integer>

values) {

addCriterion("dept_id in", values,

"deptId");


}

public Criteria andDeptIdNotIn(List<Integer>

values) {

addCriterion("dept_id not in", values,

"deptId");


}

public Criteria andDeptIdBetween(Integer

value1, Integer value2) {

addCriterion("dept_id between", value1,

value2, "deptId");


}

public Criteria andDeptIdNotBetween(Integer


addCriterion("dept_id not between",

value1, value2, "deptId");


}

public Criteria andDeptNameIsNull() {

addCriterion("dept_name is null");


}

public Criteria andDeptNameIsNotNull() {

addCriterion("dept_name is not null");


}

public Criteria andDeptNameEqualTo(String

value) {

addCriterion("dept_name =", value,

"deptName");


}

public Criteria andDeptNameNotEqualTo(String

value) {

addCriterion("dept_name <>", value,

"deptName");


}

public Criteria

andDeptNameGreaterThan(String value) {

addCriterion("dept_name >", value,

"deptName");


}

public Criteria

andDeptNameGreaterThanOrEqualTo(String value) {

addCriterion("dept_name >=", value,

"deptName");


}

public Criteria andDeptNameLessThan(String

value) {

addCriterion("dept_name <", value,

"deptName");


}

public Criteria

andDeptNameLessThanOrEqualTo(String value) {

addCriterion("dept_name <=", value,

"deptName");


}

public Criteria andDeptNameLike(String

value) {

addCriterion("dept_name like", value,

"deptName");


}

public Criteria andDeptNameNotLike(String

value) {

addCriterion("dept_name not like", value,

"deptName");


}

public Criteria andDeptNameIn(List<String>

values) {

addCriterion("dept_name in", values,

"deptName");


}

public Criteria

andDeptNameNotIn(List<String> values) {

addCriterion("dept_name not in", values,

"deptName");


}

public Criteria andDeptNameBetween(String

value1, String value2) {

addCriterion("dept_name between",

value1, value2, "deptName");


}

public Criteria andDeptNameNotBetween(String


addCriterion("dept_name not between",

value1, value2, "deptName");


}

}

public static class Criteria extends

GeneratedCriteria {

protected Criteria() {

super();

}

}

public static class Criterion {

private String condition;

private Object value;

private Object secondValue;

private boolean noValue;

private boolean singleValue;

private boolean betweenValue;

private boolean listValue;

private String typeHandler;

public String getCondition() {

return condition;

}

public Object getValue() {

return value;

}

public Object getSecondValue() {

return secondValue;

}

public boolean isNoValue() {

return noValue;

}

public boolean isSingleValue() {

return singleValue;

}

public boolean isBetweenValue() {

return betweenValue;

}

public boolean isListValue() {

return listValue;

}

public String getTypeHandler() {

return typeHandler;

}

protected Criterion(String condition) {

super();

this.condition = condition;

this.typeHandler = null;

this.noValue = true;

}

protected Criterion(String condition, Object

value, String typeHandler) {

super();


this.value = value;

this.typeHandler = typeHandler;

if (value instanceof List<?>) {

this.listValue = true;

} else {

this.singleValue = true;

}

}


value) {

this(condition, value, null);

}


value, Object secondValue, String typeHandler) {

super();


this.value = value;

this.secondValue = secondValue;


this.betweenValue = true;

}


value, Object secondValue) {

this(condition, value, secondValue,

null);

}

}

}

package com.domain;

import javax.validation.constraints.Email;

import javax.validation.constraints.Pattern;

public class Employee {

private Integer empId;

@Pattern(regexp =

"(^[a-zA-Z0-9]{6,16}$)|(^[\\u2E80-\\u9FFF]{2,6}$)"

,message = "用户名是 2-5位中文或 6-16位英文")

private String empName;

private String gender;

@Email

private String email;

private Integer dId;

private Department department;

public Department getDepartment() {

return department;

}

public void setDepartment(Department department)

{

this.department = department;

}

public Integer getEmpId() {

return empId;

}

public void setEmpId(Integer empId) {

this.empId = empId;

}

public String getEmpName() {

return empName;

}

public void setEmpName(String empName) {

this.empName = empName == null ? null :

empName.trim();

}

public String getGender() {

return gender;

}

public void setGender(String gender) {

this.gender = gender == null ? null :

gender.trim();

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email == null ? null :

email.trim();

}

public Integer getdId() {

return dId;

}

public void setdId(Integer dId) {

this.dId = dId;

}

@Override

public String toString() {

return "Employee{" +

"empId=" + empId +

", empName='" + empName + '\'' +

", gender='" + gender + '\'' +

", email='" + email + '\'' +

", dId=" + dId +

", department=" + department +

'}';

}

}

package com.domain;

import java.util.ArrayList;


public class EmployeeExample {

protected String orderByClause;

protected boolean distinct;

protected List<Criteria> oredCriteria;

public EmployeeExample() {

oredCriteria = new ArrayList<Criteria>();

}

public void setOrderByClause(String

orderByClause) {

this.orderByClause = orderByClause;

}

public String getOrderByClause() {

return orderByClause;

}

public void setDistinct(boolean distinct) {

this.distinct = distinct;

}

public boolean isDistinct() {

return distinct;

}

public List<Criteria> getOredCriteria() {

return oredCriteria;

}

public void or(Criteria criteria) {


}

public Criteria or() {

Criteria criteria =



return criteria;

}

public Criteria createCriteria() {

Criteria criteria =


if (oredCriteria.size() == 0) {


}

return criteria;

}

protected Criteria createCriteriaInternal() {

Criteria criteria = new Criteria();

return criteria;

}

public void clear() {

oredCriteria.clear();

orderByClause = null;

distinct = false;

}

protected abstract static class

GeneratedCriteria {

protected List<Criterion> criteria;

protected GeneratedCriteria() {

super();

criteria = new ArrayList<Criterion>();

}

public boolean isValid() {

return criteria.size() > 0;

}

public List<Criterion> getAllCriteria() {

return criteria;

}

public List<Criterion> getCriteria() {

return criteria;

}


condition) {

if (condition == null) {


condition cannot be null");

}

criteria.add(new Criterion(condition));

}


condition, Object value, String property) {

if (value == null) {


" + property + " cannot be null");

}


value));

}


condition, Object value1, Object value2, String

property) {

if (value1 == null || value2 == null) {

throw new RuntimeException("Between

values for " + property + " cannot be null");

}


value1, value2));

}

public Criteria andEmpIdIsNull() {

addCriterion("emp_id is null");


}

public Criteria andEmpIdIsNotNull() {

addCriterion("emp_id is not null");


}

public Criteria andEmpIdEqualTo(Integer

value) {

addCriterion("emp_id =", value, "empId");


}

public Criteria andEmpIdNotEqualTo(Integer

value) {

addCriterion("emp_id <>", value,

"empId");


}

public Criteria andEmpIdGreaterThan(Integer

value) {

addCriterion("emp_id >", value, "empId");


}

public Criteria

andEmpIdGreaterThanOrEqualTo(Integer value) {

addCriterion("emp_id >=", value,

"empId");


}

public Criteria andEmpIdLessThan(Integer

value) {

addCriterion("emp_id <", value, "empId");


}

public Criteria

andEmpIdLessThanOrEqualTo(Integer value) {

addCriterion("emp_id <=", value,

"empId");


}

public Criteria andEmpIdIn(List<Integer>

values) {

addCriterion("emp_id in", values,

"empId");


}

public Criteria andEmpIdNotIn(List<Integer>

values) {

addCriterion("emp_id not in", values,

"empId");


}

public Criteria andEmpIdBetween(Integer


addCriterion("emp_id between", value1,

value2, "empId");


}

public Criteria andEmpIdNotBetween(Integer


addCriterion("emp_id not between",

value1, value2, "empId");


}

public Criteria andEmpNameIsNull() {

addCriterion("emp_name is null");


}

public Criteria andEmpNameIsNotNull() {

addCriterion("emp_name is not null");


}

public Criteria andEmpNameEqualTo(String

value) {

addCriterion("emp_name =", value,

"empName");


}

public Criteria andEmpNameNotEqualTo(String

value) {

addCriterion("emp_name <>", value,

"empName");


}

public Criteria andEmpNameGreaterThan(String

value) {

addCriterion("emp_name >", value,

"empName");


}

public Criteria

andEmpNameGreaterThanOrEqualTo(String value) {

addCriterion("emp_name >=", value,

"empName");


}

public Criteria andEmpNameLessThan(String

value) {

addCriterion("emp_name <", value,

"empName");


}

public Criteria

andEmpNameLessThanOrEqualTo(String value) {

addCriterion("emp_name <=", value,

"empName");


}

public Criteria andEmpNameLike(String value)

{

addCriterion("emp_name like", value,

"empName");


}

public Criteria andEmpNameNotLike(String

value) {

addCriterion("emp_name not like", value,

"empName");


}

public Criteria andEmpNameIn(List<String>

values) {

addCriterion("emp_name in", values,

"empName");


}

public Criteria andEmpNameNotIn(List<String>

values) {

addCriterion("emp_name not in", values,

"empName");


}

public Criteria andEmpNameBetween(String


addCriterion("emp_name between", value1,

value2, "empName");


}

public Criteria andEmpNameNotBetween(String


addCriterion("emp_name not between",

value1, value2, "empName");


}

public Criteria andGenderIsNull() {

addCriterion("gender is null");


}

public Criteria andGenderIsNotNull() {

addCriterion("gender is not null");


}

public Criteria andGenderEqualTo(String

value) {

addCriterion("gender =", value,

"gender");


}

public Criteria andGenderNotEqualTo(String

value) {

addCriterion("gender <>", value,

"gender");


}

public Criteria andGenderGreaterThan(String

value) {

addCriterion("gender >", value,

"gender");


}

public Criteria

andGenderGreaterThanOrEqualTo(String value) {

addCriterion("gender >=", value,

"gender");


}

public Criteria andGenderLessThan(String

value) {

addCriterion("gender <", value,

"gender");


}

public Criteria

andGenderLessThanOrEqualTo(String value) {

addCriterion("gender <=", value,

"gender");


}

public Criteria andGenderLike(String value) {

addCriterion("gender like", value,

"gender");


}

public Criteria andGenderNotLike(String

value) {

addCriterion("gender not like", value,

"gender");


}

public Criteria andGenderIn(List<String>

values) {

addCriterion("gender in", values,

"gender");


}

public Criteria andGenderNotIn(List<String>

values) {

addCriterion("gender not in", values,

"gender");


}

public Criteria andGenderBetween(String


addCriterion("gender between", value1,

value2, "gender");


}

public Criteria andGenderNotBetween(String


addCriterion("gender not between",

value1, value2, "gender");


}

public Criteria andEmailIsNull() {

addCriterion("email is null");


}

public Criteria andEmailIsNotNull() {

addCriterion("email is not null");


}

public Criteria andEmailEqualTo(String

value) {

addCriterion("email =", value, "email");


}

public Criteria andEmailNotEqualTo(String

value) {

addCriterion("email <>", value, "email");


}

public Criteria andEmailGreaterThan(String

value) {

addCriterion("email >", value, "email");


}

public Criteria

andEmailGreaterThanOrEqualTo(String value) {

addCriterion("email >=", value, "email");


}

public Criteria andEmailLessThan(String

value) {

addCriterion("email <", value, "email");


}

public Criteria

andEmailLessThanOrEqualTo(String value) {

addCriterion("email <=", value, "email");


}

public Criteria andEmailLike(String value) {

addCriterion("email like", value,

"email");


}

public Criteria andEmailNotLike(String

value) {

addCriterion("email not like", value,

"email");


}

public Criteria andEmailIn(List<String>

values) {

addCriterion("email in", values,

"email");


}

public Criteria andEmailNotIn(List<String>

values) {

addCriterion("email not in", values,

"email");


}

public Criteria andEmailBetween(String


addCriterion("email between", value1,

value2, "email");


}

public Criteria andEmailNotBetween(String


addCriterion("email not between", value1,

value2, "email");


}

public Criteria andDIdIsNull() {

addCriterion("d_id is null");


}

public Criteria andDIdIsNotNull() {

addCriterion("d_id is not null");


}

public Criteria andDIdEqualTo(Integer value)

{

addCriterion("d_id =", value, "dId");


}

public Criteria andDIdNotEqualTo(Integer

value) {

addCriterion("d_id <>", value, "dId");


}

public Criteria andDIdGreaterThan(Integer

value) {

addCriterion("d_id >", value, "dId");


}

public Criteria

andDIdGreaterThanOrEqualTo(Integer value) {

addCriterion("d_id >=", value, "dId");


}

public Criteria andDIdLessThan(Integer

value) {

addCriterion("d_id <", value, "dId");


}

public Criteria

andDIdLessThanOrEqualTo(Integer value) {

addCriterion("d_id <=", value, "dId");


}

public Criteria andDIdIn(List<Integer>

values) {

addCriterion("d_id in", values, "dId");


}

public Criteria andDIdNotIn(List<Integer>

values) {

addCriterion("d_id not in", values,

"dId");


}

public Criteria andDIdBetween(Integer


addCriterion("d_id between", value1,

value2, "dId");


}

public Criteria andDIdNotBetween(Integer


addCriterion("d_id not between", value1,

value2, "dId");


}

}

public static class Criteria extends

GeneratedCriteria {

protected Criteria() {

super();

}

}

public static class Criterion {

private String condition;

private Object value;

private Object secondValue;

private boolean noValue;

private boolean singleValue;

private boolean betweenValue;

private boolean listValue;

private String typeHandler;

public String getCondition() {

return condition;

}

public Object getValue() {

return value;

}

public Object getSecondValue() {

return secondValue;

}

public boolean isNoValue() {

return noValue;

}

public boolean isSingleValue() {

return singleValue;

}

public boolean isBetweenValue() {

return betweenValue;

}

public boolean isListValue() {

return listValue;

}

public String getTypeHandler() {

return typeHandler;

}

protected Criterion(String condition) {

super();


this.typeHandler = null;

this.noValue = true;

}


value, String typeHandler) {

super();


this.value = value;


if (value instanceof List<?>) {

this.listValue = true;

} else {

this.singleValue = true;

}

}


value) {

this(condition, value, null);

}


value, Object secondValue, String typeHandler) {

super();


this.value = value;

this.secondValue = secondValue;


this.betweenValue = true;

}


value, Object secondValue) {

this(condition, value, secondValue,

null);

}

}

}

五. Mapper层编写

3. 在 dao 包下创建 DepartmentMapper,与 EmployeeMapper 接口

package com.dao;

import com.domain.Department;

import com.domain.DepartmentExample;


import org.apache.ibatis.annotations.Param;

public interface DepartmentMapper {

int countByExample(DepartmentExample example);

int deleteByExample(DepartmentExample example);

int deleteByPrimaryKey(Integer deptId);

int insert(Department record);

int insertSelective(Department record);

List<Department>

selectByExample(DepartmentExample example);

Department selectByPrimaryKey(Integer deptId);

int updateByExampleSelective(@Param("record")

Department record, @Param("example")

DepartmentExample example);

int updateByExample(@Param("record") Department

record, @Param("example") DepartmentExample

example);

int updateByPrimaryKeySelective(Department

record);

int updateByPrimaryKey(Department record);

}

package com.dao;

import com.domain.Employee;

import com.domain.EmployeeExample;


import org.apache.ibatis.annotations.Param;

public interface EmployeeMapper {

int countByExample(EmployeeExample example);

int deleteByExample(EmployeeExample example);

int deleteByPrimaryKey(Integer empId);

int insert(Employee record);

int insertSelective(Employee record);

List<Employee> selectByExample(EmployeeExample

example);

List<Employee>

selectByExampleWithDept(EmployeeExample example);

Employee selectByPrimaryKeyWidthDept(Integer

empId);

Employee selectByPrimaryKey(Integer empId);

int updateByExampleSelective(@Param("record")

Employee record, @Param("example") EmployeeExample

example);

int updateByExample(@Param("record") Employee

record, @Param("example") EmployeeExample example);

int updateByPrimaryKeySelective(Employee

record);

int updateByPrimaryKey(Employee record);

}

2. 在 resources 的 mapper 下创建对应 mapper.xml 文件 DepartmentMapper.xml 与EmployeeMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper

3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<mapper namespace="com.dao.DepartmentMapper" >

<resultMap id="BaseResultMap"

type="com.domain.Department" >

<id column="dept_id" property="deptId"

jdbcType="INTEGER" />

<result column="dept_name" property="deptName"

jdbcType="VARCHAR" />

</resultMap>

<sql id="Example_Where_Clause" >

<where >

<foreach collection="oredCriteria"

item="criteria" separator="or" >

<if test="criteria.valid" >

<trim prefix="(" suffix=")"

prefixOverrides="and" >

<foreach collection="criteria.criteria"

item="criterion" >

<choose >

<when test="criterion.noValue" >

and ${criterion.condition}

</when>

<when test="criterion.singleValue" >


#{criterion.value}

</when>

<when

test="criterion.betweenValue" >


#{criterion.value} and #{criterion.secondValue}

</when>

<when test="criterion.listValue" >


<foreach

collection="criterion.value" item="listItem"

open="(" close=")" separator="," >

#{listItem}

</foreach>

</when>

</choose>

</foreach>

</trim>

</if>

</foreach>

</where>

</sql>

<sql id="Update_By_Example_Where_Clause" >

<where >

<foreach collection="example.oredCriteria"






item="criterion" >

<choose >



</when>



#{criterion.value}

</when>

<when




</when>



<foreach



#{listItem}

</foreach>

</when>

</choose>

</foreach>

</trim>

</if>

</foreach>

</where>

</sql>

<sql id="Base_Column_List" >

dept_id, dept_name

</sql>

<select id="selectByExample"

resultMap="BaseResultMap"

parameterType="com.domain.DepartmentExample" >

select

<if test="distinct" >

distinct

</if>

<include refid="Base_Column_List" />

from tnl_dept

<if test="_parameter != null" >

<include refid="Example_Where_Clause" />

</if>

<if test="orderByClause != null" >

order by ${orderByClause}

</if>

</select>

<select id="selectByPrimaryKey"


parameterType="java.lang.Integer" >

select


from tnl_dept

where dept_id = #{deptId,jdbcType=INTEGER}

</select>

<delete id="deleteByPrimaryKey"


delete from tnl_dept


</delete>

<delete id="deleteByExample"

parameterType="com.domain.DepartmentExample" >

delete from tnl_dept



</if>

</delete>

<insert id="insert"

parameterType="com.domain.Department" >

insert into tnl_dept (dept_id, dept_name)

values (#{deptId,jdbcType=INTEGER},

#{deptName,jdbcType=VARCHAR})

</insert>

<insert id="insertSelective"


insert into tnl_dept


suffixOverrides="," >

<if test="deptId != null" >

dept_id,

</if>

<if test="deptName != null" >

dept_name,

</if>

</trim>

<trim prefix="values (" suffix=")"


<if test="deptId != null" >

#{deptId,jdbcType=INTEGER},

</if>


#{deptName,jdbcType=VARCHAR},

</if>

</trim>

</insert>

<select id="countByExample"

parameterType="com.domain.DepartmentExample"

resultType="java.lang.Integer" >

select count(*) from tnl_dept



</if>

</select>

<update id="updateByExampleSelective"

parameterType="map" >

update tnl_dept

<set >

<if test="record.deptId != null" >

dept_id = #{record.deptId,jdbcType=INTEGER},

</if>

<if test="record.deptName != null" >

dept_name =

#{record.deptName,jdbcType=VARCHAR},

</if>

</set>


<include

refid="Update_By_Example_Where_Clause" />

</if>

</update>

<update id="updateByExample" parameterType="map" >

update tnl_dept

set dept_id = #{record.deptId,jdbcType=INTEGER},

dept_name =

#{record.deptName,jdbcType=VARCHAR}


<include


</if>

</update>

<update id="updateByPrimaryKeySelective"


update tnl_dept

<set >


dept_name = #{deptName,jdbcType=VARCHAR},

</if>

</set>


</update>

<update id="updateByPrimaryKey"


update tnl_dept

set dept_name = #{deptName,jdbcType=VARCHAR}


</update>

</mapper>

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper

3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

<mapper namespace="com.dao.EmployeeMapper" >

<resultMap id="BaseResultMap"

type="com.domain.Employee" >

<id column="emp_id" property="empId"


#{criterion.value}

</when>

<when




</when>



<foreach



#{listItem}

</foreach>

</when>

</choose>

</foreach>

</trim>

</if>

</foreach>

</where>

</sql>

<sql id="Update_By_Example_Where_Clause" >

<where >

<foreach collection="example.oredCriteria"






item="criterion" >

<choose >



</when>



#{criterion.value}

</when>

<when




</when>



<foreach



#{listItem}

</foreach>

</when>

</choose>

</foreach>

</trim>

</if>

</foreach>

</where>

</sql>

<sql id="Base_Column_List" >

emp_id, emp_name, gender, email, d_id

</sql>

<sql id="WithDept_Column_List">

e.emp_id,e.emp_name,e.gender,e.email,e.d_id,d.dept

_id,d.dept_name

</sql>

<select id="selectByExample"


parameterType="com.domain.EmployeeExample" >

select


distinct

</if>


from tbl_emp



</if>



</if>

</select>

<select id="selectByPrimaryKey"



select


from tbl_emp

where emp_id = #{empId,jdbcType=INTEGER}

</select>

<delete id="deleteByPrimaryKey"


delete from tbl_emp


</delete>

<delete id="deleteByExample"

parameterType="com.domain.EmployeeExample" >

delete from tbl_emp



</if>

</delete>

<insert id="insert"

parameterType="com.domain.Employee" >

insert into tbl_emp (emp_id, emp_name, gender,

email, d_id)

values (#{empId,jdbcType=INTEGER},

#{empName,jdbcType=VARCHAR},

#{gender,jdbcType=CHAR},

#{email,jdbcType=VARCHAR},

#{dId,jdbcType=INTEGER})

</insert>

<insert id="insertSelective"


insert into tbl_emp



<if test="empId != null" >

emp_id,

</if>

<if test="empName != null" >

emp_name,

</if>

<if test="gender != null" >

gender,

</if>

<if test="email != null" >

email,

</if>

<if test="dId != null" >

d_id,

</if>

</trim>

<trim prefix="values (" suffix=")"


<if test="empId != null" >

#{empId,jdbcType=INTEGER},

</if>


#{empName,jdbcType=VARCHAR},

</if>


#{gender,jdbcType=CHAR},

</if>


#{email,jdbcType=VARCHAR},

</if>


#{dId,jdbcType=INTEGER},

</if>

</trim>

</insert>

<select id="countByExample"

parameterType="com.domain.EmployeeExample"

resultType="java.lang.Integer" >

select count(*) from tbl_emp



</if>

</select>

<select id="selectByPrimaryKeyWidthDept"

resultMap="WithDeptResultMap">

select

<include refid="WithDept_Column_List"/>

from tbl_emp e

left join tnl_dept d on e.d_id = d.dept_id


</select>

<select id="selectByExampleWithDept"

resultMap="WithDeptResultMap">

select


distinct

</if>

<include refid="WithDept_Column_List" />

from tbl_emp e

left join tnl_dept d on e.d_id = d.dept_id



</if>



</if>

</select>

<update id="updateByExampleSelective"

parameterType="map" >

update tbl_emp

<set >

<if test="record.empId != null" >

emp_id = #{record.empId,jdbcType=INTEGER},

</if>

<if test="record.empName != null" >

emp_name =

#{record.empName,jdbcType=VARCHAR},

</if>

<if test="record.gender != null" >

gender = #{record.gender,jdbcType=CHAR},

</if>

<if test="record.email != null" >

email = #{record.email,jdbcType=VARCHAR},

</if>

<if test="record.dId != null" >

d_id = #{record.dId,jdbcType=INTEGER},

</if>

</set>


<include


</if>

</update>

<update id="updateByExample" parameterType="map" >

update tbl_emp

set emp_id = #{record.empId,jdbcType=INTEGER},

emp_name =

#{record.empName,jdbcType=VARCHAR},

gender = #{record.gender,jdbcType=CHAR},

email = #{record.email,jdbcType=VARCHAR},

d_id = #{record.dId,jdbcType=INTEGER}


<include


</if>

</update>

<update id="updateByPrimaryKeySelective"


update tbl_emp

<set >


emp_name = #{empName,jdbcType=VARCHAR},

</if>


gender = #{gender,jdbcType=CHAR},

</if>


email = #{email,jdbcType=VARCHAR},

</if>


d_id = #{dId,jdbcType=INTEGER},

</if>

</set>


</update>

<update id="updateByPrimaryKey"


update tbl_emp

set emp_name = #{empName,jdbcType=VARCHAR},

gender = #{gender,jdbcType=CHAR},

email = #{email,jdbcType=VARCHAR},

d_id = #{dId,jdbcType=INTEGER}


</update>

</mapper>

六. Service层编写

1. Service包下分别创建 DepartmentService接口与 EmployeeService并

创建 impl包在此包下创建他们的实现类

package com.service;



public interface DepartmentService {

List<Department> getAll();

}

package com.service;



public interface EmployeeService {

List<Employee> getAll();

int save(Employee employee);

Boolean checkName(String empName);

Employee getEmp(Integer id);

int update(Employee employee);

int delete(Integer id);

int deleteBatch(List<Integer> ids);

}

package com.service.impl;

import com.dao.DepartmentMapper;


import com.service.DepartmentService;

import

org.springframework.beans.factory.annotation.Autow

ired;

import org.springframework.stereotype.Service;


@Service("departmentService")

public class DepartmentServiceImpl implements

DepartmentService {

@Autowired

private DepartmentMapper departmentMapper;

@Override

public List<Department> getAll() {

return

departmentMapper.selectByExample(null);

}

}

package com.service.impl;

import com.dao.EmployeeMapper;


import com.domain.EmployeeExample;

import com.service.EmployeeService;

import


ired;

import org.springframework.stereotype.Service;


@Service

public class EmployeeServiceImpl implements

EmployeeService {

@Autowired

EmployeeMapper employeeMapper;

/**查询所有员工

* @return

*/

@Override

public List<Employee> getAll(){

return

employeeMapper.selectByExampleWithDept(null);

}

@Override

public int save( Employee employee) {

return

employeeMapper.insertSelective(employee);

}

@Override

public Boolean checkName(String empName) {

EmployeeExample example = new

EmployeeExample();

EmployeeExample.Criteria criteria =

example.createCriteria();

criteria.andEmpNameEqualTo(empName);

return

employeeMapper.countByExample(example) == 0;

}

@Override

public Employee getEmp(Integer id) {

return

employeeMapper.selectByPrimaryKey(id);

}

@Override

public int update(Employee employee) {

return

employeeMapper.updateByPrimaryKeySelective(employe

e);

}

@Override

public int delete(Integer id) {

return

employeeMapper.deleteByPrimaryKey(id);

}

@Override

public int deleteBatch(List<Integer> ids) {

EmployeeExample example = new

EmployeeExample();

EmployeeExample.Criteria criteria =

example.createCriteria();

criteria.andEmpIdIn(ids);

return

employeeMapper.deleteByExample(example);

}

}

七. Controller层编写

1. Controller下创建 DepartmentController与 EmployeeController

package com.controller;


import com.message.Msg;

import com.service.DepartmentService;

import


ired;

import org.springframework.stereotype.Controller;

import

org.springframework.web.bind.annotation.RequestMap

ping;

import

org.springframework.web.bind.annotation.ResponseBo

dy;


@Controller

public class DepartmentController {

@Autowired

DepartmentService departmentService;

@RequestMapping("/depts")

@ResponseBody

public Msg getAllDept(){

List<Department> list =

departmentService.getAll();

return Msg.success().add("depts",list);

}

}

package com.controller;


import com.github.pagehelper.PageHelper;

import com.github.pagehelper.PageInfo;

import com.message.Msg;

import com.service.EmployeeService;

import


ired;

import org.springframework.stereotype.Controller;

import

org.springframework.validation.BindingResult;

import org.springframework.validation.FieldError;

import org.springframework.web.bind.annotation.*;

import

org.springframework.web.servlet.ModelAndView;

import javax.validation.Valid;

import java.util.HashMap;


import java.util.Map;

@Controller

public class EmployeeController {

@Autowired

EmployeeService employeeService;

@RequestMapping("/empJson")

public String empJson(){

return "listAjax";

}

@RequestMapping("/empsAjax")

public @ResponseBody Msg

getEmpsAjax(@RequestParam(value = "pn",defaultValue

= "1")Integer pn){

PageHelper.startPage(pn,5);

List<Employee> list =

employeeService.getAll();

PageInfo<Employee> pageInfo = new

PageInfo<>(list,5);

return Msg.success().add("msg",pageInfo);

}

@RequestMapping(value = "/empSave")

public @ResponseBody Msg empSave(@Valid Employee

employee, BindingResult result){

System.out.println(employee);

if(result.hasErrors()){

Map<String,Object> map = new HashMap<>();

List<FieldError> fieldErrors =

result.getFieldErrors();

for(FieldError e : fieldErrors){

System.out.println("错误的字段" +

e.getField());

System.out.println("错误信息" +

e.getDefaultMessage());

map.put(e.getField(),e.getDefaultMessage());

}

return

Msg.fail().add("errorField",map);

}else{

employeeService.save(employee);

return Msg.success();

}

}

@RequestMapping("checkName")

@ResponseBody

public Msg checkName(String empName){

String regx =

"(^[a-zA-Z0-9]{6,16}$)|(^[\\u2E80-\\u9FFF]{2,6}$)"

;

boolean matches = empName.matches(regx);

if(!matches){

return Msg.fail().add("va_msg","用户名必

须是 6-16位或中文");

}

Boolean flag =

employeeService.checkName(empName);

if(flag){


} else {

return Msg.fail().add("va_msg","用户名不

可用");

}

}

@RequestMapping(value = "/emp/{id}",method =

RequestMethod.GET)

@ResponseBody

public Msg getEmp(@PathVariable("id") Integer

id){

Employee employee =

employeeService.getEmp(id);

return Msg.success().add("emp",employee);

}

@RequestMapping(value = "/emp/{empId}",method =

RequestMethod.PUT)

@ResponseBody

public Msg saveEmp(Employee employee){

employeeService.update(employee);


}

/**

* 批量删除一次删除二合一

* */

@RequestMapping(value = "/emp/{ids}",method =

RequestMethod.DELETE)

@ResponseBody

public Msg delEmp(@PathVariable List<Integer>

ids){

if(ids.size() == 1){

employeeService.delete(ids.get(0));

} else{

employeeService.deleteBatch(ids);

}


}

}

八. Msg编写

1. Message包下创建 Msg类用于封装 Controller的返回值

package com.message;

import lombok.Data;

import java.util.HashMap;

import java.util.Map;

@Data

public class Msg {

// 状态码

/**

*

*/

private int code;

private String msg;

//返回数据

private Map<String,Object> map = new HashMap<>();

public Msg add(String key,Object value){

map.put(key, value);

return this;

}

public static Msg success(){

Msg result = new Msg();

result.setCode(200);

result.setMsg("处理成功!");

return result;

}

public static Msg fail(){

Msg result = new Msg();

result.setCode(500);

result.setMsg("处理失败!");

return result;

}

}

九. 前端代码编写

1. 创建如下目录,导入 bootstrap,jquery等 js与 css插件

在 index.jsp 中写入如下代码

<%--

Created by IntelliJ IDEA.

User: dell

Date: 2020/2/8

Time: 13:22

To change this template use File | Settings | File

Templates.

--%>

<%@ page contentType="text/html;charset=UTF-8"

language="java" %>

<%@taglib prefix="c"

uri="http://java.sun.com/jsp/jstl/core" %>

<!DOCTYPE html>

<html>

<head>

<title>Title</title>

<link rel="stylesheet"

href="${pageContext.request.contextPath}/css/boots

trap.css">



trap-theme.css">

<script

src="${pageContext.request.contextPath}/js/jQuery.

1.12.4.js"></script>

<script

src="${pageContext.request.contextPath}/js/bootstr

ap.min.js"></script>

</head>

<body>

<c:redirect url="empJson"/>

</body>

</html>

2. 主业务代码在 listAjax.jsp 中编写

<%@ taglib prefix="c"

uri="http://java.sun.com/jsp/jstl/core" %>

<%@ page contentType="text/html;charset=UTF-8"

language="java" %>

<!DOCTYPE html>

<html>

<head>

<title>Title</title>



trap.css">



trap-theme.css">

<script

src="${pageContext.request.contextPath}/js/jQuery.

1.12.4.js"></script>

<script

src="${pageContext.request.contextPath}/js/bootstr

ap.min.js"></script>

</head>

<body>

<%--直接发送ajax请求进行查询以json形式进行解析实现平

台无关型--%>

<div class="container">

<%--标题--%>

<div class="row">

<div class="col-md-12">

<h1>SSM_CRUD</h1>

</div>

</div>

<div class="row">

<div class="col-md-offset-8">

<button class="btn btn-primary"

id="addEmp">新增</button>

<button class="btn btn-danger"

id="delEmp">删除</button>

</div>

</div>

<div class="row">

<div class="col-md-12">

<table class="table table-hover">

<thead>

<tr>

<th><input id="checkAll"

type="checkbox"/></th>

<th>#</th>

<th>empName</th>

<th>gender</th>

<th>email</th>

<th>deptName</th>

<th>操作</th>

</tr>

</thead>

<tbody id="empTbody"></tbody>

</table>

</div>

</div>

<div class="row">

<div class="col-md-6" id="pageInfo"></div>

<div class="col-md-6" id="pageNav"></div>

</div>

</div>

<%--模态框--%>



<div class="modal fade" id="empAddModal"

tabindex="-1" role="dialog"

aria-labelledby="myModalLabel">

<div class="modal-dialog" role="document">

<div class="modal-content">

<div class="modal-header">

<button type="button" class="close"

data-dismiss="modal" aria-label="Close"><span

aria-hidden="true">×</span></button>

<h4 class="modal-title"

id="myModalLabel">添加员工</h4>

</div>

<div class="modal-body">

<form class="form-horizontal"

id="empFrom">

<div class="form-group"

id="addEmpName">

<label for="inputEmpName"

class="col-sm-2 control-label">empName</label>

<div class="col-sm-10">

<input type="text"

name="empName" class="form-control"

id="inputEmpName" placeholder="empName">

<span

id="empNameHelpBlock" class="help-block"></span>

</div>

</div>


id="addEmpEmail">

<label for="inputEmail"

class="col-sm-2 control-label">email</label>


<input type="email"

name="email" class="form-control" id="inputEmail"

placeholder="[email protected]">

<span id="emailHelpBlock"

class="help-block"></span>

</div>

</div>


id="addEmpGender">


class="col-sm-2 control-label">gender</label>


<label

class="radio-inline">

<input type="radio"

name="gender" id="genderBoy" value="男">男

</label>

<label


<input type="radio"

name="gender" id="genderGirl" value="女">女

</label>

</div>

</div>


id="addEmpDid">


class="col-sm-2 control-label">department</label>

<%--部门提交 id--%>

<select

class="form-control" id="deptSelect"

name="dId"></select>

</div>

</div>

</form>

</div>

<div class="modal-footer">

<button type="button" class="btn

btn-default" data-dismiss="modal">关闭</button>


btn-primary" id="empSave">保存</button>

</div>

</div>

</div>

</div>



<div class="modal fade" id="empEditModal"

tabindex="-1" role="dialog"

aria-labelledby="myModalLabel">

<div class="modal-dialog" role="document">

<div class="modal-content">

<div class="modal-header">

<button type="button" class="close"

data-dismiss="modal" aria-label="Close"><span

aria-hidden="true">×</span></button>

<h4 class="modal-title" >修改员工

</h4>

</div>

<div class="modal-body">

<form class="form-horizontal"

id="empEditFrom">


id="EditEmpName">

<label for="EditInputEmpName"

class="col-sm-2 control-label">empName</label>


<p

class="form-control-static"

id="EditInputEmpName"></p>

<span


</div>

</div>


id="EditEmpEmail">

<label for="EditInputEmail"

class="col-sm-2 control-label">email</label>


<input type="email"

name="email" class="form-control"

id="EditInputEmail" placeholder="[email protected]">

<span


</div>

</div>


id="EditEmpGender">

<label for="EditInputEmail"

class="col-sm-2 control-label">gender</label>


<label


<input type="radio"

name="gender" id="EditGenderBoy" value="男">男

</label>

<label


<input type="radio"

name="gender" id="EditGenderGirl" value="女">女

</label>

</div>

</div>


id="EditEmpDid">


class="col-sm-2 control-label">department</label>


<%--部门提交 id--%>

<select

class="form-control" id="deptEditSelect"

name="dId"></select>

</div>

</div>

</form>

</div>

<div class="modal-footer">


btn-default" data-dismiss="modal">关闭</button>


btn-primary" id="empEdit">修改</button>

</div>

</div>

</div>

</div>

<script type="text/javascript">

var total

var thisPage

var aPageNum

$(function () {

to_page(1)

});

$(function () {

$('#delEmp').click(function () {

var empName = ""

var ids=new Array()

$.each($('.checkItem:checked'),function

() {

var name =

$(this).parents("tr").find("td:eq(2)").text()

var empId =


empName = empName + name + " "

ids.push(empId)

})

if(confirm("确定删除[" + empName + "]

么?")){

$.ajax({

url :

"${pageContext.request.contextPath}/emp/" + ids,

type : "POST",

data : "_method=DELETE",

success(data){

alert(data.msg)

to_page(thisPage)

}

})

}

})

});

$(function () {

$('#checkAll').click(function () {

var status = $(this).prop("checked")

$('.checkItem').prop("checked",status)

})

});

$(function () {

//加载完成后绑定事件用 on

$(document).on("click",".checkItem",function () {

//判断当前选中的元素的个数决定是否选满了

var len = $('.checkItem:checked').length

$('#checkAll').prop("checked",len ==

aPageNum)

});

});

$(function () {


$(document).on("click",".edit-btn",function

() {

getDepts("#deptEditSelect")

getEmp($(this).attr("empId"))

//吧 id传给更新按钮

$('#empEdit').attr("empId",$(this).attr("empId"))

$("#empEditModal").modal({

backdrop : 'static'

})

});

});

$(function () {


$(document).on("click",".del-btn",function

() {

var empName =


var empId = $(this).attr("empId")

if(confirm("确认删除[" + empName + "]

么?")){

$.ajax({

url :

"${pageContext.request.contextPath}/emp/" + empId,

type : "POST",

data : "_method=DELETE",

success(data){

to_page(thisPage)

}

})

}

})

});

function getEmp(id) {

$.ajax({

url:"${pageContext.request.contextPath}/emp/" + id,

type:"GET",

success(data) {

$("#EditInputEmpName").html("<b>" +

data.map.emp.empName + "</b>")

$("#EditInputEmail").val(data.map.emp.email)

$("#empEditModal

input[name=gender]").val([data.map.emp.gender])

$("#empEditModal

select").val([data.map.emp.dId])

}

})

}

$(function () {

$("#addEmp").click(function () {

//表单重置表单状态重置

reset_from('#empAddModal form')

getDepts("#deptSelect")

$("#empAddModal").modal({

backdrop : 'static'

})

})

});

function reset_from(ele){

$(ele)[0].reset()

$(ele).find('.form-group').removeClass("has-succes

s has-error")

.find('.help-block').text("")

}

$(function () {

$('#inputEmpName').change(function () {

//发送请求校验用户名

$.ajax({

url:"${pageContext.request.contextPath}/checkName"

,

data:"empName=" + this.value,

success:function (data) {

if(data.code == 200){

show_validate_msg("#addEmpName","success",data.map

.va_msg)

$('#empSave').attr("ajax-va","success")

} else if(data.code == 500) {

show_validate_msg("#addEmpName","error",data.map.v

a_msg)

$('#empSave').attr("ajax-va","error")

}

}

})

})

});

$(function () {

$('#empEdit').click(function(){

validate_edit_form()

$.ajax({

url :

"${pageContext.request.contextPath}/emp/" +

$(this).attr("empId"),

//jquery 可以发送 put请求但是 tomcat

默认不封装参数到请求域(只有 post才会封装)

//需要设置 tomcat一个 filter来帮忙封装

进去

type : "POST",

data : $("#empEditModal

form").serialize() + "&_method=PUT",

success(data){

$('#empEditModal').modal('hide')

to_page(thisPage)

}

})

})

});

$(function () {

$('#empSave').click(function () {

//校验格式

if(!validate_add_form()){

return false

}

$.ajax({

url:"${pageContext.request.contextPath}/empSave",

data:$("#empAddModal

form").serialize(),

type:"post",


//检验是否添加失败

if(data.code == 200){

// 可以通过 serialize() 方法来

序列化表单

$('#empAddModal').modal('hide')

to_page(total)

} else {

console.log(data)

if(undefined !=

data.map.errorField.empName){

show_validate_msg("#addEmpName","error",data.map.e

rrorField.empName)


}

if(undefined !=

data.map.errorField.email){

show_validate_msg("#addEmpEmail","error",data.map.

errorField.email)


}

}

}

})

})

});

function validate_add_form() {

var emp = $("#empAddModal

form").serializeArray()

var empName = emp[0].value

var email = emp[1].value

var regName =

/(^[a-zA-Z0-9]{6,16}$)|(^[\u2E80-\u9FFF]{2,6}$)/

var regEmail =

/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z

0-9]+)*\.[A-Za-z0-9]+$/

if(!regName.test(empName)){

show_validate_msg("#addEmpName","error","请输入

6-16英文或 2-6的中文")

return false

} else {

show_validate_msg("#addEmpName","success","")

}

if(!regEmail.test(email)){

show_validate_msg("#addEmailName","error","邮箱格式

错误")

return false

} else {

show_validate_msg("#addEmailName","success","")

}

$("#addEmpGender").addClass("has-success")

$("#addEmpDid").addClass("has-success")

return true

}

function validate_edit_form() {

var emp = $("#empEditModal

form").serializeArray()

var email = emp[1].value

var regEmail =

/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z

0-9]+)*\.[A-Za-z0-9]+$/

if(!regEmail.test(email)){

show_validate_msg("#eidtEmpName","error","邮箱格式

错误")

return false

} else {

show_validate_msg("#addEmpName","success","")

}

return true

}

function show_validate_msg(ele,status,msg) {

$(ele).removeClass("has-success

has-error").find('span').text("")

if("success" == status){

$(ele).addClass("has-success").find('span').text(m

sg)

} else if("error" == status){

$(ele).addClass("has-error").find('span').text(msg

)

}

}

function getDepts(ele) {

$.ajax({

url:"${pageContext.request.contextPath}/depts",

type:"get",


var department = data.map.depts

$(ele).empty()

$.each(department,function () {

var options =

$("<option></option>").append(this.deptName).val(t

his.deptId)

$(ele).append(options)

})

}

})

}

function build_emp(result) {

$('#empTbody').empty()

var emps = result.map.msg.list

$.each(emps,function (index, item) {

var empid =

$("<td></td>").append(item.empId)

var empName =

$("<td></td>").append(item.empName)

var gender =

$("<td></td>").append(item.gender)

var email =

$("<td></td>").append(item.email)

var departmentName =

$("<td></td>").append(item.department.deptName)

var buttonEdit =

$("<button></button>").addClass("btn btn-primary

btn-sm")

.append($("<span></span>").addClass

("glyphicon glyphicon-pencil

edit-btn").attr("empId",item.empId).append("编辑

"))

var buttonDel =

$("<button></button>").addClass("btn btn-danger

btn-sm")

.append($("<span></span>").addClass

("glyphicon glyphicon-remove

del-btn").attr("empId",item.empId).append("删除"))

var btnTd =

$("<td></td>").append(buttonEdit).append("

").append(buttonDel)

$("<tr></tr>").append("<td><input

type='checkbox' class='checkItem'/></td>")

.append(empid).append(empName).appe

nd(gender).append(email).append(departmentName)

.append(btnTd)

.appendTo($('#empTbody'))

})

}

function build_page(result) {

// 解析分页信息

var pageInfo = result.map.msg

$("#pageInfo").empty().append("当前第"+

pageInfo.pageNum +"页,总共"+ pageInfo.pages + "页\n"

+

",总"+ pageInfo.total +"个")

total = pageInfo.pages

thisPage = pageInfo.pageNum

aPageNum = pageInfo.size

}

function build_nav(result) {

// 解析分页条数据

var ul =

$("<ul></ul>").addClass("pagination")

var firstPageLi =

$("<li></li>").append($("<a></a>").append("首页

").attr("href","#"))

var lastPageLi =

$("<li></li>").append($("<a></a>").append("尾页


var nextPageLi =

$("<li></li>").append($("<a></a>").append("»


var prePageLi =

$("<li></li>").append($("<a></a>").append("«


prePageLi.click(function () {

to_page(result.map.msg.pageNum - 1 )

})

nextPageLi.click(function () {

to_page(result.map.msg.pageNum + 1 )

})

if(result.map.msg.hasPreviousPage == false){

prePageLi = null

firstPageLi.addClass("disabled")

} else {

firstPageLi.click(function () {

to_page(1)

})

}

if(result.map.msg.hasNextPage == false){

nextPageLi = null

lastPageLi.addClass("disabled")

} else {

lastPageLi.click(function () {

to_page(result.map.msg.pages)

})

}

ul.append(firstPageLi).append(prePageLi)

$.each(result.map.msg.navigatepageNums,function

(index, item) {

var numLi =

$("<li></li>").append($("<a></a>").append(item).at

tr("href","#"))

if(result.map.msg.pageNum == item){

numLi.addClass("active")

}

numLi.click(function () {

to_page(item)

})

ul.append(numLi)

})

ul.append(nextPageLi).append(lastPageLi)

var nav = $("<nav></nav>").addClass("Page

navigation").append(ul)

$("#pageNav").empty().append(nav)

}

function to_page(pn) {

$.ajax({

url:"${pageContext.request.contextPath}/empsAjax",

data:"pn=" + pn,

type:"get",


build_emp(data)

build_page(data)

build_nav(data)

}

})

$("#checkAll").prop("checked",false)

}

</script>

</body>

</html>

十. 配置 tomcat服务器

1. 在 addConfiguration 配置添加 tomcat

创建完成后点击右下角 fix创建 war 包,并指定 tomcat

2. 点击绿色小箭头启动如果出现 java.lang.ClassNotFoundException:org.springframework.web.context.ContextLoaderListener 异常再在 project structure 中的

artifacts 中右边右键 putinto ,build 一下项目

3. 完成效果图

工程中类和方法的说明

一. Msg 类Msg 类用于封装 controller返回的值,除了这种封装也可以封装为枚举类

code属性用于保存响应状态码(200 说明成功)Msg 用于保存返回的信息

Msp 用于保存返回的数据

Add()方法用于向 map 中添加数据

Success 方法会返回一个 Msg 可以链式调用 add 方法来进行赋值

Msg.success().add("depts",list);

二. Example 实体类

用于封装与解耦 mapper 中的 sql 语句,产生 sql 模板,这样就将某条件下的 sql

语句变为了方法

OrderByClause 用于封装排序规则

Distinct 用于封装查询字段

oredCriteria 封装条件的集合

Criteria 用于封装 GeneratedCriteria暴露 Criterion 集合继承于 GeneratedCriteria类

GeneratedCriteria 里面创建了一个 Criterion 集合,定义了具体的条件

Criterion 类将条件进行了封装产生条件的实体类

三. Mapper.xml 文件

Sql标签将条件进行了封装到时候需要时直接引用即可

XxxExample 进行条件查询的方法里面调用了 sql标签定义好的 sql

Ps 邮箱请写正确邮箱,若邮箱不正确会添加不上没有反应,邮箱没有在前端做验

证,可以自己写一个

Ssm 简单 crud 项目

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