ssm框架的多表查询和增删查改

必须声明本文章==》http://www.cnblogs.com/zhu520/p/7883273.html 

一：

1）：我的运行环境

我使用myeclipse（你也可以使用eclipse），tomcat7

jar包 放在百度云，托到文章最后有链接下载即可（其实也可以根据我之前http://www.cnblogs.com/zhu520/p/7772823.html 去弄，不需要去网上下载（但是只是对myeclipse而言，eclipse还是要到网上下载的jar包的））

可以去看看孤傲苍狼写的Mybatis  https://www.cnblogs.com/xdp-gacl/p/4261895.html

2）：包的情况

3）：配置

applicationContext.xml ==》少了很多代码

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xsi:schemaLocation="
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
    http://www.springframework.org/schema/aop   
    http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
    http://www.springframework.org/schema/context  
    http://www.springframework.org/schema/context/spring-context-3.1.xsd  
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
    <!-- 开启注解 -->
    <context:annotation-config />
    <!-- 自动扫描 -->
    <context:component-scan base-package="zhu.dao,zhu.service">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Repository" />
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Service" />
    </context:component-scan>
</beans>

 jdbc.properties

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/jdbc01?useUnicode=true&characterEncoding=utf-8
username=root
password=root
validationQuery=SELECT 1
# u6570u636eu5e93u914du7f6e
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/user?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull
jdbc.user=root
jdbc.password=root
#u5305u6587u4ef6u4f4du7f6e
targetProject=THIS4
package.model=zhu.po
package.sql.mapper=zhu.mapper
package.dao.mapper=zhu.dao

 spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.1.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">

    <!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 -->
    <context:component-scan base-package="zhu.web">
        <context:include-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    
    <!-- 日期转换 必须放在<mvc:annotation-driven />前面 -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"></bean>
        
    <!-- 注解方式 -->
    <mvc:annotation-driven>
    </mvc:annotation-driven>

    <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
        
    <!--mvc配置视图解析  -->
    <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" >  
        <property name="prefix" value="/WEB-INF/"></property>  
        <property name="suffix" value=".jsp"></property>  
    </bean>    
    <!--跳转的时候只用写jsp名字，不用带后缀，因为默认的后缀“.jsp”,路径为“/WEB-INF/jsp”  -->


</beans>

 spring-mybatis.xml 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
    http://www.springframework.org/schema/aop   
    http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
    http://www.springframework.org/schema/context  
    http://www.springframework.org/schema/context/spring-context-3.1.xsd  
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">

    <!-- ========================================数据库方言========================================= -->
    <!-- properties配置文件 -->
    <bean id="dbProperties"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <!-- 是否忽略不可解析的 -->
        <property name="ignoreUnresolvablePlaceholders" value="true" />
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
            </list>
        </property>
    </bean>

    <!-- ========================================数据源配置========================================= -->
    <!-- 配置数据源，使用的是alibaba的Druid(德鲁伊)数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
        init-method="init" destroy-method="close">
        <property name="url" value="${url}" />
        <property name="username" value="${username}" />
        <property name="password" value="${password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="0" />
        <!-- 连接池最大使用连接数量 -->
        <property name="maxActive" value="20" />
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="20" />
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="0" />
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="60000" />
        <property name="validationQuery" value="${validationQuery}" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <property name="testWhileIdle" value="true" />
        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000" />
        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="25200000" />
        <!-- 打开removeAbandoned功能 -->
        <property name="removeAbandoned" value="true" />
        <!-- 1800秒，也就是30分钟 -->
        <property name="removeAbandonedTimeout" value="1800" />
        <!-- 关闭abanded连接时输出错误日志 -->
        <property name="logAbandoned" value="true" />
        <!-- 监控数据库 -->
        <!-- <property name="filters" value="stat" /> -->
        <property name="filters" value="mergeStat" />
    </bean>

    <!-- ========================================MyBatis的配置项============================== -->
    <!-- 配置sqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 实例化sqlSessionFactory时需要使用上述配置好的数据源以及SQL映射文件 -->
        <property name="dataSource" ref="dataSource" />
        <!-- <property name="configLocation" value="classpath:mybatis.cofig.xml" /> -->
        <!-- 自动扫描Mybatis的Mapper.xml文件 -->
        <property name="mapperLocations" value="classpath:zhu/mapper/*.xml" />
    </bean>

    <!-- 配置扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 扫描zhu.dao这个包以及它的子包下的所有映射接口类 -->
        <property name="basePackage" value="zhu.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
    </bean>

    <!-- 配置事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 拦截器方式配置事物 -->
    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED" />
            <tx:method name="append*" propagation="REQUIRED" />
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="save*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="modify*" propagation="REQUIRED" />
            <tx:method name="edit*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="remove*" propagation="REQUIRED" />
            <tx:method name="repair" propagation="REQUIRED" />
            <tx:method name="delAndRepair" propagation="REQUIRED" />
            <tx:method name="get*" propagation="SUPPORTS" />
            <tx:method name="find*" propagation="SUPPORTS" />
            <tx:method name="load*" propagation="SUPPORTS" />
            <tx:method name="search*" propagation="SUPPORTS" />
            <tx:method name="datagrid*" propagation="SUPPORTS" />
            <tx:method name="*" propagation="SUPPORTS" />
        </tx:attributes>
    </tx:advice>

    <aop:config>
        <!-- 配置所有的Advice,使用正则表达式，配置所有类，所有返回值的方法 -->
        <aop:pointcut id="transactionPointcut"
            expression="execution(* zhu.service..*Impl.*(..))" />
        <aop:advisor pointcut-ref="transactionPointcut"
            advice-ref="transactionAdvice" />
    </aop:config>

    <!-- 配置druid监控spring jdbc -->
    <bean id="druid-stat-interceptor"
        class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor"></bean>
    <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut"
        scope="prototype">
        <property name="patterns">
            <list>
                <value>zhu.service.*</value>
            </list>
        </property>
    </bean> 

    <aop:config>
        <aop:advisor advice-ref="druid-stat-interceptor"
            pointcut-ref="druid-stat-pointcut" />
    </aop:config>

</beans>

 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <display-name></display-name>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml, classpath:spring-mybatis.xml</param-value>
    </context-param>

    <listener>
        <description>spring监听器</description>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <description>spring mvc servlet</description>
        <servlet-name>springMvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <description>spring mvc 配置文件</description>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <init-param>
            <param-name>activeReverseAjaxEnabled</param-name>
            <param-value>true</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>springMvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
    </welcome-file-list>

</web-app>

 4）：po包

 

EmpDeptVo.java

package zhu.po;

import java.util.Date;

 
 

public class EmpDeptVo {
    private Integer eid;  //员工id
    private String ename; //员工编号
    private int did;     //部门id
    private boolean gende;//性别
    private int age;     //年龄
     
    private String workDate;//入职时间
    private String password;//密码
    
     
    private String dname;//部门名称
    
    public EmpDeptVo(){}
    
    //用来查询数据
    public EmpDeptVo(Integer eid,String ename,boolean gende ,int age,String workDate,String password,int did,String dname ){
        this.eid=eid;
        this.ename=ename;
        this.gende=gende;
        this.age=age;
        this.workDate=workDate;
        this.password=password;
        this.did=did;
        this.dname=dname;
    }

    public Integer getEid() {
        return eid;
    }


    public void setEid(Integer eid) {
        this.eid = eid;
    }


    public String getEname() {
        return ename;
    }


    public void setEname(String ename) {
        this.ename = ename;
    }


    public int getDid() {
        return did;
    }


    public void setDid(int did) {
        this.did = did;
    }


     


    public boolean isGende() {
        return gende;
    }

    public void setGende(boolean gende) {
        this.gende = gende;
    }

    public int getAge() {
        return age;
    }


    public void setAge(int age) {
        this.age = age;
    }


    public String getWorkDate() {
        return workDate;
    }


    public void setWorkDate(String workDate) {
        this.workDate = workDate;
    }


    public String getPassword() {
        return password;
    }


    public void setPassword(String password) {
        this.password = password;
    }


    public String getDname() {
        return dname;
    }


    public void setDname(String dname) {
        this.dname = dname;
    }
    
    
    
}

 Tbdept.java

package zhu.po;

public class Tbdept {
    private Integer did;

    private String dname;

    public Integer getDid() {
        return did;
    }

    public void setDid(Integer did) {
        this.did = did;
    }

    public String getDname() {
        return dname;
    }

    public void setDname(String dname) {
        this.dname = dname;
    }
}

 Tbemp.java

package zhu.po;

import java.util.Date;

public class Tbemp {
    private Integer eid;

    private Integer did;

    private Integer age;

    private Boolean gende;

    private Date workdate;

    private String password;

    private String ename;

    public Integer getEid() {
        return eid;
    }

    public void setEid(Integer eid) {
        this.eid = eid;
    }

    public Integer getDid() {
        return did;
    }

    public void setDid(Integer did) {
        this.did = did;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Boolean getGende() {
        return gende;
    }

    public void setGende(Boolean gende) {
        this.gende = gende;
    }

    public Date getWorkdate() {
        return workdate;
    }

    public void setWorkdate(Date workdate) {
        this.workdate = workdate;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getEname() {
        return ename;
    }

    public void setEname(String ename) {
        this.ename = ename;
    }
}

 5）：映射文件

TbdeptMapper.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" >

<!--namespace命令空间，作用就是对sql进行分类化管理，理解sql隔离
注意：使用mapper代理方法开发，namepace有特殊重要的作用
  -->
<mapper namespace="zhu.dao.TbdeptMapper" >
  <resultMap id="BaseResultMap" type="zhu.po.Tbdept" >
    <id column="did" property="did" jdbcType="INTEGER" />
    <result column="dname" property="dname" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    did, dname
  </sql>
  
</mapper>

 TbempMapper.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="zhu.dao.TbempMapper" >
  <resultMap id="BaseResultMap" type="zhu.po.Tbemp" >
    <id column="eid" property="eid" jdbcType="INTEGER" />
    <result column="did" property="did" jdbcType="INTEGER" />
    <result column="age" property="age" jdbcType="INTEGER" />
    <result column="gende" property="gende" jdbcType="BIT" />
    <result column="workDate" property="workdate" jdbcType="DATE" />
    <result column="password" property="password" jdbcType="VARCHAR" />
    <result column="ename" property="ename" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    eid, did, age, gende, workDate, password, ename
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from tbemp
    where eid = #{eid,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from tbemp
    where eid = #{eid,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="zhu.po.Tbemp" >
    insert into tbemp (eid, did, age, 
      gende, workDate, password, 
      ename)
    values (#{eid,jdbcType=INTEGER}, #{did,jdbcType=INTEGER}, #{age,jdbcType=INTEGER}, 
      #{gende,jdbcType=BIT}, #{workdate,jdbcType=DATE}, #{password,jdbcType=VARCHAR}, 
      #{ename,jdbcType=VARCHAR})
  </insert>
  <insert id="insertSelective" parameterType="zhu.po.Tbemp" >
    insert into tbemp
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="eid != null" >
        eid,
      </if>
      <if test="did != null" >
        did,
      </if>
      <if test="age != null" >
        age,
      </if>
      <if test="gende != null" >
        gende,
      </if>
      <if test="workdate != null" >
        workDate,
      </if>
      <if test="password != null" >
        password,
      </if>
      <if test="ename != null" >
        ename,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="eid != null" >
        #{eid,jdbcType=INTEGER},
      </if>
      <if test="did != null" >
        #{did,jdbcType=INTEGER},
      </if>
      <if test="age != null" >
        #{age,jdbcType=INTEGER},
      </if>
      <if test="gende != null" >
        #{gende,jdbcType=BIT},
      </if>
      <if test="workdate != null" >
        #{workdate,jdbcType=DATE},
      </if>
      <if test="password != null" >
        #{password,jdbcType=VARCHAR},
      </if>
      <if test="ename != null" >
        #{ename,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="zhu.po.Tbemp" >
    update tbemp
    <set >
      <if test="did != null" >
        did = #{did,jdbcType=INTEGER},
      </if>
      <if test="age != null" >
        age = #{age,jdbcType=INTEGER},
      </if>
      <if test="gende != null" >
        gende = #{gende,jdbcType=BIT},
      </if>
      <if test="workdate != null" >
        workDate = #{workdate,jdbcType=DATE},
      </if>
      <if test="password != null" >
        password = #{password,jdbcType=VARCHAR},
      </if>
      <if test="ename != null" >
        ename = #{ename,jdbcType=VARCHAR},
      </if>
    </set>
    where eid = #{eid,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="zhu.po.Tbemp" >
    update tbemp
    set did = #{did,jdbcType=INTEGER},
      age = #{age,jdbcType=INTEGER},
      gende = #{gende,jdbcType=BIT},
      workDate = #{workdate,jdbcType=DATE},
      password = #{password,jdbcType=VARCHAR},
      ename = #{ename,jdbcType=VARCHAR}
    where eid = #{eid,jdbcType=INTEGER}
  </update>
  
   <!-- 增加查询所有的数据 的方法-->
  <select id="listAll" resultType="zhu.po.EmpDeptVo">
   SELECT tbdept.dname,tbemp.eid,tbemp.age,
tbemp.gende,tbemp.workDate,tbemp.`password`,
tbemp.ename FROM  tbemp INNER JOIN tbdept ON tbdept.did = tbemp.did
  </select>
  
   <!--在映射文件中配置很多sql语句  -->
   <!-- 需求：通过id查询员工表的记录 -->
  <!--通过select执行数据库的查询 
  id:标签映射文件的sql，将sql语句封装 到mappedStatement对象中，
     所以将id成为statement的id
  #{}表示一个占位符
  parameterType：指定输入参数的类型
  resultType:指定sql输出结果的所映射的java的对象类型，select指定resultType表示
  将单挑记录映射成的Java对象
   -->
  <!-- 增加通过账号查询一条数据-->
  <select id="getByName"    resultType="zhu.po.Tbemp">
  SELECT  * FROM tbemp
   where  tbemp.ename= #{ename,jdbcType=VARCHAR}
  </select>
</mapper>

 6）：dao包

TbempMapper.java 

package zhu.dao;

import java.util.List;

import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

import zhu.po.EmpDeptVo;
import zhu.po.Tbemp;
@Repository(value = "empMapper")
public interface TbempMapper {
    
    int deleteByPrimaryKey(Integer eid); 
    int insert(Tbemp record); 
    int insertSelective(Tbemp record); 
    Tbemp selectByPrimaryKey(Integer eid); 
    int updateByPrimaryKeySelective(Tbemp record); 
    int updateByPrimaryKey(Tbemp record);
     List<EmpDeptVo> listAll();
    
    Tbemp getByName(@Param("ename") String ename);
}

 7）：service包

IEmpService.java

package zhu.service;

import java.util.List;

import zhu.po.EmpDeptVo;
import zhu.po.Tbemp;

 

public interface IEmpService {
    
    void save(Tbemp t);

    void update(Tbemp t);

    void delete(int id);

    Tbemp getByID(int id);

    List<EmpDeptVo> listAll();

    Tbemp getByName(String name);
}

 EmpServiceImpl.java

package zhu.service.impl;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

 

import zhu.dao.TbempMapper;
import zhu.po.EmpDeptVo;
import zhu.po.Tbemp;
import zhu.service.IEmpService;

 

@Service(value="myIEmpService")
public class EmpServiceImpl  implements IEmpService{
    
    @Autowired
    private TbempMapper empMapper;

    @Override
    public void save(Tbemp t) {
        // TODO Auto-generated method stub
        empMapper.insert(t);
    }

    @Override
    public void update(Tbemp t) {
        // TODO Auto-generated method stub
        empMapper.updateByPrimaryKey(t);
    }

    @Override
    public void delete(int id) {
        // TODO Auto-generated method stub
        empMapper.deleteByPrimaryKey(id);
    }

    @Override
    public Tbemp getByID(int id) {
        // TODO Auto-generated method stub
        return empMapper.selectByPrimaryKey(id);
    }

    @Override
    public List<EmpDeptVo> listAll() {
        // TODO Auto-generated method stub
        return empMapper.listAll();
    }

    @Override
    public Tbemp getByName(String name) {
        // TODO Auto-generated method stub
        return empMapper.getByName(name);
    }
}

 8）：web包

EmpAction.java 

package zhu.web;

import java.sql.Date;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import zhu.po.EmpDeptVo;
import zhu.po.Tbemp;
import zhu.service.IEmpService;

@Controller
@RequestMapping("/EmpAction")
public class EmpAction {

    @Autowired
    private IEmpService myIEmpService;

    // 登录账号
    @RequestMapping("/getByName")
    public ModelAndView getByName(String ename, String password) {
        try {
            Tbemp tbemp = myIEmpService.getByName(ename);
            if (tbemp.getEid() != null) { 
                    return listAll();  
            }else{
                ModelAndView mv = new ModelAndView("/register");
                mv.addObject("ename", ename); 
                return mv ;
            } 
        } catch (Exception e) {
            ModelAndView mv = new ModelAndView("/register");
            mv.addObject("ename", ename); 
            return mv ;
        }
        
    }

    // 查询所有的数据
    private ModelAndView listAll() {
        List<EmpDeptVo> emps = myIEmpService.listAll();
        ModelAndView mv = new ModelAndView("/jsp_CRUD/login_ok1");
        mv.addObject("empVo", emps);
        return mv;
    }

    // 新增数据
    @RequestMapping("/save")
    public ModelAndView save(EmpDeptVo emp) {
        try {
            Tbemp tbEmp1 = new Tbemp();
            tbEmp1.setAge(emp.getAge());
            tbEmp1.setDid(emp.getDid());
            tbEmp1.setEname(emp.getEname());
            tbEmp1.setGende(emp.isGende());
            // request.getParameter("workDate");
            tbEmp1.setPassword(emp.getPassword());
            //将字符串转换为==》Data
            String workdate = emp.getWorkDate();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Date sqlData = new Date(sdf.parse(workdate).getTime());
            tbEmp1.setWorkdate(sqlData);
            myIEmpService.save(tbEmp1);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return listAll();
    }

    // 查询一条数据
    @RequestMapping("/findById")
    public ModelAndView findById(int eid) {
        Tbemp tbEmp1 = myIEmpService.getByID(eid);
        ModelAndView mView = new ModelAndView("/jsp_CRUD/update");
         SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
         String dateString = formatter.format(tbEmp1.getWorkdate());
        mView.addObject("e", tbEmp1);
        ////将Data转换为==》字符串
        mView.addObject("edata",dateString);
        return mView;
    }

    // 修改数据
    @RequestMapping("/update")
    public ModelAndView update(EmpDeptVo emp) {
        try {
            Tbemp tbEmp1 = new Tbemp();
            tbEmp1.setAge(emp.getAge());
            tbEmp1.setDid(emp.getDid());
            tbEmp1.setEname(emp.getEname());
            tbEmp1.setGende(emp.isGende());
            tbEmp1.setEid(emp.getEid());
            tbEmp1.setPassword(emp.getPassword());
            //将字符串转换为==》Data
            String workdate = emp.getWorkDate();
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Date sqlData  = new Date(sdf.parse(workdate).getTime());
            tbEmp1.setWorkdate(sqlData);
            myIEmpService.update(tbEmp1);
        } catch (ParseException e) {

            e.printStackTrace();

        }
        return listAll();
    }

    // 删除
    @RequestMapping("/delete")
    public ModelAndView delete(int eid) {
        myIEmpService.delete(eid);
        return listAll();

    }
}

 9）：jsp

 login_ok1.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>所有数据</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
     
  </head>
  
  <body>
  <div align="center"  >  
     <table cellspacing="0" border="1">
     <thead>
    <tr>
     <td>id</td>
      <td>编号</td>
       <td>年龄</td>
        <td>性别</td>
         <td>部门</td>
         <td>时间</td>
         <td>密码</td>
         <td>修改</td>
         <td>删除</td>
    </tr>
     </thead> 
     <tbody>
     <c:forEach items="${empVo}" var="list2">
        <tr>
      <td>${ list2.eid}</td>
      <td>${ list2.ename}</td>
        <td>${ list2.age}</td> 
      <c:if test="${ list2.gende==false}"><td>男</td></c:if>
      <c:if test="${ list2.gende==true}"><td>女</td></c:if>  
       <td>${ list2.dname}</td>
         <td>${ list2.workDate}</td>
         <td>${ list2.password}</td> 
         <td><a href="EmpAction/findById.do?eid=${list2.eid }"  >修改</a></td>
         <td><a href="EmpAction/delete.do?eid=${list2.eid }"   >删除</a></td> 
        </tr>
     </c:forEach>
     </tbody>
     </table>
  </div> 
  <hr/>
  <div align="center"  >   
     <form action="EmpAction/save.do" method="post">
               编号:<input type="text" name="ename"/>      <br/>
             密码:<input type="text" name="password"/>  <br/>
             时间:<input type="text" name="workDate"/>  <br/>
              年龄:<input type="text" name="age"/>       <br/> 
              性别:<select name="gende">
          <option value="0">男</option>
          <option value="1">女</option>
          </select>      <br/>
              部门:<select name="did">
          <option value="1">A部门</option>
          <option value="2">B部门</option>
          </select>        <br/>
         <input type="submit" value="新增"/> 
        </form> 
  </div> 
      
  
  </body>
</html>

 update.jsp 

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'update.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->

  </head>
  
  <body>
   <hr/>
  <div align="center"  >   
     <form action="EmpAction/update.do" method="post">
     <input type="hidden" name="eid" value="${ e.eid}"/> 
      编号:<input type="text" name="ename" value="${ e.ename}"/>      <br/>
             密码:<input type="text" name="password" value="${ e.password}"/>  <br/>
             时间:<input type="text" name="workDate" value="${ edata}"/>  <br/>
              年龄:<input type="text" name="age" value="${ e.age}"/>       <br/>  
              性别:<c:if  test="${e.gende==false }">
              <select name="gende">
                <option value="0">男</option>
                <option value="1">女</option>
                </select> 
         </c:if>
         <c:if test="${e.gende==true }">
              <select name="gende">
                <option value="1">女</option>
                <option value="0">男</option> 
                </select> 
         </c:if> <br/>
              部门:<c:if test="${e.did==1 }">
               <select name="did" >
                      <option value="1">A部门</option>
                      <option value="2">B部门</option>
                </select> 
         </c:if>
         <c:if test="${e.did==2 }">
              <select name="did" > 
                      <option value="2">B部门</option>
                      <option value="1">A部门</option>
                </select> 
         </c:if>        <br/>
         <input type="submit" value="修改"/> 
        </form> 
  </div> 
      <!--<input type="text" name="gende" value="${e.gende==true?'女':'男' }"><br>  -->
  </body>
</html>

运行效果：

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