1、SpringMVC+MyBaits实现查询所有

1、创建如下所示项目

2、在src下的com.entity包下创建 Emp.java

package com.entity;
/**
 * 
 * @author Holly老师
 *
 */
public class Emp {
   private Integer empno;
   private String ename;
   private double sal;
   private Integer deptno;
   private String dname;
   
public Integer getEmpno() {
    return empno;
}
public void setEmpno(Integer empno) {
    this.empno = empno;
}
public String getEname() {
    return ename;
}
public void setEname(String ename) {
    this.ename = ename;
}
public double getSal() {
    return sal;
}
public void setSal(double sal) {
    this.sal = sal;
}
public Integer getDeptno() {
    return deptno;
}
public void setDeptno(Integer deptno) {
    this.deptno = deptno;
}
public String getDname() {
    return dname;
}
public void setDname(String dname) {
    this.dname = dname;
}
@Override
public String toString() {
    return "Emp [deptno=" + deptno + ", dname=" + dname + ", empno=" + empno
            + ", ename=" + ename + ", sal=" + sal + "]";
}
   

}

3、在src下的com.mapper包下创建 EmpMapper.java

package com.mapper;

import java.util.List;

import com.entity.Emp;
/**
 * 
 * @author Holly老师
 *
 */
public interface EmpMapper {
    public List<Emp> findAll();

}

4、在src下的com.mapper包下创建 EmpMapper.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.mapper.EmpMapper">
  <select id="findAll" resultType="com.entity.Emp">
    select e.empno,e.ename,e.sal,e.deptno,d.dname from emp e,dept d where e.deptno=d.deptno
  </select>
</mapper>

5、在src下的com.service包下创建 EmpService.java

package com.service;

import java.util.List;

import com.entity.Emp;

/**
 * 
 * @author Holly老师
 *
 */
public interface EmpService {
    
    List<Emp> findAll();

}

6、在src下的com.service.impl包下创建EmpServiceImpl.java

package com.service.impl;

import java.util.List;


import javax.annotation.Resource;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.entity.Emp;
import com.mapper.EmpMapper;
import com.service.EmpService;
/**
 * 
 * @author Holly老师
 *
 */
@Service
@Transactional
public class EmpServiceImpl implements EmpService {
    @Resource
    private EmpMapper empMapper;

    public List<Emp> findAll() {
       return empMapper.findAll();        
    }

}

7、在com.controller包下创建EmpController.java

package com.controller;
import java.util.List;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.entity.Emp;
import com.service.impl.EmpServiceImpl;
/**
 * 7.控制类
 * @author pc
 *
 */
@Controller
public class EmpController {
    @Resource
    private EmpServiceImpl empServiceImpl;
    //方法1
    @RequestMapping("/findAll.do")
    public String findAll(HttpServletRequest request,HttpServletResponse response){
        List<Emp> list=empServiceImpl.findAll();
        if(list!=null){
            System.out.println("findAll success");
            request.setAttribute("list", list);
        }else{
            System.out.println("findAll error");
            
        }
        return "/index.jsp";
    }
    

}

8、在WebRoot下的WEB-INF下创建springmvc-servlet.xml

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

<!-- 1.mvc支持注解 -->
<mvc:annotation-driven/>

<!-- 2.全局扫描包资源 -->
<context:component-scan base-package="com"/>

<!-- 3.驱动管理的数据源配置 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
  <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"/>
  <property name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:orcl"/>
  <property name="username" value="scott"/>
  <property name="password" value="tiger"/>
</bean>

<!-- 4.配置数据源的事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  <property name="dataSource" ref="dataSource"/>
</bean>

<!-- 5.配置sqlsession的bean工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="dataSource"/>
  <property name="mapperLocations" value="classpath:com/mapper/EmpMapper.xml"/>
</bean>

<!-- 6.spring和mybaits整合，自动扫映射输入参数 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  <property name="basePackage" value="com.mapper"/>
</bean>
</beans>

9、在WebRoot下的WEB-INF下创建web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    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_2_5.xsd">
    <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    </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>
    </filter>
    <filter-mapping>
     <filter-name>CharacterEncodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>
  <welcome-file-list>
    <welcome-file></welcome-file>
  </welcome-file-list>
</web-app>

10、在WebRoot下创建index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.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>
      <table>
        <tr><td>员工编号</td><td>员工姓名</td><td>工资</td><td>部门编号</td><td>部门名称</td></tr>
        <c:forEach var="i" items="${list}">
        <tr><td>${i.empno }</td><td>${i.ename }</td><td>${i.sal }</td><td>${i.deptno }</td><td>${i.dname}</td></tr>
        </c:forEach>
       </table>
      
  </body>
</html>

11、运行效果如下