1、整合适配包
2、Mybatis整合
spring-servlet.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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
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/spring-context-4.0.xsd">
<!--SpringMVC只是控制网站跳转逻辑 -->
<!-- 只扫描控制器 -->
<context:component-scan base-package="com.atguigu.mybatis" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!--处理动态资源-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--处理静态资源-->
<mvc:default-servlet-handler/>
</beans>
applicationContext.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:context="http://www.springframework.org/schema/context"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
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://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- Spring希望管理所有的业务逻辑组件，等。。。 -->
<context:component-scan base-package="com.atguigu.mybatis">
<context:exclude-filter type="annotation"
expression="org.springframework.stereotype.Controller" />
</context:component-scan>
<!-- 引入数据库的配置文件 -->
<context:property-placeholder location="classpath:dbconfig.properties" />
<!-- Spring用来控制业务逻辑。数据源、事务控制、aop -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="jdbcUrl" value="${jdbc.url}"></property>
<property name="driverClass" value="${jdbc.driver}"></property>
<property name="user" value="${jdbc.username}"></property>
<property name="password" value="${jdbc.password}"></property>
</bean>
<!-- spring事务管理 -->
<bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 开启基于注解的事务 -->
<tx:annotation-driven transaction-manager="dataSourceTransactionManager"/>
<!--
整合mybatis
目的：1、spring管理所有组件。mapper的实现类。
service==>Dao @Autowired:自动注入mapper；
2、spring用来管理事务，spring声明式事务
-->
<!--创建出SqlSessionFactory对象 -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<!-- configLocation指定全局配置文件的位置 -->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!--mapperLocations: 指定mapper文件的位置-->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"></property>
</bean>
<!--配置一个可以进行批量执行的sqlSession -->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBean"></constructor-arg>
<constructor-arg name="executorType" value="BATCH"></constructor-arg>
</bean>
<!-- 扫描所有的mapper接口的实现，让这些mapper能够自动注入；
base-package：指定mapper接口的包名
-->
<mybatis-spring:scan base-package="com.atguigu.mybatis.dao"/>
<!--老版的配置-->
<!-- <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.atguigu.mybatis.dao"></property>
</bean> -->
</beans>
Controller
@Controller
public class EmployeeController {
@Autowired
EmployeeService employeeService;
@RequestMapping("/getemps")
public String emps(Map<String,Object> map){
List<Employee> emps = employeeService.getEmps();
map.put("allEmps", emps);
return "list";
}
}
Service
@Service
public class EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
@Autowired
private SqlSession sqlSession;
public List<Employee> getEmps(){
//
//EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
return employeeMapper.getEmps();
}
}
DAO
public interface EmployeeMapper {
public Employee getEmpById(Integer id);
public List<Employee> getEmps();
}
Mapper.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.atguigu.mybatis.dao.EmployeeMapper">
<!-- public Employee getEmpById(Integer id); -->
<select id="getEmpById" resultType="com.atguigu.mybatis.bean.Employee">
select * from tbl_employee where id=#{id}
</select>
<!--public List<Employee> getEmps(); -->
<select id="getEmps" resultType="com.atguigu.mybatis.bean.Employee">
select * from tbl_employee
</select>
</mapper>
jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>员工列表</title>
</head>
<body>
<table>
<tr>
<td>id</td>
<td>lastName</td>
<td>email</td>
<td>gender</td>
</tr>
<c:forEach items="${allEmps }" var="emp">
<tr>
<td>${emp.id }</td>
<td>${emp.lastName }</td>
<td>${emp.email }</td>
<td>${emp.gender }</td>
</tr>
</c:forEach>
</table>
</body>
</html>