mybatis与spring整合（基于配置文件）

本文主要介绍了如何将mybatis和spring整合在一起使用，本人使用的是mybatis3.05 + spring3.1.0M2 ，使用dbcp作为数据库连接池。

1.编写数据访问接口（UserDao.java）

package com.mybatis;public interface UserDao {    public int countAll();}

2.编写数据访问接口映射文件（UserDaoMapper.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.mybatis.UserDao">    <select id="countAll" resultType="int">        select count(*) c from user;    </select></mapper>

3.编写mybatis配置文件（MyBatis-Configuration.xml）

<?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>    <mappers>        <mapper resource="com/mybatis/UserDaoMapper.xml"/>    </mappers></configuration>

4.编写服务层接口（UserService.java）

package com.mybatis;

public interface UserService {    public int countAll();}

5.编写服务层实现代码（UserServiceImpl.java）

package com.mybatis;

public class UserServiceImpl implements UserService {    private UserDao userDao;

    public UserDao getUserDao() {        return userDao;    }    public void setUserDao(UserDao userDao) {        this.userDao = userDao;    }

    public int countAll() {        return this.userDao.countAll();    }}

6.编写spring配置文件（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"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>        <property name="url" value="jdbc:mysql://localhost:3306/hlp?useUnicode=true&amp;characterEncoding=UTF-8&amp;zeroDateTimeBehavior=convertToNull"></property>        <property name="username" value="root"></property>        <property name="password" value="1234"></property>        <property name="maxActive" value="100"></property>        <property name="maxIdle" value="30"></property>        <property name="maxWait" value="500"></property>        <property name="defaultAutoCommit" value="true"></property>    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="configLocation" value="classpath:MyBatis-Configuration.xml"></property>        <property name="dataSource" ref="dataSource" />    </bean>

    <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">        <property name="mapperInterface" value="com.mybatis.UserDao"></property>        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>    </bean>

    <bean id="userService" class="com.mybatis.UserServiceImpl">        <property name="userDao" ref="userDao"></property>    </bean>

</beans>

7.测试代码（UserServiceTest.java）

package com.mybatis;

import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;

public class UserServiceTest {

    @Test    public void userServiceTest(){        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");        UserService userService = (UserService)context.getBean("userService");        System.out.println(userService.countAll());    }}

附录：需要导入的库