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;

publicinterface UserDao {

    publicint 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;


publicinterface UserService {

    publicint countAll();

}

5.编写服务层实现代码（UserServiceImpl.java）

package com.mybatis;


publicclass UserServiceImpl implements UserService {

    private UserDao userDao;


    public UserDao getUserDao() {

        return userDao;

    }

    publicvoid setUserDao(UserDao userDao) {

        this.userDao = userDao;

    }

    

    publicint countAll() {

        returnthis.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&
        characterEncoding=UTF-8&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;



publicclass UserServiceTest {

    

    @Test

    publicvoid userServiceTest(){

        ApplicationContext context = new ClassPathXmlApplicationContext 
                                        ("applicationContext.xml");

        UserService userService = (UserService)context.getBean("userService");

        System.out.println(userService.countAll());

    }

}