mybatis与spring整合（基于配置文件）

elixiat

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());
}
}