spring整合myBatis

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mb5fed6fc050005 2014-02-25 09:46:00

整合spring与myBatis之前，需要测试myBatis与数据库之间的链接，至少我喜欢这样做，参考上一篇文章，这次整合也是基于上一篇文章的！

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项目的源码和jar包可以去我的资源下载

整合之前需要jar包，网上搜一搜，本次用：spring 3.0.1 + myBatis 3.0 + mybatis-spring 1.0

整个项目的一个结构：

说明：

UserMapper:dao接口 userMapper.xml是myBatis针对dao接口的实现

Entity不用管、user是实体类、

IuserService 是service接口 UserService是针对service接口的实现

SpringTest 是针对本次整合的一个测试类

ApplicationContext-mapper.xml 是myBatis的配置文件信息

ApplicationContext-service.xml 是spring配置文件信息

ApplicationContext.xml是spring的配置文件信息

我主张配置文件能分类就分类，要不然写到一块乱、难维护！

下就说说主要整合部分，其他的在上一章有说明，请参考：

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service接口：

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接口实现：

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ApplicationContext.xml配置文件内容：

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<?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:p="http://www.springframework.org/schema/p"
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.ibm.db2.jcc.DB2Driver"></property>
<property name="url" value="jdbc:db2://localhost:50000/forum"></property>
<property name="username" value="DB2ADMIN"></property>
<property name="password" value="admin"></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:configuration.xml"></property>
<property name="dataSource" ref="dataSource" />
</bean>
<import resource="applicationContext-*.xml"/>
</beans>

整合的时候我把数据库配置文件放到了spring管理，上次是放在myBatis的configuration.xml中的；

这次的configuration.xml中清减到只配置myBatis的别名和mapper如下所示：

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ApplicationContext-mapper.xml这个文件主要是把myBatis的dao实现放进来：

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<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="userMapper" class="org.mybatis.spring.MapperFactoryBean">
<property name="mapperInterface" value="com.forum.dao.UserMapper"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
</beans>

Application—service.xml主要是将service接口注入进来，文件内容如下：

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<?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:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="userService" class="com.forum.service.impl.UserServiceImpl">
<property name="userMapper" ref="userMapper"></property>
</bean>
</beans>

测试类：springTest:

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package com.forum.test;
import junit.framework.TestCase;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.forum.po.User;
import com.forum.service.IUserService;
public class SpringTest extends TestCase {
@Test
public void testSpring(){
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
IUserService userService = (IUserService) applicationContext.getBean("userService");
User user = userService.findById("1");
System.out.println(user.getName());
}
}