MyBatis学习24-mybatis和spring整合

1.整合思路

需要spring通过单例方式管理SqlSessionFactory。

spring和mybatis整合生成代理对象，使用SqlSessionFactory创建SqlSession。（spring和mybatis整合自动完成）

持久层的mapper都需要由spring进行管理。

2.整合环境的搭建

a.加入mybatis的jar包

b.加入spring的jar包

c.mybatis和Spring的整合包mybatis-spring-1.2.3

http://mvnrepository.com/artifact/org.mybatis/mybatis-spring/1.2.3

d.mysql驱动包

e.junit包

f.dbcp连接池包:

http://commons.apache.org/proper/commons-dbcp/download_dbcp.cgi

commons pool:

http://commons.apache.org/proper/commons-pool/download_pool.cgi

3.配置文件的编写

4.sqlSessionFactory

在applicationContext.xml配置sqlSessionFactory和数据源

sqlSessionFactory在mybatis和spring的整合包下:

<context:property-placeholder location="classpath:db.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxIdle" value="5" />

</bean>

5.原始DAO的开发（和Spring整合后）

mapper.xml

dao接口

applicationContext.xml配置如下：

<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.1.xsd ">

<context:property-placeholder location="classpath:db.properties" />
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxIdle" value="5" />
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 加载mybatis的配置文件 -->
<property name="configLocation" value="SqlMapConfig.xml" />
<!-- 数据源 -->
<property name="dataSource" ref="dataSource" />
</bean>

<bean id="userDao" class="dao.UserDaoImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>

</beans>

测试程序,测试成功。

package dao;

import org.junit.Test;

public class UserDaoImplTest {

private ApplicationContext applicationContext;

@Before
public void setUp() throws Exception {
applicationContext = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
}

@Test
public void testFindUserById() throws Exception {
UserDao userDao = (UserDao) applicationContext.getBean("userDao");
User user = userDao.findUserById(1);
System.out.println(user);
}
}