myBatis系列之五：与Spring3集成

myBatis系列之一：搭建开发环境
myBatis系列之二：以接口方式交互数据
myBatis系列之三：增删改查
myBatis系列之四：关联数据的查询
myBatis系列之六：与SpringMVC集成
myBatis系列之七：事务管理


Spring作为基础框架，可以集成后端框架，如Hibernate，MyBatis等。

前面是介绍单独使用MyBatis的，大致逻辑是：
sqlSessionFactory <- configuration file (包括数据库连接配置)
IXxxMapper <- sqlSession <- sqlSessionFactory
                     <- mapper interface <- mapper xml
得到IxxMapper后，就可以调用其方法进行数据交互了。

和Spring集成时，上面的这些对象需要作为bean来管理：
dataSource bean <- 数据库连接配置
sqlSessionFactory bean <- dataSource
                                     <- configuration file
userMapper bean <- sqlSessionFactory
                          <- mapper interface

1. 在pom.xml中加入依赖：

  <properties>
    <mybatis.spring.version>1.2.1</mybatis.spring.version>
    <dbcp.version>1.4</dbcp.version>
    <spring.version>3.1.2.RELEASE</spring.version>
  </properties>

  <dependencies>
    <dependency><!-- mybatis的几个对象包装成spring的bean -->
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis.spring.version}</version>
    </dependency>
    <dependency><!-- spring上下文用spring-jdbc连接数据库 -->
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency><!-- dataSource是BasicDataSource的实例 -->
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>${dbcp.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
  </dependencies>

2. 在类路径下创建beans-da.xml文件：

<?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.xsd">

  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"><!-- 数据库连接bean -->
  	<property name="driverClassName" value="com.mysql.jdbc.Driver" />
	<property name="url" value="jdbc:mysql://localhost:3306/hbatis?characterEncoding=utf8" />
	<property name="username" value="root" />
	<property name="password" value="123456" />
  </bean>
  
  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!-- sqlSessionFactory bean -->
  	<property name="dataSource" ref="dataSource" /><!-- 数据源 -->
	<property name="configLocation" value="classpath:Configuration.xml" /><!-- 配置文件 -->
  </bean>
  
  <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"><!-- user映射bean-->
	<property name="sqlSessionFactory" ref="sqlSessionFactory" />
  	<property name="mapperInterface" value="com.john.hbatis.mapper.IUserMapper" /><!-- 映射接口 -->
  </bean>
</beans>

3. 测试类：

@ContextConfiguration(locations = { "classpath:beans-da.xml" })
public class SpringIntegrationTest extends AbstractTestNGSpringContextTests {
	private static final Logger log = LoggerFactory.getLogger(SpringIntegrationTest.class);
	
	@Resource
	IUserMapper mapper;
	
	@Test
	public void queryTest() {
		User user = mapper.getUserById(1);
		log.info("Name: {}, address: {}", user.getName(), user.getAddress());
	}
}

参考：
http://www.yihaomen.com/article/java/309.htm