myBatis系列之五：与Spring3集成

myBatis系列之五：与Spring3集成 


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