Spring扫描Mybatis的mapper接口的配置
1.前言
mybatis支持与spring结合使用，使得mybatis中的mapper接口可以作为spring容器中的bean被应用代码中相关类，如Service类，通过@Autowired自动注入进来。
在使用方面需要在项目中引入以下包：
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>2. 在spring中可以通过三种方式
来自动扫描获取应用代码的mybatis相关的mapper接口定义：
2.1在applicationContext.xml中使用<mybatis:scan />
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
...
<!-- mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:mybatis/mapper*.xml" />
<property name="configLocation" value="classpath:mybatis/mybitas-config.xml"
/>
</bean>
<mybatis:scan base-package="cn.cggeeker.dao"/>
...
</beans>2.2在applicationContext.xml中
使用bean标签注册MapperScannerConfigurer，即：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
...
<!-- mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:mybatis/mapper*.xml" />
<property name="configLocation" value="classpath:mybatis/mybitas-config.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="cn.cggeeker.dao" />
</bean>
...
</beans>2.3如果应用是使用Java配置方式而不是XML
则在@Configuration配置类使用@MapperScan或者@MapperScans注解：
@Configuration
@MapperScan("cn.cggeeker.dao")
public class AppConfig {
@Bean
public DataSource dataSource() {
return new PooledDataSource("com.mysql.jdbc.Driver",
"jdbc:mysql://localhost:3306/test", "root", "root");
}
@Bean
public SqlSessionFactory sqlSessionFactory() throws Exception {
SqlSessionFactoryBeansessionFactory = new SqlSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
return sessionFactory.getObject();
}
}Spring配置扫描mybatis的mapper文件注意
一般会将不业务的mapper文件放到不同的包中：
spring配置扫描就需要配置下面的方式（两个*）：
<!-- mybatis文件配置，扫描所有mapper文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
p:dataSource-ref="dataSource" p:configLocation="classpath:conf/mybatis-config.xml"
p:mapperLocations="classpath:mapper*.xml" />以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
