springboot(二) 设置Mybatis和Spring Boot整合
Mybatis和Spring Boot的整合有两种方式:
第一种:使用mybatis官方提供的Spring Boot整合包实现,地址:https://github.com/mybatis/spring-boot-starter
第二种:使用mybatis-spring整合的方式,也就是我们传统的方式
这里我们推荐使用第二种,因为这样我们可以很方便的控制Mybatis的各种配置。
首先,创建一个Mybatis的配置类:
代码:
import javax.sql.DataSource;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
@Configuration
public class MyBatisConfig {
@Bean
@ConditionalOnMissingBean //当容器里没有指定的Bean的情况下创建该对象
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
// 设置数据源
sqlSessionFactoryBean.setDataSource(dataSource);
// 设置mybatis的主配置文件
ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
Resource mybatisConfigXml = resolver.getResource("classpath:mybatis/mybatis-config.xml");
sqlSessionFactoryBean.setConfigLocation(mybatisConfigXml);
// 设置别名包
sqlSessionFactoryBean.setTypeAliasesPackage("com.taotao.cart.pojo");
return sqlSessionFactoryBean;
}
}
然后,创建Mapper接口的扫描类MapperScannerConfig:
代码:
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@AutoConfigureAfter(MyBatisConfig.class) //保证在MyBatisConfig实例化之后再实例化该类
public class MapperScannerConfig {
// mapper接口的扫描器
@Bean
public MapperScannerConfigurer mapperScannerConfigurer() {
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setBasePackage("com.taotao.cart.mapper");
return mapperScannerConfigurer;
}
}