手动配置springboot+mybaits

版权声明：转载请注明作者 https://blog.csdn.net/myth_g/article/details/86230849

1.配置数据库连接池:

@Bean
    @Primary
    public DataSource dataSource(){
        PooledDataSource dataSource = new PooledDataSource();
        dataSource.setDriver("org.postgresql.Driver");
        dataSource.setUsername("postgres");
        dataSource.setPassword("123456");
        dataSource.setUrl("jdbc:postgresql://localhost:5432/test");
        return dataSource;
    }    

该处用的mybaits的默认连接池,也可以用druid等;

2.配置sqlSessionFactory数据库会话工厂:

@Bean
    public SqlSessionFactory sqlSession() throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource());
        org.apache.ibatis.session.Configuration configuration = new org.apache.ibatis.session.Configuration();
        configuration.setMapUnderscoreToCamelCase(true);
        configuration.setLogImpl(StdOutImpl.class);
        bean.setConfiguration(configuration);
        bean.setTypeAliasesPackage("com.example.demo.entity");
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/mapper/*.xml"));
        return bean.getObject();
    }

该处设置了下划线字段名自动匹配驼峰;

扫描实体类包为别名,resultType可以直接写实体类首字母手写名称;

配置扫面xml地址(如果xml写在src中则maven编译无法找到资源,需要在pom中配置扫描)

配置打印sql语句:org.apache.ibatis.logging.stdout是Log接口实现类,能打印出sql详细信息;也可以使用:

#logging.level.com.example.demo.mapper=debug

不过无法打印出sql结果

3.配置自动扫描mapper类:

 @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer m = new MapperScannerConfigurer();
        m.setBasePackage("com.example.demo.mapper");
        m.setSqlSessionFactoryBeanName("sqlSession");
        return m;
    }