SpringBoot+Mybatis加载Mapper.xml文件的两种方式
前言:我们在平常工作中用到mybatis去加载Mapper.xml文件,可能mapper文件放的路径不一样,由此我们需要配置多个路径,幸运的是Mybatis支持我们配置多个不同路径。现在介绍两种方法。
最近在整合shardingsphere 用到所以总结一下。
一、配置文件:
SpringBoot和Mybatis整合已经天然支持这种方式,只需要在配置文件添加多个路径用逗号隔开
mybatis: mapper-locations: classpath*:com/pab/cc/fas/mapper/*Mapper*.xml,classpath*:com/pab/cc/ces/mapper/*Mapper*.xml,classpath*:com/pab/cc/ams/mapper/*Mapper*.xml type-aliases-package: com.urthink.upfs.springbootmybatis.entity #IDENTITY: MYSQL #取回主键的方式 #notEmpty: false #insert和update中,是否判断字符串类型!='' configuration: #进行自动映射时,数据以下划线命名,如数据库返回的"order_address"命名字段是否映射为class的"orderAddress"字段。默认为false map-underscore-to-camel-case: true # 输出SQL执行语句 (log4j2本身可以输出sql语句)
二、Javabean配置
主要用到的是SqlSessionFactoryBean的setMapperLocations(),这个方法需要传入resource数组。
public SqlSessionFactory sqlSessionFactory() { SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean(); sqlSessionFactoryBean.setDataSource(dataSourceOne()); sqlSessionFactoryBean.setMapperLocations(resolveMapperLocations()); return sqlSessionFactoryBean.getObject(); } public Resource[] resolveMapperLocations() { ResourcePatternResolver resourceResolver = new PathMatchingResourcePatternResolver(); List<String> mapperLocations = new ArrayList<>(); mapperLocations.add("classpath*:com/pab/cc/fas/mapper/*Mapper*.xml"); mapperLocations.add("classpath*:com/pab/cc/ces/mapper/*Mapper*.xml"); mapperLocations.add("classpath*:com/pab/cc/ams/mapper/*Mapper*.xml"); List<Resource> resources = new ArrayList(); if (mapperLocations != null) { for (String mapperLocation : mapperLocations) { try { Resource[] mappers = resourceResolver.getResources(mapperLocation); resources.addAll(Arrays.asList(mappers)); } catch (IOException e) { // ignore } } } return resources.toArray(new Resource[resources.size()]); }
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