Springboot mybais配置多数据源过程解析

@Configuration// 配置mybatis的接口类放的地方
@MapperScan(basePackages = "com.example.mybatis.mapper",sqlSessionFactoryRef = "sqlSessionFactoryOne")
public class DataSourceConfigOne {

  @Bean(name = "dataSourceOne")
  @Primary// 表示这个数据源是默认数据源
  // 读取application.properties中的配置参数映射成为一个对象,prefix表示参数的前缀
  @ConfigurationProperties(prefix = "spring.datasource.one")
  public DataSource dataSourceOne() {
    return DataSourceBuilder.create().build();
  }

  @Bean(name = "sqlSessionFactoryOne")
  @Primary
  public SqlSessionFactory sqlSessionFactoryOne(@Qualifier("dataSourceOne") DataSource datasource)throws Exception {
    SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
    bean.setDataSource(datasource);
    bean.setMapperLocations(
        // 设置mybatis的xml所在位置
        new PathMatchingResourcePatternResolver().getResources("classpath:mapper/*.xml"));    bean.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);return bean.getObject();
  }

  @Primary
  public SqlSessionTemplate sqlsessiontemplateOne(@Qualifier("sqlsessiontemplateOne") SqlSessionFactory sessionfactory) {
    return new SqlSessionTemplate(sessionfactory);
  }
}

@Configuration
@MapperScan(basePackages = "com.example.mybatis.mapper2",sqlSessionFactoryRef = "sqlSessionFactoryTwo")
public class DataSourceConfigTwo {
  @Bean(name = "dataSourceTwo")
  // 读取application.properties中的配置参数映射成为一个对象,prefix表示参数的前缀
  @ConfigurationProperties(prefix = "spring.datasource.two")
  public DataSource dataSourceTwo() {
    return DataSourceBuilder.create().build();
  }

  @Bean(name = "sqlSessionFactoryTwo")
  public SqlSessionFactory sqlSessionFactoryTwo(@Qualifier("dataSourceTwo") DataSource datasource)throws Exception {
    SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
    bean.setDataSource((javax.sql.DataSource) datasource);
    bean.setMapperLocations(
        // 设置mybatis的xml所在位置
        new PathMatchingResourcePatternResolver().getResources("classpath:mapper2/*.xml"));    bean.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);
    return bean.getObject();
  }

  public SqlSessionTemplate sqlsessiontemplateTwo(@Qualifier("sqlsessiontemplateTwo") SqlSessionFactory sessionfactory) {
    return new SqlSessionTemplate(sessionfactory);
  }
}