SpringCloud MybatisPlus多数据源 Invalid bound statement (not found)

There are many ways to configure multiple data sources to connect to the database. Two common ones are briefly introduced:

1. The first way

MybatisPlus comes with multiple data source functions:

Use  @DS  to switch data sources

@DS  can be annotated on methods or classes, and there is a principle of proximity. Method annotations take precedence over class annotations .

annotation	result
No @DS	Default data source
@DS("dsName")	dsName can be a group name or a specific library name

@Service
@DS("slave")
public class UserServiceImpl implements UserService {

  @Autowired
  private JdbcTemplate jdbcTemplate;

  public List selectAll() {
    return  jdbcTemplate.queryForList("select * from user");
  }
  
  @Override
  @DS("slave_1")
  public List selectByCondition() {
    return  jdbcTemplate.queryForList("select * from user where age >10");
  }
}

 This method feels more cumbersome to match, and each class that needs to be sub-library needs to be configured.

2. The second way

Configure data source (mybatis configuration method)

@Configuration
@MapperScan(basePackages = "com.*.dao", sqlSessionTemplateRef = "serviceSqlSessionTemplate")
public class ServiceDataSourceConfig {

    @Bean("serviceDataSource")
    @ConfigurationProperties("spring.datasource.service")
    public HikariDataSource dataSource() {
        return new HikariDataSource();
    }

    /**
     * 创建SessionFactory
     */
    @Bean(name = "serviceSqlSessionFactory")
    public SqlSessionFactory serviceSqlSessionFactory(@Qualifier("serviceDataSource") DataSource dataSource) throws Exception {
        SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //设置mapper配置文件
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:sqlmap/*.xml"));
        return bean.getObject();
    }

    /**
     * 创建事务管理器
     */
    @Bean("serviceTransactionManger")
    public DataSourceTransactionManager serviceTransactionManger(@Qualifier("serviceDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 创建SqlSessionTemplate
     */
    @Bean(name = "serviceSqlSessionTemplate")
    public SqlSessionTemplate serviceSqlSessionTemplate(@Qualifier("serviceSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

Configure data source (MybatisPlus configuration method)

@Configuration
@MapperScan(basePackages = "com.*.dao", sqlSessionTemplateRef = "serviceSqlSessionTemplate")
public class ServiceDataSourceConfig {

    @Bean
    @ConfigurationProperties("spring.datasource.service")
    public HikariDataSource serviceDataSource() {
        return new HikariDataSource();
    }

    /**
     * 创建SessionFactory
     */
    @Bean
    @Primary
    public SqlSessionFactory serviceSqlSessionFactory(@Qualifier("serviceDataSource") DataSource dataSource) throws Exception {
        MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
        bean.setDataSource(dataSource);
        //设置mapper配置文件
        bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:sqlmap/*.xml"));
        return bean.getObject();
    }

    /**
     * 创建事务管理器
     */
    @Bean
    @Primary
    public DataSourceTransactionManager serviceTransactionManger(@Qualifier("serviceDataSource") DataSource dataSource) {
        return new DataSourceTransactionManager(dataSource);
    }

    /**
     * 创建SqlSessionTemplate
     */
    @Bean
    @Primary
    public SqlSessionTemplate serviceSqlSessionTemplate(@Qualifier("serviceSqlSessionFactory") SqlSessionFactory sqlSessionFactory) {
        return new SqlSessionTemplate(sqlSessionFactory);
    }
}

The difference is that when creating the SessionFactory,

my shoe：

SqlSessionFactoryBean

MybatisPlus：

MybatisSqlSessionFactoryBean

If you use MybatisPlus, the data source is equipped with SqlSessionFactoryBean,

Then it will report Invalid bound statement (not found)