springboot+mybatisPlus 配置多数据源--转载

https://blog.csdn.net/u012075383/article/details/79304178

踩坑记录，当自己需要写sql的时候，绑定Dao方法失败，原因是yml里面配置的xml扫面路径也要用java代码配置。

2020-09-08 23:29:16.717 [http-nio-8111-exec-9] INFO  com.test.system.config.DataSourceAspect - 切换到db1 数据源...
2020-09-08 23:29:16.729 [http-nio-8111-exec-9] ERROR org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/].[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.mdm.system.mapper.db1.ColumnInfoDao.getAllByList] with root cause
org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): com.test.system.mapper.db1.InfoDao.getAllByList

   at org.apache.ibatis.binding.MapperMethod$SqlCommand.<init>(MapperMethod.java:235) ~[mybatis-3.5.3.jar:3.5.3]
   at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.<init>(MybatisMapperMethod.java:50) ~[mybatis-plus-core-3.3.0.jar:3.3.0]
   at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.lambda$cachedMapperMethod$0(MybatisMapperProxy.java:101) ~[mybatis-plus-core-3.3.0.jar:3.3.0]
   at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1705) ~[?:?]

@Bean("sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory() throws Exception {
        MybatisSqlSessionFactoryBean sqlSessionFactory = new MybatisSqlSessionFactoryBean();
        sqlSessionFactory.setDataSource(multipleDataSource(db1(), db2()));
        sqlSessionFactory.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/mapper/*.xml"));

        MybatisConfiguration configuration = new MybatisConfiguration();
        configuration.setJdbcTypeForNull(JdbcType.NULL);
        configuration.setMapUnderscoreToCamelCase(true);
        configuration.setCacheEnabled(false);
        sqlSessionFactory.setConfiguration(configuration);
        //PerformanceInterceptor(),OptimisticLockerInterceptor()
        //添加分页功能
        sqlSessionFactory.setPlugins(new Interceptor[]{
                paginationInterceptor()
        });
//        sqlSessionFactory.setGlobalConfig(globalConfiguration()); //注释掉全局配置，因为在xml中读取就是全局配置
        return sqlSessionFactory.getObject();
    }

添加上黄色标记部分，就能成功读取到xml了。（yml部分失效了。）