Mybatis-Plus用法

依赖

       org.mybatis.spring.boot
       mybatis-spring-boot-starter
       2.2.2

配置

#       mybatis-plus控制台打印SQL语句
mybatis-plus:
  mapper-locations: classpath:/mapper/*.xml
  configuration:
    # 控制台打印执行SQL语句
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

#    扫描多层
mybatis-plus:
  mapper-locations: classpath*:/mapper/**/*Mapper.xml

新增

apiMappMapping.insert(mapping);

删除

        QueryWrapper queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("MAPPING_ID",dto.getId());
        apiMappMapping.delete(queryWrapper);

更新

        UpdateWrapper dtoWrapper = new UpdateWrapper<>();
        dtoWrapper.eq("ID",dto.getId());
        dataSetTransformDtoMapper.update(dto,dtoWrapper);

分页

//        分页条件
        Page page = new Page<>(current,pageSize);
//        条件构造器
        QueryWrapper wrapper = new QueryWrapper<>();
//        不为空 like模糊查询
        wrapper.like(StringUtils.isNotBlank(name),"NAME",name);
//        根据API_ID order by desc排序
        wrapper.orderByDesc("API_ID");
        IPage dataIPage = apiDataMapper.selectPage(page, wrapper);

分页嵌套另一张表集合

        Page page = new Page<>(current,pageSize);
        QueryWrapper wrapper = new QueryWrapper<>();
//      wrapper.like(StringUtils.isNotBlank(name),"NAME",name);
        wrapper.orderByDesc("ID");
        IPage dtoIPage = dataSetTransformDtoMapper.selectPage(page, wrapper);
//        遍历放入集合
        dtoIPage.getRecords().stream().forEach(item->{
            List mappingList = apiMappMapping.selectList(new QueryWrapper().eq("MAPPING_ID", item.getId()));
            item.setApiMappingList(mappingList);
        });