mybatis-plus多表查询操作方法

    <!-- 查询超管列表 -->
  <select id="managerList" resultType="map" >
     SELECT m.*,r.rolename FROM 
         tbl_manager_info m
        INNER JOIN 
           tbl_role_info  r
         ON 
           m.account=r.account
         AND 
           m.type='0'
           <if test="account!=null and account!='' ">
              AND m.account=#{account}
           </if>
          ORDER BY 
             m.createdtime 
           DESC
  </select>

    public interface ManagerMapper extends BaseMapper<TblManagerInfo>{
	//查询超管列表
	public List<Map<String,Object>> managerList(Pagination page,Map<String,Object> params) throws Exception;

public interface ManagerService extends IService<TblManagerInfo>{
	//查询超管列表
	public Page<Map<String,Object>> managerList(Page<Map<String,Object>> page,Map<String,Object> params)throws Exception;
}

@Service
public class ManagerServiceImpl  extends ServiceImpl<ManagerMapper, TblManagerInfo> implements ManagerService {
	@Autowired
	private ManagerMapper managerDao;
	@Override
	public Page<Map<String, Object>> managerList(
			Page<Map<String, Object>> page, Map<String, Object> params)
			throws Exception {
		  return page.setRecords(managerDao.managerList(page, params));
	}
}

  //超管列表
	@RequestMapping("/admin/queryManagerList")
	@ResponseBody
	public ResultVo queryManagerList(HttpServletResponse response,HttpServletRequest request,
			@RequestParam("page") Integer pageNo,
			@RequestParam("limit") Integer pageSize,
			@RequestParam(value="account",defaultValue="")String account
			) throws Exception{
		//这是我自己定义的封装类，返回前端的整和
		ResultVo rv=ResultVo.getResultVo();
		try {
			Map<String,Object> params=new WebUtils().getMap();
			params.put("account", account);
            //这个位置开始调用
			Page<Map<String,Object>> page=new Page<Map<String,Object>>(pageNo, pageSize);
			managerService.managerList(page,params);//这里就得到数据了
			rv.setCount(page.getTotal());//往封装类存入数据量
			rv.setData(page.getRecords());//往封装类存入数据
			rv.setCode("0");
		} catch (Exception e) {
			rv.setCode("1");
			e.printStackTrace();
		}
		return rv;
	}