基于controller使用map接收参数的注意事项

@PostMapping ( "test01" )

@ResponseBody                         // 如果这里不加@RequestBody，那么springmvc默认创建的是BindAwareModelMap

public Object test01( Map dataMap) { // 对象，并且都参数都不会封装进去

     System.out.println(dataMap);

     dataMap = null ;

     return new BindingAwareModelMap(); // 如果返回BindingAwareModelMap对象,就会抛出异常

}

@Controller

@RequestMapping ( "map" )

public class MapController {

     @PostMapping ( "test01" )

     @ResponseBody                                     // 如果加了@RequestBody，那么创建的是LinkedHashMap

     public Object test01( @RequestBody Map dataMap) { // 并且参数都封装了进去(url路径参数和json参数都会封装进去)

         System.out.println(dataMap);

         dataMap.put( "msg" , "ojbk" );

         return dataMap;

     }

}

#mybatis使用map封装参数，

@Select ( "select * from t_product where pid = #{pid} or pname = #{pname}" )

List<Product> getByMap(Map map);   

#mybatisplus中有写好的方法

List<T> selectByMap( @Param ( "cm" ) Map<String, Object> columnMap);

@Data

public class Page {

     private Map dataMap = new HashMap(); // 这里可以不用初始化，加了@RequestBody，默认创建LinkdedHashMap

}

@Controller

@RequestMapping ( "map" )

public class MapController {

     @PostMapping ( "test01" )

     @ResponseBody

     public Object test01( @RequestBody Page page) { // 一定要加@RequestBody，否则封装不进去

         return page;

     }

}

{

     "dataMap" :{

         "name" : "zzhua"

     }

}

@PostMapping ( "/xksq/getGjclByCondition" )

public ResultInfo getGjclByCondition( @RequestBody Map<String,Object> params,HttpServletRequest request){

     Map<String,Object> map = new HashMap<>();

     try {

         Integer iPageIndex = (Integer) params.get( "iPageIndex" );

         Integer iPageSize = (Integer) params.get( "iPageSize" );

         PageHelper.startPage(iPageIndex!= null ?iPageIndex: 1 ,iPageSize!= null ?iPageSize: 10 );

         String username = JwtUtil.getUsername(request.getHeader( "token" ));

         Rfgcgl user = rfgcglMapper.selectOne( new QueryWrapper<Rfgcgl>().eq( "YHMC" , username));

         if ( null ==user){

             return ResultInfo.fail( 903 , "用户不存在" );

         }

         params.put( "qynbbh" ,user.getQyNbBh());

         List<Map<String, Object>> gjclByCondition = clxxQysqMapper.getGjclByCondition(params);

         PageInfo<Map<String, Object>> pageInfo = new PageInfo<>(gjclByCondition);

         map.put( "total" ,pageInfo.getTotal());

         map.put( "datas" ,pageInfo);

         return ResultInfo.ok(map);

     } catch (Exception e){

         e.printStackTrace();

         return ResultInfo.fail( 901 , "列表条件查询失败" );

     }

}