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小提示：别这样写，写个map在这里，谁知道这里面会传什么参数，后期很难维护，仅作为测试使用！
<>关于前端使用map去接收参数的问题
@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 }
<>正确封装姿势
@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; } }
// 结论：如果使用map接收前端参数，那么一定要加@Requestbody才行
#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); #正确封装姿势2 @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; } }
前端需要使用json传参格式：{ "dataMap":{ "name":"zzhua" } }
