json - Spring MVC @RequestBody JSON

Question

我收到一个错误，表明客户端发送的请求在语法上不正确。做错了什么？这是我的代码:

@Entity
@Table(name = "display")
public class Display  {
   private String diagonal;
   private String aspectRatio;
  //getter and setter
}



  $.ajax({
            type:'POST',
            url:'/admin/updateDisplay',
            data:{'diagonal':"sss"}
        })



@Controller
@RequestMapping(value = "/admin")
public class AdminController {

   @RequestMapping(value = "/updateDisplay", method = RequestMethod.POST)
   public String updateDisplay(@RequestBody Display display){

      System.out.print(display);
      return null;
   }

}

Answer 1

我认为您需要说明服务媒体类型将为 Spring 消耗什么才能知道如何解码它。大概 application/json .

@RequestMapping(value = "/updateDisplay", method = {RequestMethod.POST}, 
consumes = {"application/json"})

可能也有一些 Json 库，比如 Jackson。