没有来自服务器的响应：不支持内容类型'null'

Question

我在尝试发送带有邮递员的某些参数的json对象的get get get get get get get get get get get get null'null'不支持的null'null'null'>

我应该获得该对象的ID接收JSON对象后的服务器端。

usercontroller：

package com.nust.QuizApplication.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.nust.QuizApplication.dao.UserDAO;
import com.nust.QuizApplication.model.User;
@Controller
@RequestMapping(value = "/users")
public class UserController {
    @Autowired
    private UserDAO userDao;

    @RequestMapping(value = "/signup" ,method = RequestMethod.GET, consumes = "application/json" )
    @ResponseBody
    public int create(@RequestBody User user) {
        int id = userDao.signupUser(user);
        if(id>0)
            return id;
        else
            return 0;
    }

    @RequestMapping(value = "/signin",method = RequestMethod.GET, consumes = "application/json" )
    @ResponseBody
    public boolean signinUser(@RequestBody User user) {
        boolean check = userDao.signinUser(user);
        if(check==true)
            return true;
        else
            return false;
    }
}

Answer 1

尝试使用@RequestParam而不是@RequestBody进行获取方法。喜欢

 public boolean signinUser(@RequestParam(value = "user", required = true) User user)