@RequestBody获取参数值null

Question

我正在开发一个rest API，但是它提供了null与@RequestBody。我翻阅了这个平台上的答案，但是并没有解决我的问题。我无法找到问题所在。我想通过验证userEmail和userPassword来验证用户，但是没有成功。

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@RestController
@RequestMapping("user")
public class UserController {
    @Autowired
    private IUserService userService;

    @GetMapping("validateUser")
    public ResponseEntity<Boolean> validateUser(@RequestBody Users user) {
        boolean validateStatus = userService.validateUser(user.getUserEmail(), user.getUserPassword());
        if (validateStatus)
            return new ResponseEntity<Boolean>(validateStatus, HttpStatus.OK);
        else
            return new ResponseEntity<Boolean>(validateStatus, HttpStatus.UNAUTHORIZED);

    }

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和pojo类是这样的。

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    package com.ravionics.user.entity;    
    import java.io.Serializable;    
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.GeneratedValue;
    import javax.persistence.GenerationType;
    import javax.persistence.Id;
    import javax.persistence.Table;

    @Entity
    @Table(name="users")
    public class Users implements Serializable {
        private static final long serialVersionUID = 1L;
        @Id
        @GeneratedValue(strategy=GenerationType.AUTO)
        @Column(name="user_Id")
        private int userId;  
        @Column(name="user_Name")
        private String userName;
        @Column(name="user_Email")  
        private String userEmail;
        @Column(name="user_Password")
        private String userPassword;

        public int getUserId() {
            return userId;
        }
        public void setUserId(int userId) {
            userId = userId;
        }
        public String getUserName() {
            return userName;
        }
        public void setUserName(String userName) {
            userName = userName;
        }
        public String getUserEmail() {
            return userEmail;
        }
        public void setUserEmail(String userEmail) {
            userEmail = userEmail;
        }
        public String getUserPassword() {
            return userPassword;
        }
        public void setUserPassword(String userPassword) {
            userPassword = userPassword;
        }       

    }

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