我尝试使用以下命令进行 API 调用post
通过邮递员的方法到我的 Spring Boot 应用程序。
这是输入:
{
"username": "name",
"password": "1234",
"age": 12,
"salary": 5000,
"role": 1
}
这是控制器中的代码:
@RequestMapping(value = "/signup", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<?> saveUser(@RequestBody UserDto user) {
try {
System.out.println(user.getUsername()); // => name
System.out.println(user.getPassword()); // => 1234
System.out.println(user.getSalary()); // => 5000
System.out.println(user.getRole()); // => 1
System.out.println(user.getAge()); // => 12
userService.save(user);
return ResponseEntity.ok().body("insert done");
} catch (Exception e) {
return ResponseEntity.badRequest().body(e.getMessage());
}
}
这是我的 User.java
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column
private String username;
@Column
@JsonIgnore
private String password;
@Column
private long salary;
@Column
private int age;
@ManyToOne(fetch = FetchType.LAZY, optional = false)
@JoinColumn(name = "role_id")
private Role role;
// getters and setters
这是我的 Role.java
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "role_name", nullable = false)
private String roleName;
// getters and setters
这是我的 UserDto.java
private String username;
private String password;
private int age;
private long salary;
private int role;
// getters and setters
这是我的 RoleDto.java
private Long id;
private String roleName;
// getters and setters
Problem: 会抛出错误'Column 'role_id' cannot be null'
这是在 userServiceImpl 中:
线下(BeanUtils
) 是指here http://appsdeveloperblog.com/dto-to-entity-and-entity-to-dto-conversion/.
@Override
public User save(UserDto user) throws Exception {
User newUser = new User();
BeanUtils.copyProperties(user, newUser, "password");
newUser.setPassword(bcryptEncoder.encode(user.getPassword()));
try {
userDao.save(newUser);
} catch (Exception e) {
throw new Exception(e);
// this throw "Column role_id cannot be null"
}
return newUser;
}
但是,如果我使用下面的代码,setRole
方法是not applicable
因为我定义user.getRole()
在 DTO 中为int
但定义newUser.setRole()
in the User
实体作为Role
。但如果我改变setRole
in User
实体作为int
,那么,我如何向 spring 讲述ManyToOne
之间的关系User
and Role
?
@Override
public User save(UserDto user) throws Exception {
User newUser = new User();
newUser.setUsername(user.getUsername());
newUser.setPassword(bcryptEncoder.encode(user.getPassword()));
newUser.setAge(user.getAge());
newUser.setSalary(user.getSalary());
newUser.setRole(user.getRole()); // here is the problem
try {
userDao.save(newUser);
} catch (Exception e) {
throw new Exception(e);
}
return newUser;
}
注意:我想我只想将输入参数设置为role
只是一个integer
如上所述。