编辑/更新 Java Spring

Question

所以我能够创建一个新用户，但我卡住了。如果我想更新某个用户的电子邮件怎么办？我正在创建带有保存的用户。有没有办法像这样更新它吗？

public User update(@RequestBody User user)

'

@ResponseBody
@PostMapping(value = "/api/users/create")
@ResponseStatus(HttpStatus.CREATED)
public User create(@RequestBody User user) {
User newUser = new User();
newUser.setUsername(user.getUsername());
newUser.setEmail(user.getEmail());
newUser.setPassword(bCryptEncoder.encode(user.getPassword()));
user_dao.save(newUser);
return newUser;
}

Answer 1

在服务中放置(覆盖(更新用户的方法，如下所示：

public void updateUser(User user) {
User entity = userRepository.findById(user.getId()).orElse(null);
//Check if the intended record exists. If exists, update it..
if (entity != null) {
System.out.println("nUpdating User- " + user.getUsername() + "n");
entity.setUsername(user.getUsername());
entity.setUseremail(user.getUseremail());
entity.setPassword(bCryptPasswordEncoder.encode(user.getPassword()));
}
// And finally save it...
userRepository.save(entity);
}