@Autowired private UserService userService; @RequestMapping("/addUser") public ReturnCodeUtil addUser(@RequestBody User user) { ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil(); if(null == user.getUserFlag()){ returnCodeUtil.setResult(false); return returnCodeUtil; } int res = this.userService.addUser(user); if (res>0) { returnCodeUtil.setResult(true); } else { returnCodeUtil.setResult(false); } return returnCodeUtil; } @RequestMapping("/register") public ReturnCodeUtil register(@RequestBody User user) { ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil(); if(user == null) { returnCodeUtil.setResult(false); return returnCodeUtil; } int res = this.userService.addUser(user); if(res>0){ returnCodeUtil.setResult(true); }else returnCodeUtil.setResult(false); return returnCodeUtil; }

可以将这两个方法中的重复代码提取出来，避免重复的代码出现。重构后的代码如下所示：

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @PostMapping("/add")
    public ResultVO addUser(@Validated @RequestBody User user) {
        return addUserOrRegister(user);
    }

    @PostMapping("/register")
    public ResultVO register(@Validated @RequestBody User user) {
        return addUserOrRegister(user);
    }

    private ResultVO addUserOrRegister(User user) {
        if (user == null || user.getUserFlag() == null) {
            return ResultVO.fail("参数错误");
        }
        userService.addUser(user);
        return ResultVO.success();
    }
}

通过提取公共方法，代码变得更加简洁易读，避免了重复代码的出现，提高了代码的可维护性和可扩展性。同时，使用统一的ResultVO返回格式，避免了使用ReturnCodeUtil。