spring中统一到前端的返回值

小灰灰 2022-05-24 09:19 50阅读 0赞

### spring中统一到前端的返回值 ###

在业务处理流程中抛出的异常，通过切面编程捕获后，给前端返回统一的消息格式

@ControllerAdvice
    public class ControllerExceptionHandler { 
    
        Logger logger = LoggerFactory.getLogger(getClass());
    
        @ExceptionHandler(TokenNullException.class)
        @ResponseBody
        public Result handle401(HttpServletRequest req, Exception e) {
            return new Result<String>(401,e.getMessage(),null);
        }
    
        @ResponseBody
        @ExceptionHandler(UserControllerException.class)
        public Result addUserWrong(HttpServletRequest req, Exception e) {
            return new Result<String>(-1,e.getMessage(),null);
        }
    
    }

在业务处理流程中抛出异常

@Transactional(propagation = Propagation.REQUIRED)
        @Override
        public User add(User user) {
            List<User> userList = this.findAll();
            for (User existUser : userList) {
                if (existUser.getLoginname().equals(user.getLoginname())) {
                    throw new UserControllerException("dup loginname");
                } else if (existUser.getUsername().equals(user.getUsername())) {
                    throw new UserControllerException("dup username");
                } else if (existUser.getWorkId().equals(user.getWorkId())) {
                    throw new UserControllerException("dup workid");
                }
            }
            if (!"男".equals(user.getFlagsex())&& !"女".equals(user.getFlagsex())) {
                throw new UserControllerException("性别必须是男或女");
            }
            int count = iDao.insert("User.insertSelective",user);
            if (count == 0) {
                throw new UserControllerException("insert failed");
            }
            return user;
        }