目录
- 后端:
- 前端登录页面以及AJAX的测试用例:
- 测试:
- 总结
前提是前端必须有接收后端信息的载体:比如:ajax的异步接收等等。
后端:
编写后端的统一返回信息类:
/** * 后端统一返回结果 * @param <T> */ @Data public class Result<T> implements Serializable { private Integer code;//1成功,0和其他数字为失败。 private String msg;//错误信息 private T data;//数据 public static <T> Result<T> success(){ Result<T> result = new Result<T>(); result.code=1; return result; android} public static <T> Result<T> success(T object){ Result<T> result = new Result<T>(); result.data=object; result.code=1; return result; } public static <T>编程客栈; Result<T> error(String msg){ Result<T> result = new Result<T>(); result.code=0; result.msg=msg; return result; } }
异常基础类:
/** * 业务异常 */ public class BaseException extends RuntimeException{ public BaseException(String message) { super(message); } public BaseException() { } }
账号不存在异常:
/** * 账号不存在异常 */ public class AccountNotFoundException extends BaseException { public AccountNotFoundException() { } public AccountNotFwww.devze.comoundException(String msg) { super(msg); } }
账号密码为空异常:
/** * 账号密码为空 */ public class InputAccountAndPassword extends BaseException{ public InputAccountAndPassword(String message) { super(message); } }
登录失败异常:
/** * 登录失败 */ public class LoginFailedException extends BaseException{ public LoginFailedException(String msg){ super(msg); } }
密码错误:
/** * 密码错误异常 */ public class PasswordErrorException extends BaseException { public PasswordErrorException() { } public PasswordErrorException(String msg) { super(msg); } }
全局异常类:
/** * 全局异常处理 */ //@ControllerAdvice(annotations = {RestController.class,Controller.class}) //@ResponseBody @Slf4j @RestControllerAdvice public class GlobalExceptionHandler { /** * 业务异常 * @param ex 异常信息 * @return 封装、抛出给前端 */ @ExceptionHandler public Result<String> exceptionHandler(BaseException ex){ log.error(ex.getMessage()); return Result.error(ex.getMessage()); } @ExceptionHandler public Result<String> exceptionHandler(ExpiredJwtException ex){ String message=ex.getMessage(); if (message.contains("expired")){ return Result.error("登录过期!"); } return null; } }
举例:
登录的服务
@Service @Slf4j public class LoginServiceImpl implements LoginService { @Autowired(required = false) private LoginMapper loginMapper; /** * 用户登录 * @param user 用户 */ public void userLogin(User user) { String email = user.getEmail(); String password = user.getPassword(); if (email.isEmpty() || password.isEmpty()) { //账号密码为空 throw new InputAccountAndPassword(MessageConstant.ACCOUNT_PASSWORD_EMPTY); } //账号密码不为空 else { //验证账号 int i = loginMapper.userExist(email); //账号存在 if (i > 0) { //验证密码 int p = loginMapper.loginCheck(email, password); //密码正确 if (p == 1) { //准许登录 state==1 loginMapper.login(email); } else { //密码错误 throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR); } } //账号不存在 else { throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND); } } } }
异常提示常量类MessageConstant:
/** * 信息提示常量类 */ public class MessageConstant { public static final String PASSWORD_ERROR = "密码错误"; public static final String ACCOUNT_NOT_FOUND = "账号不存在"; public static final String LOGIN_FAILED = "登录失败"; public static final String ACCOUNT_PASSWORD_EMPTY="请输入账号和密码"; }
控制端:
@RestController @RequestMapping("/login") @Slf4j public class LoginController { @Autowired(required = false) private LoginService loginService; @Autowired private JwtProperties jwtProperties; @PostMapping("/userlogin") public Result login(@RequestBody User user){ log.info("开始登录:email:{},password:{}",user.getEmail(),user.getPassword()); log.info("{}",user); loginService.userLogin(user); //登录成功后,生成jwt令牌 Map<String, Object>claims=new HashMap<>(); claims.put("userId",1L); claims.put("email",user.getEmail()); String token= JwtUtil.createJWT( jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), claims); UserDTO userDTO = new UserDTO(); userDTO.setToken(token); log.info("生成的token是:{}",token); return Result.success(userDTO); } }
前端登录页面以及ajax的测试用例:
<!DOCTYPE html> <html lang="en" XMLns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"> php <title>欢迎登录公司员工考勤管理平台</title> <link rel="shortcut icon" th:href="@{/images/icon.svg}" rel="external nofollow" > <link rel="stylesheet" type="text/css" th:href="@{/css/bootstrap.css}" rel="external nofollow" > <script th:src="@{/js/jquery-3.2.1.js}"></script> <script th:src="@{/js/token.js}"></script> <script type="text/Javascript"> $(function () { let token=null; //登录按钮 $("#login").click(function () { let email=$('#email').val(); let password=$('#password').val(); $.ajax({ type:"post", url:"/login/userlogin", contentType:"application/json", data:JSON.stringify({"emailgimRWYQY":email,"password":password}), success:function (result) { if (result.code===1){ token=result.data.token; alert("登录成功"); // 收到Token,开始存储token localStorage.setItem('token',token); alert("token值为:"+token+"!"); //返回Token给后端 //返回后端 location.href="/main" rel="external nofollow" ;//也会经过拦截器 }else { alert(result.msg); } } }); }); $("#registry").click(function () { location.href="/registry" rel="external nofollow" }) }) </script> </head> <body> <div> <h2>登录页面</h2> </div> <div> <label for="email"></label><input type="text" id="email" name="email" placeholder="E-mail address"> </div> <div> <label for="password"></label><input type="password" id="password" name="password" placeholder="Password"/> </div> <button id="login">登录</button> <button id="registry">注册</button> </body> </html>
测试:
账号密码不为空:
后台:
账号不存在:
后台:
密码错误:
后台:
还有很多其他的情况......
Tips:其实有些情况可以直接在前端判断,没有必要全部都给到后台判断,这样会造成后台压力比较大;比如密码账号不为空,账号格式等等。
总结
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