<!-- JWT-->
<dependency>
 <groupId>io.jsonwebtoken</groupId>
 <artifactId>jjwt</artifactId>
</dependency>

public class JwtUtils {

 //token過期時間
 public static final long EXPIRE = 1000 * 60 * 60 * 24;
 //秘鑰
 public static final String APP_SECRET = "ukc8BDbRigUDaY6pZFfWus2jZWLPHO";

 public static String getJwtToken(String id, String nickname){

  String JwtToken = Jwts.builder()
    //設置頭信息
    .setHeaderParam("typ", "JWT")
    .setHeaderParam("alg", "HS256")
    .setSubject("user")
    .setIssuedAt(new Date())
    //設置過期時間
    .setExpiration(new Date(System.currentTimeMillis() + EXPIRE))
    //設置token主體部分（這里使用id和nickname作為主體部分）
    .claim("id", id)
    .claim("nickname", nickname)
    //加密方式
    .signWith(SignatureAlgorithm.HS256, APP_SECRET)
    .compact();

  return JwtToken;
 }

 /**
  * 判斷token是否存在與有效（直接通過APP_SECRET解析token）
  * @param jwtToken
  * @return
  */
 public static boolean checkToken(String jwtToken) {
  if(StringUtils.isEmpty(jwtToken)) return false;
  try {
   Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
  } catch (Exception e) {
   e.printStackTrace();
   return false;
  }
  return true;
 }

 /**
  * 判斷token是否存在與有效（通過獲取請求頭信息獲取token再使用APP_SECRET解析token）
  * @param request
  * @return
  */
 public static boolean checkToken(HttpServletRequest request) {
  try {
   String jwtToken = request.getHeader("token");
   if(StringUtils.isEmpty(jwtToken)) return false;
   Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
  } catch (Exception e) {
   e.printStackTrace();
   return false;
  }
  return true;
 }

 /**
  * 根據token字符串獲取用戶id（取出有效載荷中的用戶信息）
  * @param request
  * @return
  */
 public static String getMemberIdByJwtToken(HttpServletRequest request) {
  String jwtToken = request.getHeader("token");
  if(StringUtils.isEmpty(jwtToken)) return "";
  Jws<Claims> claimsJws = Jwts.parser().setSigningKey(APP_SECRET).parseClaimsJws(jwtToken);
  Claims claims = claimsJws.getBody();
  return (String)claims.get("id");
 }
}

@RestController
@RequestMapping("/user/")
@CrossOrigin
public class UcenterMemberController {

 @Autowired
 private UcenterMemberService ucenterMemberService;
	//登錄
 @PostMapping("login")
 public ResponseResult login(@RequestBody MobileLoginRequest request) {
  String token = ucenterMemberService.login(request);
  return ResponseResult.success().data("token", token);
 }
	//注冊
 @PostMapping("register")
 public ResponseResult register(@RequestBody RegisterRequest request) {
  ucenterMemberService.register(request);
  return ResponseResult.success().message("注冊成功");
 }
	//根據token獲取用戶信息
 @GetMapping("getUserInfo")
 public ResponseResult getUserInfo(HttpServletRequest request) {
  //調用jwt工具類的方法，根據request對象獲取頭信息，返回用戶id
  String id = JwtUtils.getMemberIdByJwtToken(request);
  //根據用戶id查詢用戶
  UcenterMember member = ucenterMemberService.getById(id);
  return ResponseResult.success().data("userInfo", member);
 }

}

@Service
public class UcenterMemberServiceImpl extends ServiceImpl<UcenterMemberMapper, UcenterMember> implements UcenterMemberService {

 @Autowired
 private StringRedisTemplate redisTemplate;

	//登錄
 @Override
 public String login(MobileLoginRequest request) {

  String phone = request.getPhone();
  String password = request.getPassword();
  if (StrUtil.isBlank(phone) || StrUtil.isBlank(password)) {
   throw new GuliException(200001, "請輸入用戶名或者密碼");
  }
  //根據輸入的手機號碼查找該用戶信息
  UcenterMember ucenterByPhone = this.baseMapper.selectOne(new LambdaQueryWrapper<UcenterMember>().eq(UcenterMember::getMobile, phone));
  if (ucenterByPhone == null) {
   throw new GuliException(200002, "該用戶名不存在");
  }
  //如果用戶存在比對數據庫密碼和用戶輸入的密碼
  if (!MD5Util.encrypt(password).equals(ucenterByPhone.getPassword())) {
   throw new GuliException(200003, "密碼輸入錯誤");
  }
  String token = JwtUtils.getJwtToken(ucenterByPhone.getId(), ucenterByPhone.getNickname());
  return token;
 }

	//注冊
 @Override
 public void register(RegisterRequest request) {
  String phone = request.getPhone();
  String password = request.getPassword();
  String nickName = request.getNickName();
  String code = request.getCode();
  if (StrUtil.isBlank(phone) || StrUtil.isBlank(password) || StrUtil.isBlank(nickName) || StrUtil.isBlank(code)) {
   throw new GuliException(200001, "請?zhí)顚懴嚓P信息");
  }
  //判斷手機號是否重復
  Integer count = baseMapper.selectCount(new LambdaQueryWrapper<UcenterMember>().eq(UcenterMember::getMobile, phone));
  if (count > 0) {
   throw new GuliException(200001, "賬號已經存在請重新輸入");
  }
  //驗證code
  String redisCode = redisTemplate.opsForValue().get(phone);
  if (StrUtil.isBlank(redisCode)) {
   throw new GuliException(200001, "驗證碼已經過期，請重新獲取");
  }
  if (!redisCode.equals(code)) {
   throw new GuliException(200001, "驗證碼錯誤");
  }

  UcenterMember ucenterByPhone = new UcenterMember();
  ucenterByPhone.setMobile(phone);
  ucenterByPhone.setPassword(MD5Util.encrypt(password));
  ucenterByPhone.setNickname(nickName);
  ucenterByPhone.setIsDisabled(false);
  int insert = baseMapper.insert(ucenterByPhone);
  if(insert<=0){
   throw new GuliException(20001,"注冊失敗");
  }
 }
}

public final class MD5Util {

 public static String encrypt(String strSrc) {
  try {
   char hexChars[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8',
     '9', 'a', 'b', 'c', 'd', 'e', 'f'};
   byte[] bytes = strSrc.getBytes();
   MessageDigest md = MessageDigest.getInstance("MD5");
   md.update(bytes);
   bytes = md.digest();
   int j = bytes.length;
   char[] chars = new char[j * 2];
   int k = 0;
   for (int i = 0; i < bytes.length; i++) {
    byte b = bytes[i];
    chars[k++] = hexChars[b >>> 4 & 0xf];
    chars[k++] = hexChars[b & 0xf];
   }
   return new String(chars);
  } catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
   throw new RuntimeException("MD5加密出錯！！+" + e);
  }
 }

 public static void main(String[] args) {
  System.out.println(MD5Util.encrypt("111111"));
 }

}

 //登錄的方法
  submitLogin() {
  //第一步 調用接口進行登錄，返回token字符串
  loginApi.submitLoginUser(this.user) 
   .then(response => {
    //第二步 獲取token字符串放到cookie里面
    //第一個參數cookie名稱，第二個參數值，第三個參數作用范圍
    cookie.set('user_token',response.data.data.token,{domain: 'localhost'})
    
    //第四步 調用接口 根據token獲取用戶信息，為了首頁面顯示
    loginApi.getLoginUserInfo()
    .then(response => {
     this.loginInfo = response.data.data.userInfo
     //獲取返回用戶信息，放到cookie里面(主頁在cookie中獲取用戶信息進行展示)
     cookie.set('user_info',this.loginInfo,{domain: 'localhost'})

     //跳轉頁面
     window.location.href = "/";
    })
   })
  },

// 創(chuàng)建axios實例
const service = axios.create({
 baseURL: process.env.BASE_API, // api 的 base_url
 timeout: 5000 // 請求超時時間
})

// request攔截器
service.interceptors.request.use(
 config => {
 if (cookie.get('user_token')) {
  config.headers['token'] = cookie.get('user_token') // 讓每個請求攜帶自定義token 請根據實際情況自行修改
 }
 return config
 },
 error => {
 // Do something with request error
 console.log(error) // for debug
 Promise.reject(error)
 }
)

//創(chuàng)建方法，從cookie獲取用戶信息
showInfo() {
 //從cookie獲取用戶信息
 var userStr = cookie.get('guli_ucenter')
 // 把字符串轉換json對象(js對象)，因為后端傳過來的是"{'name','lucy','age':18}"的格式
 if(userStr) {
 this.loginInfo = JSON.parse(userStr)
 }
}

<ul class="h-r-login">
 //cookie中沒有用戶信息，顯示登錄和注冊
 <li v-if="!loginInfo.id" id="no-login">
  <a href="/login" rel="external nofollow" title="登錄">
   <em class="icon18 login-icon">&nbsp;</em>
   <span class="vam ml5">登錄</span>
  </a>
  |
  <a href="/register" rel="external nofollow" title="注冊">
   <span class="vam ml5">注冊</span>
  </a>
 </li>
 //cookie中有用戶信息，顯示用戶頭像、昵稱和退出
 <li v-if="loginInfo.id" id="is-login-two" class="h-r-user">
  <a href="/ucenter" rel="external nofollow" title>
   <img
     :src="loginInfo.avatar"
     width="30"
     height="30"
     class="vam picImg"
     alt
     >
   <span id="userName" class="vam disIb">{{ loginInfo.nickname }}</span>
  </a>
  <a href="javascript:void(0);" rel="external nofollow" title="退出" @click="logout()" class="ml5">退出</a>
 </li>
</ul>

 //退出
 logout() {
  //清空cookie值
  cookie.set('user_token','',{domain: 'localhost'})
  cookie.set('user_info','',{domain: 'localhost'})
  //回到首頁面
  window.location.href = "/";
 }
 }