SpringBoot集成JWT生成token及校驗方法過程解析

更新時間：2020年04月02日 15:04:03 作者：陌生街中吹起褪色故夢

這篇文章主要介紹了SpringBoot集成JWT生成token及校驗方法過程解析,文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下

GitHub源碼地址：https://github.com/zeng-xian-guo/springboot_jwt_token.git

封裝JTW生成token和校驗方法

public class JwtTokenUtil {

  //公用密鑰-保存在服務端,客戶端是不會知道密鑰的,以防被攻擊
  public static String SECRET = "ThisIsASecret";

  //生成Troke
  public static String createToken(String username) {
    //簽發(fā)時間
    //Date iatDate = new Date();
    //過地時間 1分鐘后過期
    //Calendar nowTime = Calendar.getInstance();
    //nowTime.add(Calendar.MINUTE, 1);
    //Date expiresDate = nowTime.getTime();
    Map<String, Object> map = new HashMap();
    map.put("alg", "HS256");
    map.put("typ", "JWT");
    String token = JWT.create()
          .withHeader(map)
          //.withClaim( "name","Free碼生") //設置 載荷 Payload
          //.withClaim("age","12")
          //.withClaim( "org","測試")
          //.withExpiresAt(expiresDate)//設置過期時間,過期時間要大于簽發(fā)時間
          //.withIssuedAt(iatDate)//設置簽發(fā)時間
          .withAudience(username) //設置 載荷 簽名的觀眾
          .sign(Algorithm.HMAC256(SECRET));//加密
    System.out.println("后臺生成token:" + token);
    return token;
  }

  //校驗TOKEN
  public static boolean verifyToken(String token) throws UnsupportedEncodingException{
    JWTVerifier verifier = JWT.require(Algorithm.HMAC256(SECRET)).build();
    try {
      verifier.verify(token);
      return true;
    } catch (Exception e){
      return false;
    }
  }

  //獲取Token信息
  public static DecodedJWT getTokenInfo(String token) throws UnsupportedEncodingException{
    JWTVerifier verifier = JWT.require(Algorithm.HMAC256(SECRET)).build();
    try{
      return verifier.verify(token);
    } catch(Exception e){
      throw new RuntimeException(e);
    }
  }

}

新建自定義注解：@UserLoginToken

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface UserLoginToken {
  boolean required() default true;
}

關于攔截器配置：

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(authenticationInterceptor())
        .addPathPatterns("/**");  // 攔截所有請求，通過判斷是否有 @LoginRequired 注解 決定是否需要登錄
  }
  @Bean
  public AuthenticationInterceptor authenticationInterceptor() {
    return new AuthenticationInterceptor();
  }
}

public class AuthenticationInterceptor implements HandlerInterceptor {
  @Autowired
  UserService userService;
  @Override
  public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
    String token = httpServletRequest.getHeader("token");// 從 http 請求頭中取出 token
    // 如果不是映射到方法直接通過
    if(!(object instanceof HandlerMethod)){
      return true;
    }
    HandlerMethod handlerMethod=(HandlerMethod)object;
    Method method=handlerMethod.getMethod();
    //檢查是否有passtoken注釋，有則跳過認證
    if (method.isAnnotationPresent(PassToken.class)) {
      PassToken passToken = method.getAnnotation(PassToken.class);
      if (passToken.required()) {
        return true;
      }
    }
    //檢查有沒有需要用戶權(quán)限的注解
    if (method.isAnnotationPresent(UserLoginToken.class)) {
      UserLoginToken userLoginToken = method.getAnnotation(UserLoginToken.class);
      if (userLoginToken.required()) {
        // 執(zhí)行認證
        if (token == null) {
          throw new RuntimeException("無token，請重新登錄");
        }
        // 驗證 token
        if(JwtTokenUtil.verifyToken(token)){
          return true;
        }else {
          throw new RuntimeException("401");
        }
      }
    }
    return true;
  }
  @Override
  public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
  }
  @Override
  public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
  }
}

登錄：

在Controller上登錄方法不用添加@UserLoginToken自定義注解，其余獲取后臺數(shù)據(jù)方法加上@UserLoginToken自定義注解，目的驗證token是否有效，是則返回數(shù)據(jù)，否則提示401無權(quán)限。

測試：

@Controller
@RequestMapping(path = "/api")
public class IndexController {

  private String prefix = "index/";

  @GetMapping("/index")
  public String index()
  {
    return prefix + "index";
  }

  @UserLoginToken
  @PostMapping("/test")
  @ResponseBody
  public Object test(){
    Map<String,Object> map = new HashMap<>();
    map.put("code","200");
    map.put("message","你已通過驗證了");
    return map;
  }
}

HTTP請求帶上登陸成功后生成token，返回成功：