Jwt Token Token

/ * 
Use JWT generation TOKEN, and log APP Token generation and parsing 
 * / 
public  class JwtTokenUtil {
     / ** 
     * token secret key 
     * / 
    public  static  Final String SECRET = "1234567890" ;
     Private  static  Final String Key = "the user_code" ; 

    / ** 
     * the JWT generate the Token. 
     * constituting the JWT: header, payload, Signature 
     * @param after successful login user userNo no, no parameter is not passed empty
      * / 
    @Validated 
    public  static String createToken (@NotBlank userNo String) throws Exception { 
        iatDate DATE =new Date();
        // expire time
        Calendar nowTime = Calendar.getInstance();
        nowTime.add(Calendar.DATE, 10);
        Date expiresDate = nowTime.getTime();

        // header Map
        Map<String, Object> map = new HashMap<>();
        map.put("alg", "HS256");
        map.put("typ", "JWT");

        // build token
        // param backups {iss:Service, aud:APP}
        String token = JWT.create().withHeader(map) // header
                .withClaim("iss", "Service") // payload
                .withClaim("aud", "APP")
                .withClaim(key, userNo)
                .withIssuedAt(iatDate) // sign time
                .withExpiresAt(expiresDate) // expire time
                .sign(Algorithm.HMAC256(SECRET)); // signature

        return token;
    }

    /**
     * 解密Token
     * @param token
     * @return
     * @throws Exception
     */
    private staticMap <String, the Claim> verifyToken (String token) { 
        DecodedJWT JWT = null ;
         the try { 
            JWTVerifier Verifier = JWT.require (Algorithm.HMAC256 (SECRET)) Build ();. 
            JWT = verifier.verify (token); 
        } the catch ( E exception) {
             // e.printStackTrace ();
             // token verification fails, the illegal authentication token thrown exception 
            the throw  new new BusinessException ( "token verification failure" ); 
        } 
        return jwt.getClaims (); 
    } 

    / ** 
     * The Token obtain user_no 
     *@param token
     * @return user_No
     */
    public static String getAppUID(String token) {
        Map<String, Claim> claims = verifyToken(token);
        Claim user_id_claim = claims.get(key);
        if (null == user_id_claim || StringUtils.isBlank(user_id_claim.asString())) {
            // token 校验失败, 抛出Token验证非法异常
            throw new BusinessException("token 异常");
        }
        return user_id_claim.asString();
    }
}