JWT 加密

package com.mes.metering.util;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @program: wx-template
 * @description
 * @author: sgy
 * @create: 2022-05-02 18:17
 **/
public class TokenUtils {

    //设置过期时间
    private static final long EXPIRE_DATE=30*60*100000;
    //token秘钥
    private static final String TOKEN_SECRET = "ZCfasfhuaUUHufguGuwu2020BQWE";

   // private static final String TOKEN_SECRET = "56";

    public static String token (String username,String password,String flag){

        String token = "";
        try {
            //过期时间
            Date date = new Date(System.currentTimeMillis()+EXPIRE_DATE);
            //秘钥及加密算法
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            //设置头部信息
            Map<String,Object> header = new HashMap<>();
            header.put("typ","JWT");
            header.put("alg","HS256");
            //携带username，password信息，生成签名
            token = JWT.create()
                    .withHeader(header)
                    .withClaim("username",username)
                    .withClaim("flag",flag)
                    .withClaim("password",password).withExpiresAt(date)
                    .sign(algorithm);
        }catch (Exception e){
            e.printStackTrace();
            return  null;
        }
        return token;
    }

    public static boolean verify(String token){
        /**
         * @desc   验证token，通过返回true
         * @params [token]需要校验的串
         **/
        try {
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            JWTVerifier verifier = JWT.require(algorithm).build();
            DecodedJWT jwt = verifier.verify(token);
            return true;
        }catch (Exception e){
            e.printStackTrace();
            return  false;
        }
    }
    public static String parseJWT(String token){
        /**
         * @desc   解密token，返回一个map
         * @params [token]需要校验的串
         **/
        DecodedJWT decodeToken = JWT.decode(token);
        return decodeToken.getClaim("flag").asString();
    }
    public static String parseMobile(String token){
        /**
         * @desc   解密token，返回一个map
         * @params [token]需要校验的串
         **/
        DecodedJWT decodeToken = JWT.decode(token);
        return decodeToken.getClaim("username").asString();
    }
    public static boolean isJwtExpired(String token){
        /**
         * @desc 判断token是否过期
         * @author lj
         */
        try {
            DecodedJWT decodeToken = JWT.decode(token);
            return decodeToken.getExpiresAt().before(new Date());
        } catch(Exception e){
            return true;
        }
    }

    public static void main(String[] args) {
        String username ="zhangsan";
        String password = "123";
        String flag="1";
        String token = token(username,password,flag);
        System.out.println(token);
//        boolean b = verify("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwYXNzd29yZCI6IjEyMyIsImV4cCI6MTY1MTY2NjgxMiwidXNlcm5hbWUiOiJ6aGFuZ3NhbiJ9.ufQzpVE0scbG1xznt1WdZvCiZgCkyNEfRzk_jpeFMw4");
//        System.out.println(b);
//        String st = parseJWT("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwYXNzd29yZCI6IjEyMyIsImV4cCI6MTY1MTY2NjgxMiwidXNlcm5hbWUiOiJ6aGFuZ3NhbiJ9.ufQzpVE0scbG1xznt1WdZvCiZgCkyNEfRzk_jpeFMw4");
//        System.out.println(st);
//        Boolean c = isJwtExpired("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJwYXNzd29yZCI6IjEyMyIsImV4cCI6MTY1MTY2NjgxMiwidXNlcm5hbWUiOiJ6aGFuZ3NhbiJ9.ufQzpVE0scbG1xznt1WdZvCiZgCkyNEfRzk_jpeFMw4");
//        System.out.println(c);
    }
}

<dependency>
    <groupId>com.auth0</groupId>
    <artifactId>java-jwt</artifactId>
    <version>3.8.2</version>
</dependency>