工具-登录生成token

1.实现代码

package com.cn.lze.utils;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.*;

/**
 * @auther sunlongfei
 * create at 2022/6/9 11:20
 * @pragram smart-park-parent
 * @description: 生成token工具
 */
@Component
public class TokenUtils {

    Logger logger =  LoggerFactory.getLogger(TokenUtils.class);
    //token秘钥
    public static final String TOKEN_SECRET="f26e587c28064d0e855e72c0a6a0e618";

    /**
     * 生成token值
     * @param username
     * @param password
     * @return
     */
    public String token(String username,String password){
        String token = "";
        try{
            //设置过期时间12个小时
            Calendar calendar = Calendar.getInstance();
            // Date now = calendar.getTime();
            calendar.add(Calendar.MINUTE, 12*60);
            Date expireDate = calendar.getTime();
            //秘钥以及加密算法
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            //设置头部算法
            Map<String,Object> header = new HashMap<>();
            header.put("typ","JWT");
            header.put("alg","HS256");
            token =JWT.create()
                    .withHeader(header)
                    .withClaim("userName",username)
                    .withClaim("passWord",password)
                    .withExpiresAt(expireDate)
                    .sign(algorithm);
        }catch (Exception e){
            logger.error("生成token值失败: ",e);
            return null;
        }

        return token;
    }

    /**
     * 验证token是否正确
     * @param token
     * @return
     */
    public static boolean checkToken(String token){
        try{
            //秘钥以及加密算法
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            JWTVerifier verifier = JWT.require(algorithm).build();
            DecodedJWT jwt = verifier.verify(token);
            System.out.println("userName：-------"+jwt.getClaim("userName").asString());
            System.out.println("passWord：-------"+jwt.getClaim("passWord").asString());
            DecodedJWT TokenInfo = JWT.require(Algorithm.HMAC256(TOKEN_SECRET)).build().verify(token);
            return true;
        }catch (Exception e) {
            return false;
        }

    }

    public static String parseJWT(String token){
        DecodedJWT decodeToken = JWT.decode(token);
        return decodeToken.getClaim("loginName").asString();
    }


    /**
     * @desc 判断token是否过期
     * @author lj
     */
    public static boolean isJwtExpired(String token){

        try {
            DecodedJWT decodeToken = JWT.decode(token);
            return decodeToken.getExpiresAt().before(new Date());
        } catch(Exception e){
            e.printStackTrace();
            return true;
        }
    }



    public static void  main(String[] args){
        String token = new TokenUtils().token("admin","admin!@#$1234");
        System.out.println(token);
        checkToken(token);
        System.out.println(isJwtExpired(token));

    }
}