maven进入包

<!-- start jwt引入-->

<dependency>

<groupId>io.jsonwebtoken</groupId>

<artifactId>jjwt</artifactId>

<version>0.9.1</version>

</dependency>

<!--    end    jwt引入-->

Jwt工具类

package com.bruce.common.util;

import io.jsonwebtoken.Claims;

import io.jsonwebtoken.Jwts;

import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Date;

import java.util.concurrent.TimeUnit;

public class JwtUtil {

private static final String secret ="asdfasdf";

public static String createToken(String subject) {

String token = Jwts.builder().setExpiration(new Date(System.currentTimeMillis() +1000 *30)).setSubject(subject).signWith(SignatureAlgorithm.HS256,secret).compact();

return token;

}

public static String parseToken(String token) {

Claims body = Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();

String subject = body.getSubject();

return subject;

}

public static void main(String[] args) {

try {

String name ="关云长";

String token =createToken(name);

System.out.println("token:" + token);

TimeUnit.SECONDS.sleep(4);

String srcStr =parseToken(token);

System.out.println("解析出来：" + srcStr);

}catch (InterruptedException e) {

e.printStackTrace();

}

}

}