jwt配置类

不知道什么是jwt请看这位博主写的

https://www.zhihu.com/question/485758060/answer/2257869896

需要在pom文件导入一个依赖

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt</artifactId>
    <version>0.7.0</version>
</dependency>

package com.msb.msb.dongbao.common.util;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.util.Date;

public class JwtUtil {

    private static final String SECRET = "sadfsa";

    public static String createToken(String subject) {
        String token = Jwts.builder().setSubject(subject).
                setExpiration(new Date(System.currentTimeMillis() + 1000 * 20)).
                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) throws InterruptedException {
        String name = "小白浩、";
        String token = createToken(name);
        System.out.println("token: " + token);

        String s = parseToken(token);
        System.out.println("解析过后的值：" + s);
    }

}