Token的后台生成实现类

1、后台编写加密和解密的方法，注意引入对应的jar包

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

</dependency>

2、后台代码

package com.example.token;

import io.jsonwebtoken.Claims;

import io.jsonwebtoken.JwtBuilder;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import java.security.Key;
import java.util.Date;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.bind.DatatypeConverter;

/**
 * Toten令牌验证
 * @since: 2018年6月21日下午4:18:21 
 * @version: 1.0
 */
public class Token {

/**
* 加密
* @param id
* @param issuer
* @param subject
* @param ttlMillis
* @return
*/
private String createJWT(String id, String issuer, String subject, long ttlMillis) {
 
//The JWT signature algorithm we will be using to sign the token
SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
 
long nowMillis = System.currentTimeMillis();
Date now = new Date(nowMillis);
 
//We will sign our JWT with our ApiKey secret
byte[] apiKeySecretBytes = DatatypeConverter.parseBase64Binary("4234dfasdfqdd");
Key signingKey = new SecretKeySpec(apiKeySecretBytes, signatureAlgorithm.getJcaName());
 
  //Let's set the JWT Claims
JwtBuilder builder = Jwts.builder().setId(id)
                                .setIssuedAt(now)
                                .setSubject(subject)
                                .setIssuer(issuer)
                                .signWith(signatureAlgorithm, signingKey);
 
//if it has been specified, let's add the expiration
if (ttlMillis >= 0) {
    long expMillis = nowMillis + ttlMillis;
    Date exp = new Date(expMillis);
    builder.setExpiration(exp);
}
 
//Builds the JWT and serializes it to a compact, URL-safe string
return builder.compact();
}

/**
* 解密
* @param jwt
*/
private void parseJWT(String jwt) {
//This line will throw an exception if it is not a signed JWS (as expected)
Claims claims = Jwts.parser()        
   .setSigningKey(DatatypeConverter.parseBase64Binary("4234dfasdfqdd"))
   .parseClaimsJws(jwt).getBody();
System.out.println("ID: " + claims.getId());
System.out.println("Subject: " + claims.getSubject());
System.out.println("Issuer: " + claims.getIssuer());
System.out.println("Expiration: " + claims.getExpiration());
}

public static void main(String[] args) {

Token t = new Token();
//加密
String jwt = t.createJWT("3133", "13dsdda", "afrefsa", 20171252);
System.out.println(jwt);

//解密
t.parseJWT(jwt);
}

}

3、测试结果

eyJhbGciOiJIUzI1NiJ9.eyJqdGkiOiIzMTMzIiwiaWF0IjoxNTI5NTY5MDQ1LCJzdWIiOiJhZnJlZnNhIiwiaXNzIjoiMTNkc2RkYSIsImV4cCI6MTUyOTU4OTIxNn0.nLJ2pRogA7Y6ZboqbRR44fARGCfMnkos0XtjF2BvIuw
ID: 3133
Subject: afrefsa
Issuer: 13dsdda
Expiration: Thu Jun 21 21:53:36 CST 2018