<dependency>

    <groupId>com.auth0</groupId>

    <artifactId>java-jwt</artifactId>

    <version>3.4.0</version>

</dependency>

 1 public class JWTUtil {

 2     //过期时间15分钟

 3     private static final long EXPIRE_TIME = 15*60*1000;

 4     //token秘钥,设置的复杂点这里用一串uuid，并用HMAC256加密的

 5     private static final String TOKEN_SECRET = "JFKDJFKGFGFGIFG8R9589589";

 6

 7     //生成token

 8     public static String generatorToken(String userName,Stringn userId) {

 9         //过期时间

10         Date date = new Date(System.currentTimeMillis()+EXPIRE_TIME );

11         //秘钥及加密算法

12         Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);

13         //设置头部信息

14         Map<String,Object> header = new HashMap<String,Object>(2);

15         header.put("type","JWT");

16         header.put("alg","HS256");

17         //附带用户信息，生成token

18         return JWT.create()

19             .withHeader(header)

20             .withClaim("userName",userName)

21             .withClaim("userId",userId)

22             .withExpiresAt(date)

23             .sign(algorithm);

24     }

25 }