<dependency>
    <groupId>com.auth0</groupId>
    <artifactId>java-jwt</artifactId>
    <version>4.3.0</version>
</dependency>

@Test
//生成token
void jwtdemo01(){
     Calendar instance = Calendar.getInstance();
     //instance.add(Calendar.SECOND, 90);
     instance.add(Calendar.DAY_OF_WEEK, 7);

    System.out.println(instance.getTime());
    String token = JWT.create()
            .withClaim("username", "李四")//payload 设置自定义用户名
            .withExpiresAt(instance.getTime())//设置过期时间
            .sign(Algorithm.HMAC256("123"));//设置签名 密钥
    System.out.println(token);
    //"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE3MDM5NDcyODMsInVzZXJuYW1lIjoi5p2O5ZubIn0.3onRy8p0G9ojnpA9u5h5ytd8hLZpGMZUyj49LTge5ao"
}

@Test
//验证token
void jwtdemo02(){
    //创建验证对象
    //参数1：签名使用的算法 参数2：签名的密钥
    JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256("123")).build();
    //
    DecodedJWT verify =jwtVerifier.verify("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJleHAiOjE3MDM5NDcyODMsInVzZXJuYW1lIjoi5p2O5ZubIn0.3onRy8p0G9ojnpA9u5h5ytd8hLZpGMZUyj49LTge5ao");
    System.out.println(verify.getClaim("username"));
}

public class JWTUtil {
    private static final   String TOKENKey="qgs12345";

    /**
     * 生成token
     * @param map
     * @return 返回token
     */
    public static String getToken(Map<String,String> map){
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DATE,7);//7天过期

        //添加payload
        JWTCreator.Builder builder = JWT.create();
        map.forEach((k,v)->{
            builder.withClaim(k,v);
        });

        builder.withExpiresAt(instance.getTime());//设置令牌过期时间
        //生成并返回token
       return builder.sign(Algorithm.HMAC256(TOKENKey)).toString();
    }

    /**
     * 验证token
     * @param token
     */
    public static void verify(String token){
        JWT.require(Algorithm.HMAC256(TOKENKey)).build().verify(token);
    }

    /**
     * 获取token中payload
     * @param token
     * @return
     */
    public static DecodedJWT getTokenInfo(String token){
        return JWT.require(Algorithm.HMAC256(TOKENKey)).build().verify(token);
    }
}