// TOKEN的有效期一天（S）
private static final int TOKEN_TIME_OUT = 3_600;
// 加密KEY
private static final String TOKEN_ENCRY_KEY = "MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY";
// 最小刷新间隔(S)
private static final int REFRESH_TIME = 300;

// 生产ID
public static String getToken(Long id){
    Map<String, Object> claimMaps = new HashMap<>();
    claimMaps.put("id",id);
    long currentTime = System.currentTimeMillis();
    return Jwts.builder()
            .setId(UUID.randomUUID().toString())
            .setIssuedAt(new Date(currentTime))  //签发时间
            .setSubject("system")  //说明
            .setIssuer("heima") //签发者信息
            .setAudience("app")  //接收用户
            .compressWith(CompressionCodecs.GZIP)  //数据压缩方式
            .signWith(SignatureAlgorithm.HS512, generalKey()) //加密方式
            .setExpiration(new Date(currentTime + TOKEN_TIME_OUT * 1000))  //过期时间戳
            .addClaims(claimMaps) //cla信息
            .compact();
}

/**
 * 获取token中的claims信息
 *
 * @param token
 * @return
 */
private static Jws<Claims> getJws(String token) {
        return Jwts.parser()
                .setSigningKey(generalKey())
                .parseClaimsJws(token);
}

/**
 * 获取payload body信息
 *
 * @param token
 * @return
 */
public static Claims getClaimsBody(String token) {
    try {
        return getJws(token).getBody();
    }catch (ExpiredJwtException e){
        return null;
    }
}

/**
 * 获取hearder body信息
 *
 * @param token
 * @return
 */
public static JwsHeader getHeaderBody(String token) {
    return getJws(token).getHeader();
}

/**
 * 是否过期
 *
 * @param claims
 * @return -1：有效，0：有效，1：过期，2：过期
 */
public static int verifyToken(Claims claims) {
    if(claims==null){
        return 1;
    }
    try {
        claims.getExpiration()
                .before(new Date());
        // 需要自动刷新TOKEN
        if((claims.getExpiration().getTime()-System.currentTimeMillis())>REFRESH_TIME*1000){
            return -1;
        }else {
            return 0;
        }
    } catch (ExpiredJwtException ex) {
        return 1;
    }catch (Exception e){
        return 2;
    }
}

/**
 * 由字符串生成加密key
 *
 * @return
 */
public static SecretKey generalKey() {
    byte[] encodedKey = Base64.getEncoder().encode(TOKEN_ENCRY_KEY.getBytes());
    SecretKey key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
    return key;
}

public static void main(String[] args) {
   /* Map map = new HashMap();
    map.put("id","11");*/
    System.out.println(AppJwtUtil.getToken(1102L));
    Jws<Claims> jws = AppJwtUtil.getJws("eyJhbGciOiJIUzUxMiIsInppcCI6IkdaSVAifQ.H4sIAAAAAAAAADWLQQqEMAwA_5KzhURNt_qb1KZYQSi0wi6Lf9942NsMw3zh6AVW2DYmDGl2WabkZgreCaM6VXzhFBfJMcMARTqsxIG9Z888QLui3e3Tup5Pb81013KKmVzJTGo11nf9n8v4nMUaEY73DzTabjmDAAAA.4SuqQ42IGqCgBai6qd4RaVpVxTlZIWC826QA9kLvt9d-yVUw82gU47HDaSfOzgAcloZedYNNpUcd18Ne8vvjQA");
    Claims claims = jws.getBody();
    System.out.println(claims.get("id"));

}