JWTUtils封装

/**
 * @Author DiamondLove
 * @Date 2021/1/11 22:37
 * @Version 1.0
 */
public class JWTUtils {
    private static String TOKEN = "token1314"; //加盐

    /**
     * 生成token  header.payload.sing
     * @param map
     * @return
     */
    public static String getToken(Map<String,String> map){
        JWTCreator.Builder builder = JWT.create();

        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DATE,7);//默认7天

        //创建jwt builder
        map.forEach((k,v) ->{
            builder.withClaim(k,v);
        });
        String token = builder.withExpiresAt(instance.getTime())//指定令牌过期时间
                .sign(Algorithm.HMAC256(TOKEN));//sign
        return token;
    }

    /**
     * 验证token 合法性
     */
    public static void verify(String token){
        JWT.require(Algorithm.HMAC256(TOKEN)).build().verify(token);
    }

    /**
     * 获取token信息
     *   System.out.println(verify.getClaim("username").asString());
     *   System.out.println(verify.getClaim("admin").asString());
     *   System.out.println("过期时间："+verify.getExpiresAt());
     */
    public static DecodedJWT getTokenInfo(String token){
      return JWT.require(Algorithm.HMAC256(TOKEN)).build().verify(token);
    }
}