JWT生成token

using JWT;
using JWT.Algorithms;
using JWT.Exceptions;
using JWT.Serializers;
using System;
using System.Collections.Generic;

namespace common
{
public class JWTHelper
{
public static string CreateJWT()
{
var payload = new Dictionary<string, object>
{
{ "claim1", 0 },
{ "claim2", "claim2-value" }
};
const string secret = "GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
IJsonSerializer serializer = new JsonNetSerializer();
IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);
var token = encoder.Encode(payload, secret);
return token;
}
public static string DecodeJWT(string token)
{
const string secret = "GQDstcKsx0NHjPOuXOYg5MbeJ1XT0uFiwDVvVBrk";
string result = "";
try
{
IJsonSerializer serializer = new JsonNetSerializer();
IDateTimeProvider provider = new UtcDateTimeProvider();
IJwtValidator validator = new JwtValidator(serializer, provider);
IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
IJwtDecoder decoder = new JwtDecoder(serializer, validator, urlEncoder, algorithm);

result = decoder.Decode(token, secret, verify: true);
}
catch (TokenExpiredException)
{
Console.WriteLine("Token has expired");
}
catch (SignatureVerificationException)
{
Console.WriteLine("Token has invalid signature");
}
catch (Exception EX)
{
Console.WriteLine("Token has invalid signature");
}
return result;
}
}
}