SMP.Service/1.Common/SMP.Common/Auth/JWTHelper.cs

using Microsoft.Extensions.Configuration;
using Microsoft.IdentityModel.Tokens;
using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens;
using System.IdentityModel.Tokens.Jwt;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;

namespace SMP.Common.Auth
{
    public static class JWTHelper
    {


        public static string CreateToken(IConfiguration configuration, UserDto user)
        {
            // 1. 定义需要使用到的Claims
            var claims = new[]
            {
                       new Claim(ClaimTypes.Name,user.userNickName),
                       new Claim(ClaimTypes.Role, string.Join( ',',user.roles)),
                       new Claim(ClaimTypes.NameIdentifier,user.token)
            };

            // 2. 从 appsettings.json 中读取SecretKey
            var secretKey = new Microsoft.IdentityModel.Tokens.SymmetricSecurityKey(Encoding.UTF8.GetBytes(configuration["JWT:SecretKey"]));

            // 3. 选择加密算法
            var algorithm = SecurityAlgorithms.HmacSha256;

            // 4. 生成Credentials
            var signingCredentials = new SigningCredentials(secretKey, algorithm);

            // 5. 从 appsettings.json 中读取Expires
            var expires = Convert.ToDouble(configuration["JWT:Expires"]);

            // 6. 根据以上，生成token
            var token = new JwtSecurityToken(
                configuration["JWT:Issuer"],     //Issuer
                configuration["JWT:Audience"],   //Audience
                claims,                          //Claims,
                DateTime.Now,                    //notBefore
                DateTime.Now.AddDays(expires),   //expires
                signingCredentials               //Credentials
            );

            // 7. 将token变为string
            var jwtToken = new JwtSecurityTokenHandler().WriteToken(token);

            return jwtToken;
        }
    }
}