asp.net core使用redis实现分布式缓存

首先Windows安装redis并将redis设置成服务

参考网址：https://blog.csdn.net/Mrqiang9001/article/details/79428976

注意：修改redis.windows.conf文件 设置密码requirepass和注释掉bind ip使得外网可以访问 另外服务器端口6379记得打开

引用包StackExchange.Redis

<PackageReference Include="StackExchange.Redis" Version="2.1.30" />

一、添加配置（appsettings.json）

  "ConnectionStrings": {
    "Redis": "XXX.XX.XX.XXX,password=******,DefaultDatabase=0"
  },

二、添加服务依赖（Startup.cs）

RedisClient.redisClient.InitConnect(Configuration);

三、redis帮助类（RedisClient）

using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Text;

namespace Dw.Util.Helper
{
    public class RedisClient
    {
        private static readonly object Locker = new object();

        private ConnectionMultiplexer redisMultiplexer;

        IDatabase db = null;

        private static RedisClient _redisClient = null;
        public static RedisClient redisClient
        {
            get
            {
                if (_redisClient == null)
                {
                    lock (Locker)
                    {
                        if (_redisClient == null)
                        {
                            _redisClient = new RedisClient();

                        }
                    }
                }
                return _redisClient;
            }
        }

        public void InitConnect(IConfiguration Configuration)
        {
            try
            {
                var RedisConnection = ConfigHelper.GetValue("ConnectionStrings:Redis");
                redisMultiplexer = ConnectionMultiplexer.Connect(RedisConnection);
                db = redisMultiplexer.GetDatabase();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                redisMultiplexer = null;
                db = null;
            }
        }

        public RedisClient()
        {

        }
 
        /// <summary>
        /// 保存单个key value
        /// </summary>
        /// <param name="value">保存的值</param>
        /// <param name="expiry">过期时间</param>
        public bool SetStringKey(string key, string value, TimeSpan? expiry = default(TimeSpan?))
        {
            return db.StringSet(key, value, expiry);
        }

        /// <summary>
        /// 获取单个key的值
        /// </summary>
        public RedisValue GetStringKey(string key)
        {
            return db.StringGet(key);
        }


        /// <summary>
        /// 获取一个key的对象
        /// </summary>
        public T GetStringKey<T>(string key)
        {
            if (db == null)
            {
                return default;
            }
            var value = db.StringGet(key);
            if (value.IsNullOrEmpty)
            {
                return default;
            }
            return JsonConvert.DeserializeObject<T>(value);
        }

        /// <summary>
        /// 保存一个对象
        /// </summary>
        /// <param name="obj"></param>
        public bool SetStringKey<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
        {
            if (db == null)
            {
                return false;
            }
            string json = JsonConvert.SerializeObject(obj);
            return db.StringSet(key, json, expiry);
        }
    }
}

四、在控制器中使用

        #region Redis测试
        /// <summary>
        /// Redis测试
        /// </summary>
        /// <returns></returns>
        [Route("Redis")]
        [HttpGet]
        public ActionResult Redis()
        {
            var redisResult = RedisClient.redisClient.GetStringKey("myKey");
            return Ok(new { code = "200", res = new { msg = redisResult.ToString() } });
        }
        #endregion