NETCORE

NETCORE - Redis的使用

.NetCore 使用StackExchange.Redis 连接Redis 

在netcore项目中安装 StackExchange.Redis 的Nuget包。

在appsettings.json中添加connection连接字符串：

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*",
  "ConnectionStrings": {
    "DBViewAuth_MySql": "server=localhost;userid=root;pwd=123456;port=3306;database=dbviewauth;sslmode=none;",
    "RedisConnectionString": "10.5.30.239:6380,DefaultDatabase=10" 
  }
}

然后新建一个RedisClient.cs 帮助类，简单封装了一下redis的string操作：

RedisClient.cs 帮助类，如下：

using Microsoft.Extensions.Configuration;
using Newtonsoft.Json;
using StackExchange.Redis;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace VIEW.BACK
{
    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 = Configuration.GetConnectionString("RedisConnectionString");
                redisMultiplexer = ConnectionMultiplexer.Connect(RedisConnection);
                db = redisMultiplexer.GetDatabase();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                redisMultiplexer = null;
                db = null;
            }
        }

        public RedisClient()
        {

        }


        #region String

        /// <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);
        }

        #endregion
    }
}

在Startup.cs入口中 初始化RedisClient 的连接：

Startup.cs文件如下：

        public void ConfigureServices(IServiceCollection services)
        { 


            //初始化redis
            RedisClient.redisClient.InitConnect(Configuration);
             
            services.AddOptions();

        }

 方法调用：

        [Route("tt1")]
        [HttpGet]
        public IEnumerable<string> tt1()
        {
            int id = 3;

            var redisResult = RedisClient.redisClient.GetStringKey<int>("key1");
            //若redis没有数据,则取数据并设置redis
            if (redisResult == null || redisResult == default(int))
            {
                Console.WriteLine("redisResult is empty");
                RedisClient.redisClient.SetStringKey("key1", id.ToString());
                var sdf = id.ToString();
            }


            return new string[] { "value1", "value2" };
        }

 安装RedisDesktopManager 可查看 redis数据。

引用：https://blog.csdn.net/wcc27857285/article/details/96717258