.net core 使用redis 基于 StackExchange.Redis

一.添加引用包

StackExchange.Redis

Microsoft.Extensions.Configuration

二.修改配置文件 appsettings.json

{
    "RedisConfig": {
        "Redis_Default": {
            "Connection": "127.0.0.1: 6379",
            "InstanceName": "Redis1: "
        },
        "Redis_6": {
            "Connection": "127.0.0.1: 6379",
            "DefaultDatabase": ,
            "InstanceName": "Redis2: "
        }
    }
}

三.简单封装

RedisClient.cs类

 public class RedisClient : IDisposable
 {
     private IConfigurationRoot _config;
     private ConcurrentDictionary<string, ConnectionMultiplexer> _connections;
     public RedisClient(IConfigurationRoot config)
     {
         _config = config;
         _connections = new ConcurrentDictionary<string, ConnectionMultiplexer>();
     }
     /// <summary>
     /// 获取ConnectionMultiplexer
     /// </summary>
     /// <param name="redisConfig">RedisConfig配置文件</param>
     /// <returns></returns>
     private ConnectionMultiplexer GetConnect(IConfigurationSection redisConfig)
     {
         var redisInstanceName = redisConfig["InstanceName"];
         var connStr = redisConfig["Connection"];
         return _connections.GetOrAdd(redisInstanceName, p => ConnectionMultiplexer.Connect(connStr));
     }
     /// <summary>
     /// 检查入参数
     /// </summary>
     /// <param name="configName">RedisConfig配置文件中的 Redis_Default/Redis_6 名称</param>
     /// <returns></returns>
     private IConfigurationSection CheckeConfig(string configName)
     {
         IConfigurationSection redisConfig = _config.GetSection("RedisConfig").GetSection(configName);
         if (redisConfig == null)
         {
             throw new ArgumentNullException($"{configName}找不到对应的RedisConfig配置！");
         }
         var redisInstanceName = redisConfig["InstanceName"];
         var connStr = redisConfig["Connection"];
         if (string.IsNullOrEmpty(redisInstanceName))
         {
             throw new ArgumentNullException($"{configName}找不到对应的InstanceName");
         }
         if (string.IsNullOrEmpty(connStr))
         {
             throw new ArgumentNullException($"{configName}找不到对应的Connection");
         }
         return redisConfig;
     }
     /// <summary>
     /// 获取数据库
     /// </summary>
     /// <param name="configName"></param>
     /// <param name="db">默认为0：优先代码的db配置，其次config中的配置</param>
     /// <returns></returns>
     public IDatabase GetDatabase(string configName = null, int? db = null)
     {
         int defaultDb = ;
         IConfigurationSection redisConfig = CheckeConfig(configName);
         if (db.HasValue)
         {
             defaultDb = db.Value;
         }
         else
         {
             var strDefalutDatabase = redisConfig["DefaultDatabase"];
             if (!string.IsNullOrEmpty(strDefalutDatabase) && Int32.TryParse(strDefalutDatabase, out var intDefaultDatabase))
             {
                 defaultDb = intDefaultDatabase;
             }
         }
         return GetConnect(redisConfig).GetDatabase(defaultDb);
     }

     public IServer GetServer(string configName = null, int endPointsIndex = )
     {
         IConfigurationSection redisConfig = CheckeConfig(configName);
         var connStr = redisConfig["Connection"];

         var confOption = ConfigurationOptions.Parse((string)connStr);
         return GetConnect(redisConfig).GetServer(confOption.EndPoints[endPointsIndex]);
     }

     public ISubscriber GetSubscriber(string configName = null)
     {
         IConfigurationSection redisConfig = CheckeConfig(configName);
         return GetConnect(redisConfig).GetSubscriber();
     }

     public void Dispose()
     {
         if (_connections != null && _connections.Count > )
         {
             foreach (var item in _connections.Values)
             {
                 item.Close();
             }
         }
     }
 }

因为RedisClient 中使用了ConcurrentDictionary

所以，有了RedisClientSingleton.cs类

 public class RedisClientSingleton
 {
     private static RedisClient _redisClinet;
     private RedisClientSingleton() { }

     private static object _lockObj = new object();
     public static RedisClient GetInstance(IConfigurationRoot config)
     {
         if (_redisClinet == null)
         {
             lock (_lockObj)
             {
                 if (_redisClinet == null)
                 {
                     _redisClinet = new RedisClient(config);
                 }
             }
         }
         return _redisClinet;
     }
 }

四.测试

1、控制台程序

1）创建一个Controller程序

2）添加引用包

Microsoft.Extensions.Configuration

Microsoft.Extensions.Configuration.Json

3）添加appsettings.json

添加以下

"RedisConfig": {
    "Redis_Default": {
      "Connection": "127.0.0.1:6379",
      "InstanceName": "Redis1:"
    },
    "Redis_6": {
      "Connection": "127.0.0.1:6379",
      "DefaultDatabase": ,
      "InstanceName": "Redis2:"
    }
  }

4）修改Program类

①添加引用using Microsoft.Extensions.Configuration;

②修改Main

  static void Main(string[] args)
  {
   　　var builder = new ConfigurationBuilder()
                 .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json");
             IConfigurationRoot configuration = builder.Build();

  　　var redisClient = RedisClientSingleton.GetInstance(configuration);  　　var redisDatabase = redisClient.GetDatabase("Redis_Default");

  　　redisDatabase.StringSet("TestStrKey", "TestStrValue");
12 }

③运行后可以看到

2、web程序

①创建一个core的mvc项目

②修改Startup.cs文件

修改ConfigureServices函数

public void ConfigureServices(IServiceCollection services)
{
    ...
    services.AddSingleton(Configuration);
    ...
}

其中的Configuration是 public IConfigurationRoot Configuration { get; }

③创建一个TestController

在修改构造函数

SimpleRedisExt _redisExt;

public TokenTranslateController(IConfigurationRoot config)//, IConfigurationRoot config)
{
    _config = config;
    IDatabase redisDataBase = RedisClientSingleton.GetInstance(_config).GetDatabase("Redis_Default");
}

public string Post(string value)
{
    redisDataBase.StringSet("TestMvcRedis", value);
}

④运行value = TestMvcRedisValue 后得到

随手写的，写得比较糙。