Nodejs使用redis详解编程语言

npm install redis　　

var redis = require("redis") , 
client = redis.createClient(); 
 
client.on("error", function (err) { 
    console.log("Error " + err); 
}); 
   
//链接redis_name表 
client.on("connect", redis_name); 
  
  
function runSample() { 
     //使用set 对key 进行赋值， 
      client.set("key", "Hello World", function (err, reply) { 
           console.log(reply.toString()); 
      }); 
     //使用get 获取key的值 
     client.get("key", function (err, reply) { 
          console.log(reply.toString()); 
      }); 
}

//设置key的失效时间 
client.expire('key', 3);　　

var redis = require("redis"),//召唤redis   
/*  
    连接redis数据库，createClient(port,host,options);  
    如果REDIS在本机，端口又是默认，直接写createClient()即可  
    redis.createClient() = redis.createClient(7788, '127.0.0.1', {})  
*/   
client = redis.createClient(7788,'192.168.159.128',{});   
//如果需要验证，还要进行验证   
//client.auth(password, callback);   
   
// if you'd like to select database 3, instead of 0 (default), call   
// client.select(3, function() { /* ... */ });   
   
//错误监听？   
client.on("error", function (err) {   
    console.log("Error " + err);   
});   
   
client.set("string key", "string val", redis.print);//set "string key" "string val"   
/*  
    redis.print，回调函数，将redis的返回值显示出来。上一句执行结果，将返回“OK”   
*/   
client.hset("hash key", "hashtest 1", "some value", redis.print);   
client.hset(["hash key", "hashtest 2", "some other value"], redis.print);   
//遍历哈希表"hash key"   
client.hkeys("hash key", function (err, replies) {   
    console.log(replies.length + " replies:");   
    replies.forEach(function (reply, i) {   
        console.log("    " + i + ": " + reply);   
    });   
client.hget("hash key","hashtest 1",redis.print);       
   
/*两种都可以断掉与redis的连接，  
end()很粗暴，不管3721，一下子退出来了，上面那句获取哈希表"hash key"的某个元素值的表达式将没有结果返回  
而quit()则是先将语句处理完毕再干净地退出，斯文得很  
*/   
//client.end();   
client.quit();   
});