java memcache应用

 import java.io.Serializable;

 import java.text.DateFormat;

 import java.util.Date;

 import java.util.Map;

 import com.danga.MemCached.MemCachedClient;

 import com.pt.util.memcached.MemcachedTool;

 public class testMemcached {

     /**

      * @param args

      */

     public static void main(String[] args) {

         // TODO Auto-generated method stub

         MemCachedClient mc = MemcachedTool.getInstance();

         //(1000 * 129是本地时间和服务器端时间的差值)

         Date failDate = new Date(System.currentTimeMillis() - 1000 * 129 + 10000);

         System.out.println(failDate);

         mc.set("c", "230",failDate);        //如果有相同的key值，则替换掉原先的值  失效时间(以服务器的时间为准)

         Boolean add = mc.add("b", "110");                    //如果存在同样key值，则返回false

         String str = (String)mc.get("c");

         String[] keys = {"a","b"};

         Map strs = mc.getMulti(keys);        //获取多个值 返回结果是一个数组

         System.out.println("get value from memcached: " + str);

         mc.delete("c");                        //删除key

         System.out.println("test add method: " + add);

         System.out.println("get params: " + strs);

         //写入对象

         user men = new user();

         men.setId(1907);

         men.setName("潘腾");

         boolean setObj = mc.set("user", men);

         user getMen = (user)mc.get("user");

         System.out.println(getMen);

     }

 }

 class user implements Serializable{

     String name;

     int id;

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public int getId() {

         return id;

     }

     public void setId(int id) {

         this.id = id;

     }

     @Override

     public String toString() {

         // TODO Auto-generated method stub

         return "name: " + name + " id: " + id;

     }

 }

testMain

 package com.pt.util.memcached;

 import com.danga.MemCached.MemCachedClient;

 import com.danga.MemCached.SockIOPool;

 public class MemcachedTool {

     private static MemCachedClient memcacheClient = null;

     private MemcachedTool(){

     }

     public static MemCachedClient getInstance(){

         if(memcacheClient == null){

             memcacheClient = new MemCachedClient();

             memcacheClient.setDefaultEncoding("UTF-8");    //写入缓存的编码格式

         }

         return memcacheClient;

     }

     static{

         String[] serversArray = {"192.168.65.221:13220"};

         Integer[] weight = {1};

         SockIOPool connPool = SockIOPool.getInstance();

         connPool.setServers(serversArray);        //设置memcached服务器

         connPool.setWeights(weight);            //设置各个服务器存储权重

         connPool.setMinConn(3);                    //设置连接池的最小连接数目

         connPool.setInitConn(3);                //初始化可用连接数目

         connPool.setMaxIdle(10000);                //可用连接池最长等待时间

         connPool.setSocketTO(10000);            //读取等待超时值

         connPool.setSocketConnectTO(10000);        //连接等待超时值

         //心跳检测，设置为true时，每次通信都会先检测连接是否可用 增加IO和网络开销，一般设置为false 默认是false

         connPool.setAliveCheck(false);

         /**

          *  alg=0 使用String.hashCode()获得hash code,该方法依赖JDK，可能和其他客户端不兼容，建议不使用

          *    alg=1 使用original 兼容hash算法，兼容其他客户端

          *    alg=2 使用CRC32兼容hash算法，兼容其他客户端，性能优于original算法

          *    alg=3 使用MD5 hash算法

          *    采用前三种hash算法的时候，查找cache服务器使用余数方法。采用最后一种hash算法查找cache服务时使用consistent方法。

          **/

         connPool.setHashingAlg(3);

         //设置服务器宕机或连接由中断变为恢复后，该连接继续可用

         connPool.setFailback(true);

         //启动pool

         connPool.initialize();

     }

 }

MemcacheTool

需要引入：java-memcached-release_2.5.2.jar包