Java Memcached的使用

最近也是用到了Memcached，所以借这个机会把这个也保存一下

废话不多说，直接上代码：

首先maven中引入需要的jar

<!-- https://mvnrepository.com/artifact/com.googlecode.xmemcached/xmemcached -->
<dependency>
 <groupId>com.googlecode.xmemcached</groupId>
 <artifactId>xmemcached</artifactId>
 <version>2.3.1</version>
</dependency>

然后创建一个类

package cp.pay.mj.utils;

import java.io.IOException;
import java.util.concurrent.TimeoutException;

import net.rubyeye.xmemcached.MemcachedClient;
import net.rubyeye.xmemcached.MemcachedClientBuilder;
import net.rubyeye.xmemcached.XMemcachedClientBuilder;
import net.rubyeye.xmemcached.exception.MemcachedException;
import net.rubyeye.xmemcached.utils.AddrUtil;

public class MemCachedTest {
    
    private static MemcachedClient cachedClient ; // memcached客户端单例
    protected static MemCachedTest memCached = new MemCachedTest(); 
    /**
    * 初始化连接池
    */
    static {
       System.out.println("初始化连接池");
       MemcachedClientBuilder builder = new XMemcachedClientBuilder(
                  AddrUtil.getAddresses ("需要的ip地址，及端口号"),new int[] {1});
       try {
         cachedClient =  builder.build();
      } catch (IOException e) {
         e.printStackTrace();
      }
    }

    protected MemCachedTest() { 

    } 
    

    public static MemCachedTest getInstance() { 
        return memCached; 
    } 
    
       public static boolean add(String key,  Integer expire, Object value) throws Exception{
          return cachedClient.add(key, expire, value);
       }
       public static boolean del(String key) throws Exception{
          return cachedClient.delete(key);
       }
       /**
       * 设置缓存中的对象（value），如果没有则插入，如果有则修改。
       * @param key
       * @param value
       * @param expire
       * @return
       */
       public static void set(String key,  Integer expire,Object value)  {
       try {
          cachedClient.set(key, expire,value);
      } catch (TimeoutException e) {
      } catch (InterruptedException e) {
      } catch (MemcachedException e) {
      }
       } 
       /**
       * 该键的新值（new value），如果有则修改。
       * @param key
       * @param value
       * @param expire
       * @return
       */
       public  static Object get(String key) {
       try {
         return cachedClient.get(key);
      } catch (Exception e) {
         e.printStackTrace();
         return null;
       }
      }

   public static void main(String[] args) {
      MemCachedTest.getInstance();
   }
}



然后在controller中，引用刚才创建的类，初始化链接

private static MemCachedTest memCached = MemCachedTest.getInstance();

然后在需要存的时候调用

memCached.set(phone, 0, "hello world");//0是设置过期时间，0为永久有效

获取的时候用

memCached.get(phone);

memCached的具体语法和用法请参考：

http://www.runoob.com/memcached/memcached-set-data.html

如果都配置成功后，在tomcat启动的时候就会有初始化连接池的输出，注意IP一定要写正确