Memcached之执行报BasePoolableObjectFactory类找不到异常

package cache;

import com.danga.MemCached.MemCachedClient;
import com.danga.MemCached.SockIOPool;

public class CacheTest {
	public static void main(String[] args){
		/**
		 * 初始化SockIOPool,管理Memcached的连接池
		 */
		String[] servers = {"localhost:11211"};
		SockIOPool pool = SockIOPool.getInstance();
		pool.setServers(servers);
		pool.setFailover(true);
		pool.setInitConn(10);
		pool.setMinConn(5);
		pool.setMaxConn(250);
		pool.setMaintSleep(30);
		pool.setNagle(false);
		pool.setSocketTO(3000);
		pool.setAliveCheck(true);
		pool.initialize();
		/**
		 * 建立Memcached客户端程序
		 */
		MemCachedClient memCachedClient = new MemCachedClient();
		System.out.println("SET: " + memCachedClient.set("key1", "value1"));  
        System.out.println("SET: " + memCachedClient.set("key2", "value2"));  
        System.out.println("SET: " + memCachedClient.set("key3", "value3"));
        System.out.println("GET: " + memCachedClient.get("key1"));  
	}
}

在执行memcached测试程序时，控制台报错：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/pool/BasePoolableObjectFactory
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
	at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
	at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	at com.danga.MemCached.SockIOPool.getInstance(Unknown Source)
	at cache.CacheTest.main(CacheTest.java:12)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool.BasePoolableObjectFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	... 26 more

解决办法：

少commons-pool.jar包，导入某个版本的commons-pool包即可解决