import org.apache.commons.pool.PoolableObjectFactory; import org.apache.commons.pool.impl.GenericObjectPool; import org.apache.log4j.Logger; import com.gargoylesoftware.htmlunit.Brow import org.apache.commons.pool.PoolableObjectFactory; import org.apache.commons.pool.impl.GenericObjectPool; import org.apache.log4j.Logger; import com.gargoylesoftware.htmlunit.BrowserVersion; import com.gargoylesoftware.htmlunit.NicelyResynchronizingAjaxController; import com.gargoylesoftware.htmlunit.WebClient; //http://blog.csdn.net/m13321169565/article/details/8081410 public class PooledClientFactory{     private static Logger log = Logger.getLogger(PooledClientFactory.class);     private final static PooledClientFactory instance =new PooledClientFactory();     //另外一种方案或许更为合适——对象池化技术。     //基于Apache的commons-pool池     private final GenericObjectPool clientPool =new GenericObjectPool();     public static PooledClientFactory getInstance() {         return instance;     public PooledClientFactory(){         //实现对象池的对象创建工厂接口         clientPool.setFactory(new PoolableObjectFactory() {              // 创建对象实例，用于填充对象池。同时可以分配这个对象适用的资源。               @Override             public Object makeObject() throws Exception  {                 log.info("为线程 [ " + Thread.currentThread().getName()+                          " ] 创建新的WebClient实例!");                  WebClient webClient = new WebClient(BrowserVersion.FIREFOX_17);                      //设置webClient的相关参数                     webClient.getCookieManager().setCookiesEnabled(true);// 开启cookie管理                     webClient.getOptions().setJavaScriptEnabled(true);// 开启js解析                     webClient.getOptions().setCssEnabled(false);                     // 当出现Http error时，程序不抛异常继续执行                     webClient.getOptions().setThrowExceptionOnFailingStatusCode(false);                     // 防止js语法错误抛出异常                     webClient.getOptions().setThrowExceptionOnScriptError(false); // js运行错误时，是否抛出异常                     webClient.getOptions().setTimeout(10000);                     // 默认是false, 设置为true的话不让你的浏览行为被记录                     webClient.getOptions().setDoNotTrackEnabled(false);                     // 设置Ajax异步处理控制器即启用Ajax支持                     webClient                             .setAjaxController(new NicelyResynchronizingAjaxController());                     return webClient;              // 销毁对象,销毁对象池时被调用,连接池调用invalidateObject(obj)时被调用              @Override             public void destroyObject(Object arg0) throws Exception {                   log.info("销毁对象：" + arg0);                   WebClient client = (WebClient) arg0;                 client.closeAllWindows();                 client = null;             //  查询对象有效性,需要对象池设置setTestOnBorrow(true),无效对象将被destroy             @Override             public boolean validateObject(Object arg0) {                  log.info("检查对象有效性：" + arg0);                   return true;               // 激活一个对象,从对象池获取对象时被调用               @Override             public void activateObject(Object arg0) throws Exception {                  log.info("激活对象：" + arg0);                // 挂起(钝化)一个对象,将对象还给对象池时被调用             @Override             public void passivateObject(Object arg0) throws Exception {                  log.info("挂起对象：" + arg0);           clientPool.setTestOnBorrow(true);         //借出对象达到最大值的最大等待时间,5s等待时间过后抛出异常         //clientPool.setMaxWait(5000);         //设置最大可借出数量,默认为8         clientPool.setMaxActive(10);             return (WebClient)this.clientPool.borrowObject();         } catch (Exception e) {             e.printStackTrace();             return null;     public void returnClient(WebClient client) {         try {             this.clientPool.returnObject(client);         } catch (Exception e) {             e.printStackTrace();       //测试对象池       public static void main(String[] args) {           try {               //CursorableLinkedList             //得到池中空闲的对象数量,如果不可用返回负数                 log.info(PooledClientFactory.getInstance().clientPool.getNumIdle());        //取出对象1         Object obj1=    PooledClientFactory.getInstance().getClient();         //取出对象2         Object obj2=    PooledClientFactory.getInstance().getClient();         //取出对象3                 Object obj3=    PooledClientFactory.getInstance().getClient();                 //如果对象借出达到最大数量MaxActive,程序会一直等待有可用的对象(归还的),也可以通过DEFAULT_MAX_WAIT设置等待时间，默认为-1一直等待                 PooledClientFactory.getInstance().getClient();                     PooledClientFactory.getInstance().getClient();                     PooledClientFactory.getInstance().getClient();                     PooledClientFactory.getInstance().getClient();                     PooledClientFactory.getInstance().getClient();                     PooledClientFactory.getInstance().getClient();                 //归还对象1         PooledClientFactory.getInstance().returnClient((WebClient) obj1);         //得到池中空闲的对象数量         log.info(PooledClientFactory.getInstance().clientPool.getNumIdle());          //    返回从池中借出的对象数量         log.info(PooledClientFactory.getInstance().clientPool.getNumActive());         //最大可借出数量         log.info(PooledClientFactory.getInstance().clientPool.getMaxActive());         //最大空闲数量         log.info(PooledClientFactory.getInstance().clientPool.getMaxIdle());         //最小空闲数量         log.info(PooledClientFactory.getInstance().clientPool.getMinIdle());         PooledClientFactory.getInstance().clientPool.clear();         PooledClientFactory.getInstance().clientPool.close();         //使用工厂创建一个对象         PooledClientFactory.getInstance().clientPool.getMaxActive();         } catch (Exception e) {             e.printStackTrace();

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