我这里提供2个方法都可以实现：第一个是createIPAddress（）和convertStreamToString（）

  

import java.io.IOException;import java.io.InputStream;import java.net.InetSocketAddress;import java.net.Proxy;import java.net.URL;import java.net.URLConnection;import java.nio.charset.Charset;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.io.BufferedReader;import java.io.InputStreamReader;/**      * 批量代理IP有效检测      *      * @param IP      * @param post      */public static void createIPAddress(String ip,int port) {		URL url = null;		try {		url = new URL("http://www.baidu.com");		} catch (MalformedURLException e) {		System.out.println("url invalidate");		}		InetSocketAddress addr = null;		addr = new InetSocketAddress(ip, port);		Proxy proxy = new Proxy(Proxy.Type.HTTP, addr); // http proxy		InputStream in = null;		try {		URLConnection conn = url.openConnection(proxy);		conn.setConnectTimeout(1000);		in = conn.getInputStream();		} catch (Exception e) {		System.out.println("ip " + ip + " is not aviable");//异常IP		}		String s = convertStreamToString(in);		System.out.println(s);		// System.out.println(s);		if (s.indexOf("baidu") > 0) {//有效IP		System.out.println(ip + ":"+port+ " is ok");		}		}			public static String convertStreamToString(InputStream is) {		if (is == null)		return "";		BufferedReader reader = new BufferedReader(new InputStreamReader(is));		StringBuilder sb = new StringBuilder();		String line = null;		try {		while ((line = reader.readLine()) != null) {		sb.append(line + "/n");		}		} catch (IOException e) {		e.printStackTrace();		} finally {		try {		is.close();		} catch (IOException e) {		e.printStackTrace();		}		}		return sb.toString();		}

 

第二个方法是checkProxyIp（）

     

/**     * 批量代理IP有效检测     *     * @param proxyIpMap     * @param reqUrl     */    public static void checkProxyIp(Map
     
       proxyIpMap, String reqUrl) {          for (String proxyHost : proxyIpMap.keySet()) {                Integer proxyPort = proxyIpMap.get(proxyHost);                int statusCode = 0;                try {                      HttpClient httpClient = new HttpClient();                      httpClient.getHostConfiguration().setProxy(proxyHost, proxyPort);                      // 连接超时时间（默认10秒 10000ms） 单位毫秒（ms）                      int connectionTimeout = 10000;                      // 读取数据超时时间（默认30秒 30000ms） 单位毫秒（ms）                      int soTimeout = 30000;                      httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(connectionTimeout);                      httpClient.getHttpConnectionManager().getParams().setSoTimeout(soTimeout);                      HttpMethod method = new GetMethod(reqUrl);                      statusCode = httpClient.executeMethod(method);                } catch (Exception e) {                	System.out.println("ip " + proxyHost + " is not aviable");                }                if(statusCode>0){                	 System.out.format("%s:%s-->%sn", proxyHost, proxyPort,statusCode);                }                         }    }