Java 验证代理ip

 原文地址：http://www.cnblogs.com/junrong624/p/5416503.html

 1 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;
 /**<br>     * 批量代理IP有效检测<br>     *<br>     * @param IP<br>     * @param post<br>     */
 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();
         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") > ) {//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();

         }
         

 /**
      * 批量代理IP有效检测
      *
      * @param proxyIpMap
      * @param reqUrl
      */
     public static void checkProxyIp(Map<String, Integer> proxyIpMap, String reqUrl) {

           for (String proxyHost : proxyIpMap.keySet()) {
                 Integer proxyPort = proxyIpMap.get(proxyHost);

                 int statusCode = ;
                 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 = ;
                       // 读取数据超时时间（默认30秒 30000ms） 单位毫秒（ms）
                       int soTimeout = ;
                       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>){
                      System.out.format("%s:%s-->%sn", proxyHost, proxyPort,statusCode);
                 }

           }
     }