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(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();
 
        }
        

/**
     * 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 = 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);
                }
                
          }
    }