java 检测代理IP是否准确

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<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);
                }

          }
    }