java实现代理ip有效检测，依赖Apache的HttpClient
 
正式版：

      /**
       * 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) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                  }
                  System.out.format(“%s:%s–>%s
“, proxyHost, proxyPort, statusCode);
            }
      }
 
      /**
       * 代理IP有效检测
       *
       * @param proxyIp
       * @param proxyPort
       * @param reqUrl
       */
      public static void checkProxyIp(String proxyIp, int proxyPort, String reqUrl) {
            Map<String, Integer> proxyIpMap = new HashMap<String, Integer>();
            proxyIpMap.put(proxyIp, proxyPort);
            checkProxyIp(proxyIpMap, reqUrl);
      }
      
      public static void main(String[] args) {
            
            Map<String, Integer> proxyIpMap = new HashMap<String, Integer>();
            proxyIpMap.put(“114.80.136.112”, 7780);
            proxyIpMap.put(“114.80.136.166”, 7780);
            proxyIpMap.put(“114.80.136.167”, 7780);
            proxyIpMap.put(“114.80.136.168”, 7780);
            proxyIpMap.put(“114.80.136.169”, 7780);
            proxyIpMap.put(“114.80.136.170”, 7780);
            proxyIpMap.put(“114.80.136.171”, 7780);
            proxyIpMap.put(“123.129.207.102”, 7780);
            proxyIpMap.put(“123.129.207.100”, 7780);
            proxyIpMap.put(“123.129.207.103”, 7780);
            proxyIpMap.put(“123.129.207.104”, 7780);
            proxyIpMap.put(“123.129.207.105”, 7780);
            proxyIpMap.put(“123.129.207.108”, 7780);
            proxyIpMap.put(“114.80.136.164”, 7780);
            proxyIpMap.put(“123.129.207.107”, 7780);
            proxyIpMap.put(“180.153.251.3”, 7780);
            proxyIpMap.put(“180.153.251.4”, 7780);
            proxyIpMap.put(“180.153.251.5”, 7780);
            proxyIpMap.put(“180.153.251.6”, 7780);
            proxyIpMap.put(“180.153.251.7”, 7780);
            proxyIpMap.put(“180.153.251.8”, 7780);
            proxyIpMap.put(“180.153.251.9”, 7780);
            proxyIpMap.put(“180.153.251.10”, 7780);
            proxyIpMap.put(“180.153.251.11”, 7780);
            proxyIpMap.put(“180.153.251.12”, 7780);
            proxyIpMap.put(“180.153.251.13”, 7780);
            proxyIpMap.put(“180.153.251.14”, 7780);
            proxyIpMap.put(“180.153.251.15”, 7780);
            proxyIpMap.put(“180.153.251.16”, 7780);
            proxyIpMap.put(“180.153.251.2”, 7780);
            checkProxyIp(proxyIpMap, “http://t.sohu.com/new_index”);
 
      }