public static int testWsdlConnection(String address) throws Exception {  int status = 404;  try {   URL urlObj = new URL(address);   HttpURLConnection oc = (HttpURLConnection) urlObj.openConnection();   oc.setUseCaches(false);   oc.setConnectTimeout(3000); // 設置超時時間   status = oc.getResponseCode();// 請求狀態   if (200 == status) {    // 200是請求地址順利連通。。    return status;   }  } catch (Exception e) {   e.printStackTrace();   throw e;  }  return status; }

package test;import java.net.HttpURLConnection;import java.net.URL;import org.apache.log4j.Logger;public class CheskUrl {  private static Logger logger = Logger.getLogger(CheskUrl.class);  private static URL urlStr;  private static HttpURLConnection connection;  private static int state = -1;  private static String succ;  public synchronized String isConnect(String url) {   int counts = 0;   succ = null;   if (url == null || url.length() <= 0) {    return succ;   }   while (counts < 5) {    try {     urlStr = new URL(url);     connection = (HttpURLConnection) urlStr.openConnection();     state = connection.getResponseCode();     if (state == 200) {      succ = connection.getURL().toString();     }     break;    } catch (Exception ex) {     counts++; logger.info("loop :" + counts);     continue;    }   }   return succ;  }}