Java tests whether the URL address can be connected normally
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); // Set timeout status = oc.getResponseCode();// Request status if (200 == status) { // 200 is the smooth connection of the request address. . return status; } } catch (Exception e) { e.printStackTrace(); throw e; } return status; }An int type is defined. If it returns 200, the address can be connected successfully, and if it returns 0 or otherwise, it will fail.
Let's take a look at a piece of code about Java detecting whether the URL is available or openable
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; }}