The method of how to obtain the redirect URL of network 302 by Java
This article mainly introduces Java how to obtain the network 302 redirect URL method, the article is very detailed, has a certain reference value, interested friends must read it!
Method 1:
Import java.net.HttpURLConnection;import java.net.URL; import org.junit.Assert;import org.junit.Test; public class GetRedirectUrlTest {@ Test public void test_getRedirectUrl () throws Exception {String url= "http://www.baidu.com/link?url=ByBJLpHsj5nXx6DESXbmMjIrU5W4Eh0yg5wCQpe3kCQMlJK_RJBmdEYGm0DDTCoTDGaz7rH80gxjvtvoqJuYxK"; String expectUrl=" http://www.zhihu.com/question/20583607/answer/16597802"; String redictURL = getRedirectUrl (url); Assert.assertEquals (expectUrl, redictURL) } / * get the redirect address * @ param path * @ return * @ throws Exception * / private String getRedirectUrl (String path) throws Exception {HttpURLConnection conn = (HttpURLConnection) new URL (path) .openConnection (); conn.setInstanceFollowRedirects (false); conn.setConnectTimeout (5000); return conn.getHeaderField ("Location");}}
Method 2:
/ * handle the jump link to get the absolute address of the redirected address * @ param url source address * @ return destination web page * / public String getAbsUrl (String url) {CloseableHttpClient httpclient = HttpClients.createDefault (); HttpClientContext context = HttpClientContext.create (); HttpGet httpget = new HttpGet (url); CloseableHttpResponse response = null; String absUrl = null; try {response = httpclient.execute (httpget, context) HttpHost target = context.getTargetHost (); List redirectLocations = context.getRedirectLocations (); URI location = URIUtils.resolve (httpget.getURI (), target, redirectLocations); System.out.println ("Final HTTP location:" + location.toASCIIString ()); absUrl = location.toASCIIString ();} catch (IOException e) {e.printStackTrace ();} catch (URISyntaxException e) {e.printStackTrace () } finally {try {httpclient.close (); response.close ();} catch (IOException e) {e.printStackTrace ();}} return absUrl;} these are all the contents of this article "how to get Java to redirect URL from Network 302". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!
