Java中通过URLConnection获取Http响应Header信息2013-07-17 qiyadeng 本文中演示如何通过URLConnection获取Http响应Header信息1.从响应中获得Header信息
URL obj = new URL("http://www.bianceng.cn");URLConnection conn = obj.openConnection();Map<String, List<String>> map = conn.getHeaderFields();
2.从响应Header中获取Server信息
Map<String, List<String>> map = conn.getHeaderFields(); List<String> server = map.get("Server");
完整的示例
package com.qiyadeng.http;import java.net.URL;import java.net.URLConnection;import java.util.List;import java.util.Map; public class GetHttpResponseHeader { public static void main(String[] args) { try { URL obj = new URL("http://www.bianceng.cn");URLConnection conn = obj.openConnection();Map<String, List<String>> map = conn.getHeaderFields(); System.out.println("显示响应Header信息...
"); for (Map.Entry<String, List<String>> entry : map.entrySet()) {System.out.println("Key : " + entry.getKey() +" ,Value : " + entry.getValue());} System.out.println("
使用key获得响应Header信息
");List<String> server = map.get("Server"); if (server == null) {System.out.println("Key "Server" is not found!");} else {for (String values : server) {System.out.println(values);}} } catch (Exception e) {e.printStackTrace();} } }输出显示响应Header信息...
Key : null ,Value : [HTTP/1.1 200 OK]Key : X-Pingback ,Value : [http://www.bianceng.cn/xmlrpc.php]Key : Date ,Value : [Sun, 10 Mar 2013 12:16:26 GMT]Key : Transfer-Encoding ,Value : [chunked]Key : Connection ,Value : [close]Key : Content-Type ,Value : [text/html; charset=UTF-8]Key : Server ,Value : [Apache/2.2.3 (CentOS)]Key : X-Powered-By ,Value : [PHP/5.2.17]使用key获得响应Header信息 ...Apache/2.2.3 (CentOS)
出处:http://www.qiyadeng.com/