洛阳北大青鸟:Java是如何获取Http响应Header信息?
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
URLConnection conn = obj.openConnection();
Map
2.从响应Header中获取Server信息
Map
List 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
URLConnection conn = obj.openConnection();
Map
System.out.println("显示响应Header信息\n");
for (Map.Entry
System.out.println("Key : " + entry.getKey() +
" ,Value : " + entry.getValue());
}
System.out.println("\n使用key获得响应Header信息\n");
List 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 :
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)