如何通过HttpURLConnection得到http 302的跳转地址

转载来源http://blog.csdn.net/yaerfeng/article/details/19031529

如果不想直接跳转到目标地址，想对中间的Location做些处理则可以通过HttpURLConnection实现。 // 必须设置false，否则会自动redirect到Location的地址 conn.setInstanceFollowRedirects(false);

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package com.zuidaima;  

  

import java.net.HttpURLConnection;  

import java.net.URL;  

  

/** 

 * 如何通过HttpURLConnection得到http 302的跳转地址 

 *  

 * @author javaniu 

 *  

 */  

public class Http302 {  

  

    public static void main(String[] args) {  

        try {  

            String url = "http://www.zuidaima.com/302.htm";  

            System.out.println("访问地址:" + url);  

            URL serverUrl = new URL(url);  

            HttpURLConnection conn = (HttpURLConnection) serverUrl  

                    .openConnection();  

            conn.setRequestMethod("GET");  

            // 必须设置false，否则会自动redirect到Location的地址  

            conn.setInstanceFollowRedirects(false);  

  

            conn.addRequestProperty("Accept-Charset", "UTF-8;");  

            conn.addRequestProperty("User-Agent",  

                    "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.8) Firefox/3.6.8");  

            conn.addRequestProperty("Referer", "http://zuidaima.com/");  

            conn.connect();  

            String location = conn.getHeaderField("Location");  

  

            serverUrl = new URL(location);  

            conn = (HttpURLConnection) serverUrl.openConnection();  

            conn.setRequestMethod("GET");  

  

            conn.addRequestProperty("Accept-Charset", "UTF-8;");  

            conn.addRequestProperty("User-Agent",  

                    "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.8) Firefox/3.6.8");  

            conn.addRequestProperty("Referer", "http://zuidaima.com/");  

            conn.connect();  

            System.out.println("跳转地址:" + location);  

  

        } catch (Exception e) {  

            e.printStackTrace();  

        }  

    }  

  

}  

  

                      



转载:http://www.zuidaima.com/share/1550463509482496.htm