Java通过http访问网页及xml及文件并保存到local

转自“http://blog.csdn.net/longronglin/archive/2008/04/24/2325214.aspx”

下面的是简易版,详细地可以根据此进行修改.比如文件后缀......

下面的代码进行过测试：


import java.io.File;


import java.io.FileOutputStream;


import java.io.IOException;


import java.io.InputStream;


import java.net.HttpURLConnection;


import java.net.MalformedURLException;


import java.net.URL;




/**


* Test 类


*


* @author Ma rulin


*


* @version 1.0


*


*/


public class Test {




/**


* 主程序入口


* @param args 输入参数数组


*/


public static void main(String[] args) {


System.out.println("beging...");


DownLoadPages("http://www.cctv.com/download/showtime.zip","e:/fileDown.zip");


System.out.println("end.");


}




/**


* 下载网页 或 文件


* @param urlStr 网页地址 比如: http://www.163.com

* @param outPath 文件输出路径


*/


public static void DownLoadPages(String urlStr, String outPath)


{


/** 读入输入流的数据长度 */


int chByte = 0;




/** 网络的url地址 */


URL url = null;




/** http连接 */


HttpURLConnection httpConn = null;




/** 输入流 */


InputStream in = null;




/** 文件输出流 */


FileOutputStream out = null;




try


{


url = new URL(urlStr);


httpConn = (HttpURLConnection) url.openConnection();


HttpURLConnection.setFollowRedirects(true);


httpConn.setRequestMethod("GET");


httpConn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");




in = httpConn.getInputStream();


out = new FileOutputStream(new File(outPath));




chByte = in.read();


while (chByte != -1)


{


out.write(chByte);


//System.out.println(chByte);


chByte = in.read();


}


}


catch (MalformedURLException e)


{


e.printStackTrace();


}


catch (IOException e)


{


e.printStackTrace();


}


finally


{


try


{


out.close();


in.close();


httpConn.disconnect();


}


catch (Exception ex)


{


ex.printStackTrace();


}


}


}






}



访问xml的测试如下:

DownLoadPages("http://blog.csdn.net/longronglin/Rss.aspx","e:/mrl.xml");

然后打开mrl.xml即可

其中的设置也可以模拟firefox,代码如下:

httpConn.setRequestProperty("User-Agent","Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14");