從網址上下載檔案 by java

使用 URLConnection 就是了

範例碼如下

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.net.URL;

import java.net.URLConnection;

import java.util.Properties;

public class DownloadFileFromWeb {

public static void main(String[] args) throws IOException {

BufferedInputStream WebSource = null;

// set source file url

URL sourceFile = new URL("http://sites.google.com/site/catonchuang/Home/Taipei.gif");

// connect

URLConnection con = sourceFile.openConnection();

//System.out.println(con.getContentLength());

//con.connect();

// set Save file buffer

FileOutputStream SaveBuffer = null;

// get file

WebSource = new BufferedInputStream(con.getInputStream());

// set file Position

File FilePosition = new File("C:\\Taipei.gif");

SaveBuffer = new FileOutputStream(FilePosition);

// save into file

byte[] buf = new byte[1024];

int len;

while ((len = WebSource.read(buf)) > 0){

SaveBuffer.write(buf, 0, len);

}

// close buffer

WebSource.close();

SaveBuffer.close();

}

}