java知识点 --文件下载示例

package Run;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

class Main {
    public static void main(String[] args)
    {
        try {
            URL url = new URL("http://dl6.jnyxx.com/soft3/vim.zip"); //url描述
            URLConnection con = url.openConnection(); //打开文件连接
            InputStream in = con.getInputStream(); //获取网络文件的输入流
            FileOutputStream fs = new FileOutputStream("d:/vim.zip"); //本地存储文件
            byte[] buf = new byte[1024]; //缓冲区
            
            int bytes = -1;
            while ( (bytes = in.read(buf)) != -1)
            {
                fs.write(buf, 0, bytes); //写入
            }
            fs.close();
        } catch (MalformedURLException e) {
            System.out.println("URL非法!");
        } catch (IOException e) {
            System.out.println("无法打开链接!");
        }
    }
}