小编Ars*_*ine的帖子

我想在我的Java代码中使用WiFi连接.如何使用特定的WiFi网络接口从Internet下载文件？

换句话说,我如何强制java通过特定的网络接口发送数据包？

我使用以下代码使用socket而不是url.openconnection()从指定的url下载文件; 下载后我检查它不工作...当我用编辑器打开文件时它是完全空白的文件内没有数据(空文件)需要建议??? ... ...

try {

    String address="http://tineye.com/images/widgets/mona.jpg";
    URL url_of_file=new URL(addres);
    String hostaddress=url_of_file.getHost();
    Socket mysocket=new Socket(hostaddress, 80);
    System.out.println("Socket opened to " + hostaddress + "\n");
    String file=url_of_file.getFile();
    System.out.println(" file = "+file);

    OutputStreamWriter osw=new OutputStreamWriter(mysocket.getOutputStream());

    osw.write("GET " + file + " HTTP/1.0\r\n\n"); 
    osw.flush(); 

    dis = new DataInputStream(mysocket.getInputStream());
    fileData = new byte[7850];

    for (int x = 0; fileData[x] > 0; x++){
         fileData[x] = (byte) dis.read();
    }

     // close the data input stream
    fos = new FileOutputStream(new File("C:\\Users\\down-to\\filedownloaded.jgp"));  //create an object representing the …