Question

我有一个使用套接字使用服务器发送的信息更新计算机上文件的程序。我的方式有用，但我想让它更直观，更简单，更可靠等等，这里是前面的代码：

int filesize = 6022386; // filesize temporary hardcoded

    int bytesRead;
    int current = 0;

    /**
     *  receive file
     */
    try {
        byte[] byteArray = new byte[filesize];
        java.io.InputStream inStream = socket.getInputStream();
        bytesRead = inStream.read(byteArray, 0, byteArray.length);
        FileOutputStream fileOutStream = new FileOutputStream(
                "C:\\Program Files\\AVTECH\\NPS\\Files\\bin\\NPS Game.txt");
        BufferedOutputStream buffOutStream = new BufferedOutputStream(
                fileOutStream);
        current = bytesRead;

        do {
            bytesRead = inStream.read(byteArray, current,
                    (byteArray.length - current));
            if (bytesRead >= 0)
                current += bytesRead;
        } while (bytesRead > -1);

        buffOutStream.write(byteArray, 0, current);
        buffOutStream.flush();
        buffOutStream.close();
        inStream.close();
        socket.close();
    } catch (Exception e) {
        e.printStackTrace();
        socket.close();
    }

如您所见，在do, while循环中，它使用输入流来获取数据。现在我已经更新了我的程序，我让流发送了一个名为UpdateObject的对象，它保存了byte[]数组和文件目录。这是代码：

    int filesize = 6022386; // filesize temporary hardcoded

    int bytesRead;
    int current = 0;
    try {
        byte[] byteArray = o.getFile();
         java.io.InputStream inStream = socket.getInputStream();
         bytesRead = inStream.read(byteArray, 0, byteArray.length);

        FileOutputStream fileOutStream = new FileOutputStream(o.getPath());
        BufferedOutputStream buffOutStream = new BufferedOutputStream(
                fileOutStream);
        current = bytesRead;

        do {
            bytesRead = inStream.read(byteArray, current,
                    (byteArray.length - current));
            if (bytesRead >= 0)
                current += bytesRead;
        } while (bytesRead > -1);

        buffOutStream.write(byteArray, 0, current);
        buffOutStream.flush();
        buffOutStream.close();
        inStream.close();
        socket.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

现在我的问题是：如何更改它而不是使用instream，只使用通过套接字发送的UpdateObject中的byte []对象？我已经做了一些谷歌搜索，但我不觉得我知道正确的问题。任何帮助都会很棒！提前谢谢!!!

Answer 1

将try catch块中的大部分代码替换为：

FileOutputStream fileOutStream = new FileOutputStream(
    UpdateObject.getDirectory()+"\\NPS Game.txt");
fileOutStream.write(UpdateObject.getBytes()); //this is the byte[] array
fileOutStream.close();

希望这有帮助。

Java更新程序问题

1 个答案: