Question

抱歉英文不好，我用谷歌翻译。

处理需要通过网络传输文件且能够恢复的应用程序，该程序可以正常工作，但是为什么当您打开通过nano传输的文本文件时，看到数据是重复的。

服务器

OutputStream outToClient = socket.getOutputStream();

        File myfile = new File(filePath);
        System.out.println("файл " + myfile.toString());
        byte[] mybytearray = new byte[(int) myfile.length()];
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(myfile));

        BufferedOutputStream bost = new BufferedOutputStream(new FileOutputStream(new File(filePath+"111")));
        bost.write(mybytearray, 0, mybytearray.length);
        bis.skip(filePosition);
        bis.read(mybytearray, 0, mybytearray.length);
        bost.write(mybytearray, 0, mybytearray.length);
        outToClient.write(mybytearray, 0, mybytearray.length);


        outToClient.flush();
        bis.close();

客户端

 byte[] mybytearray = new byte[1024];
    fos = new FileOutputStream(fullPath, true);
    bos = new BufferedOutputStream(fos);
    InputStream is = socket.getInputStream();
    int bytesRead = is.read(mybytearray, 0, mybytearray.length);

    bos.write(mybytearray, 0, bytesRead);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    do {
        baos.write(mybytearray);
        bytesRead = is.read(mybytearray);

        if (bytesRead != -1)
            filePosition += bytesRead;
    } while (bytesRead != -1);

    bos.write(baos.toByteArray());
    bos.close();   socket.close();

    is.close();
    socket.close();

Answer 1

您将获得一些重复数据，因为在使用新数据填充数组之前，您将相同的数组内容写入输出文件两次。你没有很好地使用这些流。尝试更像这样的东西：

服务器

OutputStream outToClient = socket.getOutputStream();

byte[] mybytearray = new byte[1024];
File myfile = new File(filePath);
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(myfile));
bis.skip(filePosition);
do {
    int bytesRead = bis.read(mybytearray, 0, mybytearray.length);
    if (bytesRead <= 0) {
        break;
    }
    outToClient.write(mybytearray, 0, bytesRead);
}
white (true);

outToClient.flush();
bis.close();

客户端

byte[] mybytearray = new byte[1024];
//todo: seek the output file to the starting filePosition
//instead of just appending to the end of the file...
fos = new FileOutputStream(fullPath, true);
bos = new BufferedOutputStream(fos);
InputStream is = socket.getInputStream();
do {
    int bytesRead = is.read(mybytearray, 0, mybytearray.length);
    if (bytesRead <= 0) {
        break;
    }
    bos.write(mybytearray, 0, bytesRead);
    filePosition += bytesRead;
} while (true);

bos.close();
is.close();
socket.close();

通过套接字接收文件时重复数据

1 个答案: