Java并通过socket发送文件

Question

我编写了一个客户端-服务器应用程序，它将从客户端向服务器发送一个 .xml 文件。我在发送大数据时遇到问题。我注意到服务器最多可以获得 1460 个字节。当我发送超过 1460 字节的文件时，服务器只获得前 1460 字节，仅此而已。实际上我得到了未完成的文件。这是我的代码:

客户端发送:

public void sendToServer(File file) throws Exception
{
    OutputStream output = sk.getOutputStream();     

    FileInputStream fileInputStream = new FileInputStream(file);
    byte[] buffer = new byte[1024*1024];
    int bytesRead = 0;

    while((bytesRead = fileInputStream.read(buffer))>0)
    {
        output.write(buffer,0,bytesRead);
    }

    fileInputStream.close();
}

服务器获取:

public File getFile(String name) throws Exception
{
    File file=null;

    InputStream input = sk.getInputStream();

    file = new File("C://protokolPliki/" + name);
    FileOutputStream out = new FileOutputStream(file);

    byte[] buffer = new byte[1024*1024];

    int bytesReceived = 0;

    while((bytesReceived = input.read(buffer))>0) {
        out.write(buffer,0,bytesReceived);
        System.out.println(bytesReceived);
        break;
    }

    return file;
}

有人知道这段代码有什么问题吗？感谢您的帮助。

编辑:

没有任何帮助:(。我用谷歌搜索了一下，我认为它可能与 TCP MSS 连接，等于 1460 字节。

Answer 1

确保在流上调用 flush()。

---

A passerby asks: isn't close() enough?

您已链接到 Writer 的文档和信息。在 close() 上方法状态..

Closes the stream, flushing it first. ..

所以你部分正确，OTOH，OP 显然使用了 OutputStream 和 close() 的文档状态:

Closes this output stream and releases any system resources associated with this stream. The general contract of close is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened.

The close method of OutputStream does nothing.

(强调我的。)

总结一下。不，在普通 OutputStream 上调用 close() 不会有任何效果，并且可能会被编译器删除。