Java 套接字：DataOutputStream 还是 OutputStream？
我对套接字还比较陌生，我还没有看到有关此主题的任何信息。
要写入已连接的套接字，您可以使用
socket.getOutputStream().write
或从套接字 OutputStream 创建一个新的 DataOutputStream 并写入。
- 使用 DataOutputStream 或 OutputStream 什么被认为是“良好实践”？ 我在互联网上找到的大多数 示例 使用 DataOutputStream （发送字符串） ，例如双向聊天）。
- 与 OutputStream 相比，使用 DataOutputStream 有何优点或缺点？
- 例如，在发送文件时，两者之间的性能是否存在明显差异？
I'm still relatively new to sockets, and I haven't seen any information regarding this subject.
To write to a connected socket, you can either use
socket.getOutputStream().write
Or create a new DataOutputStream from the socket OutputStream and write to that.
- What is considered "good practice", using a DataOutputStream or OutputStream?
Most of the examples I find on the internet use DataOutputStream (to send Strings, such as in a two way chat). - Are there any advantages or disadvantages from using DataOutputStream over OutputStream?
- Is there any difference in performance that is noticeable between these two when, for example, sending files?
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DataOutputStream确保数据以独立于平台的方式格式化。这是很大的好处。它确保另一方能够阅读它。两者之间没有显着的性能差异。仅当传输原始二进制数据时才应使用
OutputStream。DataOutputStreammakes sure the data is formatted in a platform independent way. This is the big benefit. It makes sure the party on the other side will be able to read it. There is no significant performance difference between both.You should use
OutputStreamonly if you transfer raw binary data.如果您需要额外的 API，请使用 DataOutputStream。如果你不这样做，那就没有意义了。但是，如果您正在进行小型写入，则应始终将套接字的输出流包装在 BufferedOutputStream 中，并在适当的时候（例如在读取套接字之前）使用
flush()。Use
DataOutputStreamif you need the extra APIs. If you don't, there is no point. But you should always wrap the socket's output stream in aBufferedOutputStreamif you are doing small writes, andflush()when appropriate, i.e. before you read the socket for example.刚才我在使用 SOAP 服务时开始了解 dataoutputstream 和 outputstreamwriter 之间的区别...我尝试通过请求 XML 传递阿拉伯语数据，但在响应 XML 中我得到了一些垃圾字符来代替阿拉伯语数据，然后我尝试了对请求进行编码（UTF-8），但没有这样的方法可以在 DataOutputStream 中进行编码，因为您可以在发送请求之前在 OutputStreamWriter 中对请求进行编码。
OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream(), "UTF-8");
out.write(inputXML);
Just now I came to know a difference between dataoutputstream and outputstreamwriter while working with a SOAP services... I tried to pass arabic data through request XML but in the response XML I'm getting some junk characters in place of arabic data then I tried to encode (UTF-8) the request but there is no such method to encode in DataOutputStream where as you can encode the request in OutputStreamWriter before sending the request.
OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream(), "UTF-8");
out.write(inputXML);