java socket 缓冲输出数据_socketoutputstream有没有缓冲-优快云博客

本文链接：https://blog.youkuaiyun.com/luna84/article/details/16941579

本文详细介绍了Java中DataOutputStream的基本用法及如何通过BufferedOutputStream实现缓冲功能，包括消息构建过程中的关键步骤。

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java 的 DataOutputStream 每次write的时候，就把数据发送出去了，如果想要实现缓冲功能，可以用 BufferedOutputStream来实现，代码片段如下：

BufferedOutputStream bufferedOutputStream;
	bufferedOutputStream = new BufferedOutputStream(socket.getOutputStream());
	
	//
	
	private void buildSendingMsg(byte[] msg, int protocol) {

		int msgSize = msg.length; // (9)'s length
		int bufferlen = msgSize + 86; // (1) ~ (9)total length
		int len = msgSize + 82; // (3) ~ (9) total length
		
		try {
			bufferedOutputStream.write(StreamTool.shortToByte((short)1));
			bufferedOutputStream.write(StreamTool.shortToByte((short)len));
			
			byte uuid[] = (ChatRoomData.uuid.toString()).getBytes("UTF-8");
			
			bufferedOutputStream.write(uuid);
			
			int leftSize = 64 -  uuid.length;
			
			for(int i =0 ; i< leftSize; i++)
			{
				bufferedOutputStream.write(0);
			}
			
			bufferedOutputStream.write(StreamTool.intToByte(4));
			bufferedOutputStream.write(StreamTool.intToByte(5));
			bufferedOutputStream.write(StreamTool.shortToByte((short)6));
			
			bufferedOutputStream.write(StreamTool.intToByte(protocol));
			bufferedOutputStream.write(StreamTool.intToByte(msgSize));
			
			bufferedOutputStream.write(msg);
			
			bufferedOutputStream.flush();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
	}