java 关闭套接字的输入流是否也会关闭套接字连接？
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Does closing the inputstream of a socket also close the socket connection?
提问by dolaameng
In Java API,
在 Java API 中，
Socket socket = serverSocket.accept();
BufferedReader fromSocket = new BufferedReader(new InputStreamReader(socket.getInputStream()));
PrintWriter toSocket = new PrintWriter(socket.getOutputStream());
//do sth with fromSocket ... and close it
fromSocket.close();
//then write to socket again
toSocket.print("is socket connection still available?\r\n");
//close socket
socket.close();
In the above code, after I close the InputStream fromSocket, it seems that the socket connection is not available anymore--the client wont receive the "is socket connection still available" message. Does that mean that closing the inputstream of a socket also closes the socket itself?
在上面的代码中，在我关闭 InputStream fromSocket 后，似乎套接字连接不再可用——客户端不会收到“套接字连接仍然可用”的消息。这是否意味着关闭套接字的输入流也会关闭套接字本身？
回答by Michael Goldshteyn
Yes, closing the input stream closes the socket. You need to use the shutdownInput method on socket, to close just the input stream:
是的，关闭输入流会关闭套接字。您需要在套接字上使用 shutdownInput 方法，以关闭输入流：
//do sth with fromSocket ... and close it
socket.shutdownInput();
Then, you can still send to the output socket
然后，您仍然可以发送到输出套接字
//then write to socket again
toSocket.print("is socket connection still available?\r\n");
//close socket
socket.close();
