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[英]Java - Strange behaviour on PrintStream with custom OutputStream
[英]Java PrintStream immediately to outputStream with Scanner and loop
我正在嘗試循環掃描儀讀取一行,立即通過 printStream 將其發送到應該打印它的客戶端,然后等待來自服務器的另一行。
我的客戶端在打印第一條消息后一直卡住,之后才返回 null。 我想我不應該在 Server.java 中調用 printStream.close(),但是直到我關閉它才會傳輸消息。 printSteam.flush 似乎沒有做任何事情。
相關代碼:
服務器端.java
ServerSocket serverSocket = new ServerSocket(1234);
Socket connectionSocket = serverSocket.accept();
OutputStream outputStream = connectionSocket.getOutputStream();
Scanner sc = new Scanner(System.in);
while(true) {
System.out.print("Pass me a message: ");
String input = sc.nextLine();
final PrintStream printStream = new PrintStream(outputStream);
printStream.print(input);
printStream.flush();
printStream.close();
}
客戶端.java
Socket connectionSocket = new Socket("localhost", 1234);
InputStream inputStream = connectionSocket.getInputStream();
String result = "";
BufferedReader inFromServer = new BufferedReader(new InputStreamReader(inputStream));
while (true) {
result = inFromServer.readLine();
System.out.println("Message: "+result);
}
感謝您的幫助!
關閉 PrintStream 后,它就完成了。 如果它后面有一個套接字連接,它將關閉該連接。 相反,在循環之外創建 PrintStream 並且不要關閉它
final PrintStream printStream = new PrintStream(outputStream);
while(true) {
System.out.print("Pass me a message: ");
String input = sc.nextLine();
printStream.print(input);
printStream.flush();
}
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