javasocket不在while循环中发送数据
我正在尝试进行简单的网络通信,其中客户端向服务器发送用户输入字符串,然后服务器向控制台显示。 当我只发送一个字符串时,它可以正常工作,但只要我将用户输入代码打包并在while循环中发送代码,服务器就不会收到任何内容
服务器:
ServerSocket serverSocket = null;
try {
serverSocket = new ServerSocket(PORT);
System.out.println("Server now hosted on port " + PORT);
Socket s = serverSocket.accept();
System.out.println("A client has connected !");
BufferedInputStream bis = new BufferedInputStream(s.getInputStream());
BufferedOutputStream bos = new BufferedOutputStream(s.getOutputStream());
while(true){
//RECEIVE
int data;
String inString = "";
while((data=bis.read()) != -1){
inString += (char)data;
}
System.out.println("SLAVE : " + inString);
}
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println("Port déjà utilisé");
}finally {
try {
serverSocket.close();
System.out.println("Server closed");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("Could not close port " + PORT);
}
}
客户:
Scanner sc = new Scanner(System.in);
Socket s = null;
try {
s = new Socket("127.0.0.1", PORT);
BufferedInputStream bis = new BufferedInputStream(s.getInputStream());
BufferedOutputStream bos = new BufferedOutputStream(s.getOutputStream());
System.out.println("Connexion established !");
while(true){ // without this while loop, it works fine
String send = "";
System.out.print(">> ");
send = sc.nextLine();
bos.write(send.getBytes());
bos.flush();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("Could not connect");;
}
finally {
try {
s.close();
System.out.println("Closing socket");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.out.println("Could not close connection");;
}
}
System.out.println("End of client");
}
我希望服务器在提交时写入它从socket读取的任何数据。 但它什么也没做。 我不确定问题是来自服务器还是客户端
# 1 楼答案
问题在于
while((data=bis.read()) != -1){
代码它一直循环,直到收到EOS为止
-1
当您没有客户机循环时,您的流将关闭,允许发送
-1
,但当您有循环时则不允许。尝试使用服务器循环打印,如下所示