echoclient.java

java实现的简单客户端与服务器端的通讯

import java.io.*;
import java.net.*;

public class EchoClient {
    public static void main(String[] args) throws IOException {

        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;


out.print("input any message to get the content of the server's txt");
        try {
            echoSocket = new Socket("127.0.0.1", 4444);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(
                                        echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host: taranis.");
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for "
                               + "the connection to: taranis.");
            System.exit(1);
        }

        BufferedReader stdIn = new BufferedReader(
                                   new InputStreamReader(System.in));
        String userInput;

        while (true){
            userInput = stdIn.readLine();

            out.println(userInput);
            System.out.println("echo: " + in.readLine());

            if(in.readLine().equalsIgnoreCase("Bye"))
                break;
        }

        out.close();
        in.close();
        stdIn.close();
        echoSocket.close();
    }
}