《Java程序设计》第三次作业：网络编程

作业的目标

目标1：Socket简单应用。  把教材P238-230中例11-5代码输入到我们的代码编辑器，调试并运行（80分）。

P238客户端程序

import java.io.*;
import java.net.*;
public class ChatClient {
	public static void main(String args[]){
		try{
			Socket socket=new Socket("127.0.0.1",4001);
			System.out.println("输入你要说的话，如果要退出输入bye");
			BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
			PrintWriter os=new PrintWriter(socket.getOutputStream());
			BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));
			String readline;
			readline =sin.readLine();
			while(! readline.equals("bye")){
				os.println(readline);
				os.flush();
				System.out.println("Client:"+readline);
				System.out.println("Server:"+is.readLine());
				readline=sin.readLine();
			}
			os.close();
			is.close();
			socket.close();
		}catch(Exception e){
			System.out.println("Error"+e);
		}
	}
}

P238-230 服务器端程序

import java.io.*;
import java.net.*;
import java.applet.Applet;
public class ChatServer {
	public static void main(String args[]){
		try{
			ServerSocket server=null;
			try{
				server=new ServerSocket(4001);
				System.out.println("准备好了，退出输入bye");
			}catch(Exception e){
				System.out.println("can not listen to:"+e);
			}
			Socket socket=null;
			try{
				socket=server.accept();
			}catch(Exception e){
				System.out.println("Error."+e);
			}
			String line;
			BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));
			PrintWriter os=new PrintWriter(socket.getOutputStream());
			BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
			System.out.println("Client:"+is.readLine());
			line=sin.readLine();
			while(! line.equals("bye")){
				os.print(line);
				os.flush();
				System.out.println("Client:"+is.readLine());
				line=sin.readLine();
			}
			os.close();
			is.close();
			socket.close();
			server.close();
		}catch(Exception e){
			System.out.println("Error:"+e);
		}
	}
}