一个简单的Java网络编程代码

Client:package cn.meiwenhui.tes;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.Socket;import java.net.UnknownHostException;public class Client {public static void main(String[] args) {try {Socket client=new Socket("127.0.0.1",Server.POST);BufferedReader reder=new BufferedReader(new InputStreamReader(client.getInputStream()));PrintWriter write = new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())), true);while(true){System.out.println("Client input line :");InputStreamReader isr = new InputStreamReader(System.in);BufferedReader br = new BufferedReader(isr);String message="";try {message = br.readLine();write.println(message);String fromServerString = reder.readLine();System.out.println("Server say:" + fromServerString);write.flush();if (message.equals("bye")) {System.out.println("自己下线");break;}} catch (IOException e) {e.printStackTrace();}}reder.close();write.close();client.close();} catch (UnknownHostException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}Server:package cn.meiwenhui.tes;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.ServerSocket;import java.net.Socket;public class Server {public static final int POST=6521;public static void main(String[] args) {try {ServerSocket server = new ServerSocket(POST);System.out.println(".......................................");Socket client = server.accept();BufferedReader reder = new BufferedReader(new InputStreamReader(client.getInputStream()));PrintWriter write = new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())), true);while(true){String fromClientString = reder.readLine();System.out.println("Client say:" + fromClientString);System.out.println("Server input line :");InputStreamReader isr = new InputStreamReader(System.in);BufferedReader br = new BufferedReader(isr);String message="";try {message = br.readLine();write.println(message);write.flush();if (message.equals("bye")) {System.out.println("自己下线");break;}} catch (IOException e) {e.printStackTrace();}}reder.close();write.close();server.close();client.close();} catch (IOException e) {e.printStackTrace();}}}