Java socket 双向通信

简单的一个socket通信

//客户机package Client;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.net.Socket;import java.net.UnknownHostException;import java.util.Scanner;public class Client {    public static void main(String args[]){        String host= "172.31.18.85";        int port=65200;        PrintWriter pw ;        BufferedReader br;        String CilentSay;        String temp;            try {                Socket socket = new Socket(host,port);                //状态提示                System.out.println("你已经成功链接服务端。。。");                Scanner in = new Scanner(System.in);                while(true){                    //接受来自服务器的消息                     br = new BufferedReader(new InputStreamReader(socket.getInputStream()));                     temp =br.readLine();                     System.out.print("  主服务器发来消息：");                    System.out.println(temp);                    //向服务起发送消息                     pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())));                     System.out.print("  向主服务器发消息：");                        CilentSay=in.nextLine();                        pw.println(CilentSay);                        pw.flush();                }            } catch (UnknownHostException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }}

//服务器package Server;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;import java.util.Scanner;public class Server {            public static void main(String args[]){                PrintWriter pw;                String temp;                String serverSay;                BufferedReader br;                try {                    ServerSocket serversocket = new ServerSocket(65200);                    System.out.println("服务器启动了...");                    Socket socket = serversocket.accept();                    System.out.println("客户机链接服务器");                    Scanner in =new Scanner(System.in);                    while(true){                        //向客户机发送消息                         pw = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())));                         System.out.print("  向客户机发消息：");                            serverSay=in.nextLine();                            pw.println(serverSay);                            pw.flush();                        //接受来自客户机的消息                          br = new BufferedReader                                    (new InputStreamReader(socket.getInputStream()));                             temp = br.readLine();                             System.out.print(socket.getInetAddress()+"  发来消息：");                            System.out.println(temp);                        }                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }}

遇到的困惑

这个socket用了一晚上才写出来，一直只能单向通讯，或者每次只能互发一条消息，最后我将我的发送消息的代码
`while（in.hasNext()）{
serverSay=in.nextLine();
pw.println(serverSay);
pw.flush();}
改 成

serverSay=in.nextLine();                            pw.println(serverSay);                            pw.flush();

去掉那个循环就能实现多次双向通信，有知道的同学请评论一下，向你请教一下。