以下程序在jdk1.4.1中调试通过;
OS : Windows XP
本程序有一个空发消息的处理问题,希望大家多多指教!
mainto:yzmhacke.163.com
客户端的程序:
//Client.java
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
public class Client extends Frame implements
ActionListener,Runnable{
private TextField tf1,tf2;
private Label la1,la2;
private TextArea ta1,ta2;
private Socket s;
private Button b,l;
private BufferedReader br=null;
private PrintWriter pw=null;
// static String port,ip;
public static void main(String arg[]) {
new Client();
//if(arg[0].length()!=0) ip=arg[0];
//if(arg[1].length()!=0) port=arg[1];
}
//完成构造函数的说明
public Client(){
//完成ip地址与端口的建立
setLayout(new GridLayout(6,1));
Panel panel=new Panel();
tf1=new TextField(20);
tf2=new TextField(10);
la1=new Label("IP地址 ");
la2=new Label("对应端口 ");
Button l=new Button("连接");
l.setBackground(Color.green);
//l.addActionListener(this);
panel.add(la1);
panel.add(tf1);
panel.add(la2);
panel.add(tf2);
panel.add(l);
add(panel);
//输入框与显示框
ta1=new TextArea(100,300);
add(new Label("消息框"));
add(ta1);
add(new Label("用户输入框"));
ta2=new TextArea(30,300);
add(ta2);
Panel p2=new Panel();
b=new Button("发送");
b.setBackground(Color.yellow);
p2.add(b);
add(p2);
setTitle("客户端");
setSize(300,450);
setResizable(false);
setVisible(true);
//捕获各种的异常
l.addActionListener(this);
// b.addActionListener(this);
//增加了一个关闭的事件
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent exit){ System.exit(0);}});
Thread ThreadReader=new Thread(this);
ThreadReader.start();
b.addActionListener(this);
}
public void run(){
while(true){
try{
ta1.append("\n #_____________________________#\n"+br.readLine());
}catch(Exception exo){}
}
}
//客户向服务端发送消息啊！
public void actionPerformed(ActionEvent e)
{ String command=e.getActionCommand();
if("发送".equals(command))
{
if(ta2.getText().trim()!=null)
{
ta1.append("\n 客户端的消息：\n"+ta2.getText());
pw.println(ta2.getText()+"\n");//" \n 客户短信： \n "
}
else
if(ta2.getText().trim()==null)
{ ta1.append("请输入完整的IP地址与端口以及、\n"+"不能空发消息");}
ta2.setText(" "); //结束的时候清空文本框
}
else
if("连接".equals(command)){
try
{
//借助连接的按钮完成远程pc的连接的工作。建立输入与输出流两个工具
s=new Socket(tf1.getText().toString(),Integer.parseInt((tf2.getText()).trim()));
//Integer.parseInt((tf2.getText()).trim())
br=new BufferedReader(new InputStreamReader(s.getInputStream()));
pw=new PrintWriter(s.getOutputStream(),true);
//ta1.append("\n 服务端来消息：\n"+br.readLine());
}
catch(Exception ex){
//ta1.append("产生了输入输出异常无法完成交互！");
}
}
}
}
/*******************服务端的程序*************************/
//Server.java
package server;
import java.io.*;
import java.awt.*;
import java.net.*;
import java.awt.event.*;
public class Server{
public static void main(String arg[]){
ServerService MyServer=new ServerService(8000,10);
}
}
//交互端的服务窗口
class ServiceThread extends Frame
implements ActionListener,Runnable{
ServerService FatherListener;
Socket ConnectedClient;
Thread ConnectedThread;
Panel ListenePanel;
TextArea ServerMeg;
TextArea ServerWrite;
Label la;
Button bt;
BufferedReader in;
PrintWriter out;
public ServiceThread(ServerService sv,Socket s){
//容器与格子组建的结合
FatherListener=sv;
ConnectedClient=s;
ConnectedThread =new Thread(this);
//采用线程的目的是利用他的并发机制，实现多个任务
//在当前的类中(this)通过Runnabel()接口实现Thread()的Run()方案
setTitle("Answer Client");
setLayout(new GridLayout(4,1));
//采用格子组建的形式完成组建的安排
ServerMeg=new TextArea(null,5,45,TextArea.SCROLLBARS_VERTICAL_ONLY);
//添加各种组建到容器当中
ListenePanel=new Panel();
ListenePanel.add(ServerMeg);
add(ListenePanel);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
//((Frame)e.getWindow()).dispose();//保留的语句
System.exit(0);
}});
//第二个Panel()
la=new Label("服务端消息输入框...............");
add(la);
ServerWrite=new TextArea(10,50);
add(ServerWrite);
//add(p2);
setSize(355,360);
Panel p3=new Panel();
bt=new Button("传送");
bt.addActionListener(this);
p3.add(bt);
add(p3);
setResizable(false);
