/**
* Created by IntelliJ IDEA.
* User: chendt
* Date: 2008-7-25
* Time: 10:55:59
* To change this template use File | Settings | File Templates.
*/
import java.io.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.util.Date;
import java.text.SimpleDateFormat;
import javax.swing.*;
import java.io.FileOutputStream;
import java.net.*;
public class form extends Applet implements ActionListener
{
private Frame f;
private Button enter;
private Button cancle;
private Button exit;
private Button Entname;
private Button connect;
private TextField text,usename;
File file;
private TextArea ta;
public FileOutputStream dout=null;
public FileInputStream din =null;
byte[] buf = new byte[1024];
PrintWriter pout;
BufferedReader in;
Socket socket;
StringBuffer sb=new StringBuffer();
String name=""; //用于定义用户名
public static void main(String args[])
{
form myform=new form();
myform.go();
}
public void go()
{
f=new Frame("客户端");
f.setLayout(new FlowLayout());
enter=new Button("确定");
cancle=new Button("取消");
exit=new Button("退出");
connect=new Button("连接");
text=new TextField("在这里输入消息",70);
ta=new TextArea(15,70);
usename=new TextField("输入用户名",30);
Entname=new Button("使用名字");
ta.setEditable(false);
f.add(text);
f.add(enter);
f.add(cancle);
f.add(exit);
f.add(connect);
f.add(ta);
f.add(usename);
f.add(Entname);
f.setSize(600,400);
f.setVisible(true);
file=new File(".","Sent.txt");
ta.setText(readfile());
enter.addActionListener(this);
cancle.addActionListener(this);
exit.addActionListener(this);
connect.addActionListener(this);
Entname.addActionListener(this);
}
public void actionPerformed(ActionEvent e)
{
String str="";
if(e.getSource()==connect)
{
if(connect.getLabel().equals("连接"))
{
if(name.equals(""))
{
JOptionPane.showMessageDialog(null, "请先输入用户名");
}
else
{
try
{
socket=new Socket("10.17.178.165",2000); //开始连接服务器端
pout=new PrintWriter(socket.getOutputStream(),true);
pout.println(name);
connect.setLabel("断开");
} catch(IOException ioe){
JOptionPane.showMessageDialog(null, "连接不成功");
}
}
}
else
{
if(socket.isConnected())
{
try
{
socket.close();
}catch(IOException ioe){}
connect.setLabel("连接");
}
else
{
JOptionPane.showMessageDialog(null, "已断开!");
}
}
}
if(e.getSource()==enter)
{
if(text.getText().equals(""))
{
//提示不要发送空消息
JOptionPane.showMessageDialog(null, "还没输入东西呢!");
}
else
{
if(name.equals(""))
{
JOptionPane.showMessageDialog(null, "请先输入用户名!");
}
else
{
SimpleDateFormat m=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
str=m.format(new Date())+" "+name+" "+text.getText();
System.out.println(str);
ta.append(str+"\n");
try
{
//写入文件
///////////////////////////////////////////////////////////////
dout = new FileOutputStream(file,true); //true表示每次从文件尾写消息
str=str+"\r\n"; //window换行符
dout.write(str.getBytes());
///////////////////////////////////////////////////////////////
//发送消息
///////////////////////////////////////////////////////////////
pout.println(text.getText());
JOptionPane.showMessageDialog(null, "发送成功");
///////////////////////////////////////////////////////////////
}catch(IOException ioe){ }
text.setText("");
}
}
}
if(e.getSource()==cancle)
{
text.setText("");
}
if(e.getSource()==exit)
{
System.exit(0);
}
if(e.getSource()==Entname&&(!usename.getText().equals("")))
{
name=usename.getText();
usename.setVisible(false);
Entname.setVisible(false);
}
}
public String readfile()
{
///////////////////////////////////////////////
try
{
din=new FileInputStream(file);
while((din.read(buf))!=-1)
{
sb.append(new String(buf));
buf=new byte[1024];//重新生成，避免和上次读取的数据重复
}
}catch(IOException ioe){}
///////////////////////////////////////////////
return sb.toString();
}
}
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