基于applet与ServerSocket的网络聊天室(记得是上学的时候写的,现在都忘了,记录一下)
源码下载:下载
http://down.0379zd.com/news/show/9001.htm
chatServer.java
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class chatServer extends JFrame {
//以下为图形界面变量
JPanel contentPane;
JMenuBar jMenuBar1 = new JMenuBar();
JMenu jMenuFile = new JMenu();
JMenuItem jMenuFileExit = new JMenuItem();
JMenu jMenuHelp = new JMenu();
JMenuItem jMenuHelpAbout = new JMenuItem();
JLabel statusBar = new JLabel();
BorderLayout borderLayout1 = new BorderLayout();
JPanel jPanel1 = new JPanel();
BorderLayout borderLayout2 = new BorderLayout();
JLabel jLabel1 = new JLabel();
static java.awt.List jList1 = new java.awt.List(13);
JScrollPane scrollpane=new JScrollPane(jList1);
//以下为网络相关变量
//用vector向量数组存储连接客户变量
static Vector clients=new Vector(10);
static ServerSocket server=null;//建立服务器socket
static int active_connects=0;//用来存储目前连接的客户数
static Socket socket=null;//用来存储一个套接字连接
//聊天服务器的main方法
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {
e.printStackTrace();
}
chatServer chatServer1=new chatServer();//实例化一个chatServer类
chatServer1.show();
System.out.println("正在启动服务器
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try
{
//使用端口2525初始化服务器套接字
server=new ServerSocket(2525);
}
catch(IOException e)
{
System.out.println("Error:"+e);
}
while(true)
{
//当客户数小于5个时开始连接
if(clients.size()<5)
{
try
{
//用来存储连接上的客户socket
socket=server.accept();
if(socket!=null)
{
//在控制台打印客户连接信息
System.out.println(socket+"连接");
}
}
catch(IOException e)
{
System.out.println("Error:"+e);
}
int i=0;
do{
//定义并实例化一个Client线程类,一个就对应一个客户连接
Client c=new Client(socket);
clients.addElement(c);//加入clients数组中
if(checkName(c))//调用checkName方法验证c的合法性
{
//定义connum来存储活动连接数
int connum=++chatServer1.active_connects;
//在状态栏里显示连接数
String constr="目前有"+connum+"个客户相连";
chatServer1.statusBar.setText(constr);
//将连接客户的socket信息存储进listdata数组
Client listdata=(Client)clients.elementAt(i);
//将客户socket信息写入list框
chatServer1.jList1.addItem(listdata.ip+"连接",i);
c.start();//启动线程
notifyRoom();//用notifyRoom方法来监视聊天室连接变化
//不断改变clients数组并刷新客户端信息
}
else
{
//如果名字不合法
c.ps.println("TAKEN");
disconnect(c);
}
i++;
break;
}
while(i<clients.size());
}
else//如果clients数组超过了5个
{
try{Thread.sleep(200);}
catch(InterruptedException e)
{
}
}
}
}
//chatServer类的构造函数,用来初始化一些UI信息
public chatServer()
{
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
//初始化组件
private void jbInit() throws Exception {
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(borderLayout1);
this.setSize(new Dimension(400, 300));
this.setTitle("简易聊天服务器端");
statusBar.setText("目前的连接数为:");
jMenuFile.setText("文件");
jMenuFileExit.setText("退出");
jMenuFileExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuFileExit_actionPerformed(e);
}
});
jMenuHelp.setText("帮助");
jMenuHelpAbout.setText("关于");
jMenuHelpAbout.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuHelpAbout_actionPerformed(e);
}
});
jPanel1.setLayout(borderLayout2);
jLabel1.setText("服务器端连接的客户:");
jMenuFile.add(jMenuFileExit);
jMenuHelp.add(jMenuHelpAbout);
jMenuBar1.add(jMenuFile);
jMenuBar1.add(jMenuHelp);
this.setJMenuBar(jMenuBar1);
contentPane.add(statusBar, BorderLayout.SOUTH);
contentPane.add(jPanel1, BorderLayout.CENTER);
jPanel1.add(jLabel1, BorderLayout.NORTH);
jPanel1.add(scrollpane, BorderLayout.CENTER);
}
//实现退出菜单方法
public void jMenuFileExit_actionPerformed(ActionEvent e)
{
//向客户端发送断开连接信息
sendClients(new StringBuffer("QUIT"));
closeAll();//调用closeAll方法关闭所有连接
System.exit(0);
}
//实现about对话框,意义不大,可以去掉
public void jMenuHelpAbout_actionPerformed(ActionEvent e)
{
chatServer_AboutBox dlg = new chatServer_AboutBox(this);
Dimension dlgSize = dlg.getPreferredSize();
Dimension frmSize = getSize();
Point loc = getLocation();
dlg.setLocation((frmSize.width - dlgSize.width) / 2 + loc.x, (frmSize.height - dlgSize.height) / 2 + loc.y);
dlg.setModal(true);
dlg.show();
}
//实现关闭服务器程序要进行的操作
protected void processWindowEvent(WindowEvent e)
{
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
jMenuFileExit_actionPerformed(null);
}
}
/*以下实现各种方法*/
//用来监视连接信息,不断刷新clients数组并刷新客户端用户列表信息
public static void notifyRoom()
{
StringBuffer people=new StringBuffer("PEOPLE");
for(int i=0;i<clients.size();i++)
{
Client c=(Client)clients.elementAt(i);
people.append(":"+c.name);
}
//用sendClients方法向客户端发送信息
sendClients(people);
}
//实现sendClients方法专用来向每个连接的客户端发送信息
public static synchronized void sendClients(StringBuffer msg)
{
for(int i=0;i<clients.size();i++)
{
Client c=(Client)clients.elementAt(i);
c.send(msg);
}
}
//实现关闭所有连接信息
public static void closeAll()
{
//遍历clients数组删除所有连接客户信息
while(clients.size()>0)
{
Client c=(Client)clients.firstElement();
try
{
c.socket.close();
}
catch(IOException e)
{
System.out.println("Error:"+e);
}
finally
{
clients.removeElement(c);
}
}
}
//实现检查连接客户的socket信息是否合法
public static boolean checkName(Client newclient)
{
for(int i=0;i<clients.size();i++)
{
Client c=(Client)clients.elementAt(i);
if((c!=newclient)&&c.equals(newclient.name))
return false;
}
return(true);
}
//实现断开单个客户的方法
public static synchronized void disconnect(Client c)
{
try
{
//在服务器端程序的list框中显示断开信息
jList1.addItem(c.ip+"断开连接");
//将连接数减1
chatServer.active_connects--;
//向客户发送断开连接信息
c.send(new StringBuffer("退出"));
c.socket.close();
}
catch(IOException e)
{
System.out.println("Error:"+e);
}
finally
{
//从clients数组中删除此客户的相关socket等信息
clients.removeElement(c);
}
}
}
//实现 Client线程类
class Client extends Thread
{
Socket socket;//用来存储一个连接客户的socket信息
String name;//用来存储客户的连接姓名
String ip;//用来存储客户的ip信息
DataInputStream dis;//用来实现接受从客户端发来的数据流
PrintStream ps;//用来实现向客户端发送信息的打印流
//实现想客户端发送信息的方法
public void send(StringBuffer msg)
{
ps.println(msg);//用打印流发送信息
ps.flush();
}
//Client线程类的构造器
public Client(Socket s)
{
socket=s;
try
{
//存储特定客户socket的输入流接受s这个客户发送到服务器端的信息
dis=new DataInputStream(s.getInputStream());
//存储特定客户socket的输出流发送服务器给s这个客户的信息
ps=new PrintStream(s.getOutputStream());
//读取接受来的信息
String info=dis.readLine();
//用StringTokenizer类来读取用":"分段字符
StringTokenizer stinfo=new StringTokenizer(info,":");
//head用来存储类似于关键字的头信息
String head=stinfo.nextToken();
if(stinfo.hasMoreTokens())
//关键字后的第二段数据是客户名信息
name=stinfo.nextToken();
if(stinfo.hasMoreTokens())
//关键字后的第三段数据是客户ip信息
ip=stinfo.nextToken();
//在控制台打印头信息
System.out.println(head);
}
catch(IOException e)
{
System.out.println("Error:"+e);
}
}
//线程运行方法
public void run()
{
while(true)
{
String line=null;
try
{
//读取客户端发来的数据流
line=dis.readLine();
}
catch(IOException e)
{
System.out.println("Error"+e);
chatServer.disconnect(this);
chatServer.notifyRoom();
return;
}
if(line==null)//客户已离开
{
chatServer.disconnect(this);
chatServer.notifyRoom();
return;
}
StringTokenizer st=new StringTokenizer(line,":");
String keyword=st.nextToken();
//如果关键字是MSG则是客户端发来的聊天信息
if(keyword.equals("MSG"))
{
//在服务器端再重新建立一个字符缓冲
StringBuffer msg=new StringBuffer("MSG:");
msg.append(name);
msg.append(st.nextToken("\0"));
//再将某个客户发来的聊天信息发送到每个连接客户的聊天栏中
chatServer.sendClients(msg);
}
//如果关键字是QUIT则是客户端发来断开连接的信息
else if(keyword.equals("退出"))
{
//服务器断开与这个客户的连接
chatServer.disconnect(this);
//继续监听聊天室并刷新其他客户的聊天人名list
chatServer.notifyRoom();
this.stop();
}
}
}
}
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
public class chatServer_AboutBox extends JDialog implements ActionListener {
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JPanel insetsPanel1 = new JPanel();
JPanel insetsPanel2 = new JPanel();
JPanel insetsPanel3 = new JPanel();
JButton button1 = new JButton();
JLabel imageLabel = new JLabel();
JLabel label1 = new JLabel();
JLabel label2 = new JLabel();
JLabel label3 = new JLabel();
JLabel label4 = new JLabel();
BorderLayout borderLayout1 = new BorderLayout();
BorderLayout borderLayout2 = new BorderLayout();
FlowLayout flowLayout1 = new FlowLayout();
GridLayout gridLayout1 = new GridLayout();
String product = "简易聊天服务器端";
String version = "1.0";
String copyright = "Copyright (c) 2002";
String comments = "本聊天室服务器端实现了多线程客户连接和显示连接信息";
public chatServer_AboutBox(Frame parent) {
super(parent);
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
pack();
}
//初始化组件
private void jbInit() throws Exception {
this.setTitle("关于");
setResizable(false);
panel1.setLayout(borderLayout1);
panel2.setLayout(borderLayout2);
insetsPanel1.setLayout(flowLayout1);
insetsPanel2.setLayout(flowLayout1);
insetsPanel2.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
gridLayout1.setRows(4);
gridLayout1.setColumns(1);
label1.setText(product);
label2.setText(version);
label3.setText(copyright);
label4.setText(comments);
insetsPanel3.setLayout(gridLayout1);
insetsPanel3.setBorder(BorderFactory.createEmptyBorder(10, 60, 10, 10));
button1.setText("确定");
button1.addActionListener(this);
insetsPanel2.add(imageLabel, null);
panel2.add(insetsPanel2, BorderLayout.WEST);
this.getContentPane().add(panel1, null);
insetsPanel3.add(label1, null);
insetsPanel3.add(label2, null);
insetsPanel3.add(label3, null);
insetsPanel3.add(label4, null);
panel2.add(insetsPanel3, BorderLayout.CENTER);
insetsPanel1.add(button1, null);
panel1.add(insetsPanel1, BorderLayout.SOUTH);
panel1.add(panel2, BorderLayout.NORTH);
}
//退出窗口
protected void processWindowEvent(WindowEvent e) {
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
cancel();
}
super.processWindowEvent(e);
}
//关闭对话框
void cancel() {
dispose();
}
//当单击按钮时,关闭对话框
public void actionPerformed(ActionEvent e) {
if (e.getSource() == button1) {
cancel();
}
}
}
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import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class chatApplet extends Applet {
/*以下用于定义UI变量*/
Panel panel1 = new Panel();//用于放置输入姓名和连接两个按钮
BorderLayout borderLayout1 = new BorderLayout();
Panel panel2 = new Panel();//用于放置聊天信息显示和聊天人员列表
Panel panel3 = new Panel();//用于放置发送信息区域
FlowLayout flowLayout1 = new FlowLayout();
FlowLayout flowLayout2 = new FlowLayout();
Label label1 = new Label();
TextField name_txt = new TextField(15);
Button button1 = new Button();
Button button2 = new Button();
TextArea chat_txt = new TextArea(15,30);
Label label2 = new Label();
Button button3 = new Button();
TextField msg_txt = new TextField(20);
java.awt.List list1 = new java.awt.List(13);
/*以下定义数据流和网络变量*/
Socket soc=null;//定义连接套接字
PrintStream ps=null;//定义打印流
Listen listen=null; //定义一个客户端线程
//初始化图形界面
public void init()
{
resize(475,350);
this.setLayout(borderLayout1);
panel2.setLayout(flowLayout1);
panel3.setLayout(flowLayout2);
label1.setText("姓名:");
button1.setLabel("连接");
button2.setLabel("断开连接");
chat_txt.setEditable(false);
panel2.setBackground(Color.cyan);
panel1.setBackground(Color.gray);
label2.setText("聊天信息:");
button3.setLabel("发送");
msg_txt.setText("请输入聊天信息");
panel3.setBackground(Color.gray);
this.add(panel1, BorderLayout.NORTH);
panel1.add(label1, null);
panel1.add(name_txt, null);
panel1.add(button1, null);
panel1.add(button2, null);
this.add(panel2, BorderLayout.CENTER);
panel2.add(chat_txt, null);
panel2.add(list1, null);
this.add(panel3, BorderLayout.SOUTH);
panel3.add(label2, null);
panel3.add(msg_txt, null);
panel3.add(button3, null);
}
//事件触发代码
public boolean action(Event evt,Object obj)
{
if(evt.target instanceof Button)
{
String label=(String) obj;
if(label.equals("连接"))//如果点击连接后
{
if(soc==null)
{
try
{
//使用端口2525实例化一个本地套接字
soc=new Socket(InetAddress.getLocalHost(),2525);
//在控制台打印实例化的结果
System.out.println(soc);
//将ps指向soc的输出流
ps=new PrintStream(soc.getOutputStream());
//定义一个字符缓冲存储发送信息
StringBuffer info=new StringBuffer("INFO: ");
//其中INFO为关键字让服务器识别为连接信息
//并将name和ip用":"分开,在服务器端将用一个
//StringTokenizer类来读取数据
String userinfo=name_txt.getText()+":"+InetAddress.getLocalHost().toString();
ps.println(info.append(userinfo));
ps.flush();
//将客户端线程实例化
listen=new Listen(this,name_txt.getText(),soc);
listen.start();//启动线程
}
catch(IOException e)
{
System.out.println("Error:"+e);
disconnect();
}
}
}
else if(label.equals("断开连接"))
{
//如果点击断开连接按钮则运行disconnect()
disconnect();
}
//如果点击发送按钮
else if(label.equals("发送"))
{
if(soc!=null)
{
//定义并实例化一个字符缓冲存储发送的聊天信息
StringBuffer msg=new StringBuffer("MSG: ");
//其中MSG为关键词
try
{
String msgtxt=new String(msg_txt.getText());
}
catch(Exception e){}
//用打印流发送聊天信息
ps.println(msg.append(msg_txt.getText()));
ps.flush();
}
}
}
return true;
}
//客户端点击断开连接要运行的方法
public void disconnect()
{
if(soc!=null)
{
try
{
listen.suspend();
//用打印流发送QUIT信息通知服务器断开此次通信
ps.println("QUIT");
ps.flush();
soc.close();//关闭套接字
}
catch(IOException e)
{
System.out.println("Error:"+e);
}
finally
{
}
}
}
//客户端线程类用来监听服务器传来的信息
class Listen extends Thread
{
//用来存储客户端连接后的name信息
String name=null;
//用来实现客户端接受服务器数据的输入流
DataInputStream dis=null;
//用来实现从客户端发送数据到服务器的打印流
PrintStream ps=null;
//用来存储客户端的socket信息
Socket socket=null;
//用来存储当前运行的chatApplet实例
chatApplet parent=null;
//Listen类的构造器
public Listen(chatApplet p,String n,Socket s)
{
//接受参数
parent=p;
name=n;
socket=s;
try
{
//实例化两个数据流
dis=new DataInputStream(s.getInputStream());
ps=new PrintStream(s.getOutputStream());
}
catch(IOException e)
{
System.out.println("Error:"+e);
parent.disconnect();
}
}
//线程运行方法
public void run()
{
String msg=null;
while(true)
{
//读取从服务器传来的信息
try{msg=dis.readLine();}
catch(IOException e)
{
System.out.println("Error:"+e);
parent.disconnect();
}
//如果从服务器传来的信息为空则断开此次连接
if (msg==null)
{
parent.listen=null;
parent.soc=null;
parent.list1.clear();
return;
}
//用StringTokenizer类来实现读取分段字符
StringTokenizer st=new StringTokenizer(msg,":");
//读取信息头即关键字用来识别是何种信息
String keyword=st.nextToken();
//如果是PEOPLE则是服务器发来的客户连接信息
if(keyword.equals("PEOPLE"))
//主要用来刷新客户端的用户列表
{
parent.list1.clear();
//遍历st取得目前所连接的客户
while(st.hasMoreTokens())
{
String str=st.nextToken();
parent.list1.addItem(str);
}
}
//如果关键字是MSG则是服务器传来的聊天信息
else if(keyword.equals("MSG"))
//主要用来刷新客户端聊天信息区将每个客户的聊天内容显示出来
{
String usr=st.nextToken();
parent.chat_txt.appendText(usr);
parent.chat_txt.appendText(st.nextToken("\0"));
parent.chat_txt.appendText("\n\n");
}
//如果关键字是QUIT则是服务器关闭的信息
else if(keyword.equals("QUIT"))
//用来切断此次连接
{
System.out.println("Quit");
try
{parent.listen.stop();
parent.listen=null;
parent.soc.close();
parent.soc=null;
}catch(IOException e)
{
System.out.println("Error:"+e);
}
parent.list1.clear();
return;
}
}
}
}
}
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