文章目录
- 前言
- 一、项目设计
- 1. 模块设计
- 服务器模块设计
- 客户端模块设计
- 2. 实现效果
- 二、部分源码
- 项目源码
前言
今天学长向大家分享一个 java 设计项目:
基于Java聊天室系统的设计与实现
一、项目设计
1. 模块设计
服务器模块设计
服务端的功能主要如下：
- 一：能够开启和关闭服务器。
- 二：等待着客户端从特殊端口发送的请求。
- 三：监听的端口并不是固定的，服务端的端口是能够自定义的。
- 四：能够广播消息向所有连接到服务器的用户。
客户端和服务器之间通过socket套接字进行连接，socket的使用在java当中并不复杂，十分的简单。API提供了一个专门的类来处理，让编写程序变得十分简单。多线程的技术在服务器端得到了充分的体现，服务器能够同时处理来自不同IP的客户端的请求。通过循环调用serversocket对象的方法来监听是否有来自客户端的请求。
客户端模块设计
客户端的功能主要如下：
- 一：能够和服务端进行连接。
- 二：新的用户能够注册账号。
- 三：通过用户名以及密码完成用户的登陆，连接到聊天室。
- 四：用户能够在聊天室发送消息。
客户端通过socket与服务器建立连接。通过java对象的流来进行信息的传递，服务器接受请求返回对象，然后返回给客户端信息。不同的客户端的信息在服务端能够进行不同的处理。
2. 实现效果
服务器界面
登录界面
用户聊天界面
二、部分源码
部分代码示例：
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import java.util.*;
public class ChatRoom extends Thread implements ActionListener {
static JFrame frmChat;
JPanel pnlChat;
JButton btnCls, btnExit, btnSend, btnClear, btnSave;
JLabel lblUserList, lblUserMessage, lblSendMessage, lblChatUser;
JLabel lblUserTotal, lblCount, lblBack;
JTextField txtMessage;
java.awt.List lstUserList;
TextArea taUserMessage;
JComboBox cmbUser;
JCheckBox chPrivateChat;
String strServerIp, strLoginName;
Thread thread;
final JLabel headLabel = new JLabel();
Dimension scrnsize;
Toolkit toolkit = Toolkit.getDefaultToolkit();
Message messobj = null;
String serverMessage = "";
// ���췽��
public ChatRoom(String name, String ip) {
strServerIp = ip;
strLoginName = name;
frmChat = new JFrame("������" + "[�û�:" + name + "]");
pnlChat = new JPanel();
frmChat.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frmChat.getContentPane().add(pnlChat);
Font fntDisp1 = new Font("����", Font.PLAIN, 12);
String list[] = { "������" };
btnCls = new JButton("����");
btnExit = new JButton("�˳�");
btnSend = new JButton("����");
btnSave = new JButton("����");
lblUserList = new JLabel("�������û��б���");
lblUserMessage = new JLabel("��������Ϣ��");
lblSendMessage = new JLabel("��������:");
lblChatUser = new JLabel("���:");
lblUserTotal = new JLabel("��������:");
lblCount = new JLabel("0");
lstUserList = new java.awt.List();
txtMessage = new JTextField(170);
cmbUser = new JComboBox(list);
cmbUser.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent arg0) {
freshHead();
}
});
chPrivateChat = new JCheckBox("˽��");
taUserMessage = new TextArea("", 300, 200,
TextArea.SCROLLBARS_VERTICAL_ONLY);// ֻ�����¹���
taUserMessage.setForeground(new Color(0, 0, 0));
taUserMessage.setEditable(false); // �����
pnlChat.setLayout(null);
pnlChat.setBackground(new Color(52, 130, 203));
btnSave.setBounds(500, 330, 80, 25);
btnCls.setBounds(400, 330, 80, 25);
btnExit.setBounds(500, 360, 80, 25);
btnSend.setBounds(500, 300, 80, 25);
lblUserList.setBounds(5, 0, 120, 40);
lblUserTotal.setBounds(130, 0, 60, 40);
lblCount.setBounds(190, 0, 60, 40);
lblUserMessage.setBounds(225, 0, 180, 40);
lblChatUser.setBounds(10, 290, 40, 40);
lblSendMessage.setBounds(210, 290, 60, 40);
lstUserList.setBounds(5, 40, 210, 255);
taUserMessage.setBounds(225, 40, 360, 255);
txtMessage.setBounds(270, 300, 210, 25);
cmbUser.setBounds(50, 300, 80, 25);
chPrivateChat.setBounds(333, 336, 60, 20);
btnCls.setFont(fntDisp1);
btnExit.setFont(fntDisp1);
btnSend.setFont(fntDisp1);
btnSave.setFont(fntDisp1);
lblUserList.setFont(fntDisp1);
lblUserMessage.setFont(fntDisp1);
lblChatUser.setFont(fntDisp1);
lblSendMessage.setFont(fntDisp1);
lblUserTotal.setFont(fntDisp1);
lblCount.setFont(fntDisp1);
cmbUser.setFont(fntDisp1);
chPrivateChat.setFont(fntDisp1);
lblUserList.setForeground(Color.YELLOW);
lblUserMessage.setForeground(Color.YELLOW);
lblSendMessage.setForeground(Color.black);
lblChatUser.setForeground(Color.black);
lblSendMessage.setForeground(Color.black);
lblUserTotal.setForeground(Color.YELLOW);
lblCount.setForeground(Color.YELLOW);
cmbUser.setForeground(Color.black);
chPrivateChat.setForeground(Color.black);
lstUserList.setBackground(Color.white);
taUserMessage.setBackground(Color.white);
btnCls.setBackground(Color.ORANGE);
btnExit.setBackground(Color.ORANGE);
btnSend.setBackground(Color.PINK);
btnSave.setBackground(Color.ORANGE);
pnlChat.add(btnCls);
pnlChat.add(btnExit);
pnlChat.add(btnSend);
pnlChat.add(btnSave);
pnlChat.add(lblUserList);
pnlChat.add(lblUserMessage);
pnlChat.add(lblSendMessage);
pnlChat.add(lblChatUser);
pnlChat.add(lblUserTotal);
pnlChat.add(lblCount);
pnlChat.add(lstUserList);
pnlChat.add(taUserMessage);
pnlChat.add(txtMessage);
pnlChat.add(cmbUser);
pnlChat.add(chPrivateChat);
frmChat.addWindowListener(new Windowclose());
btnCls.addActionListener(this);
btnExit.addActionListener(this);
btnSend.addActionListener(this);
btnSave.addActionListener(this);
lstUserList.addActionListener(this);
txtMessage.addActionListener(this);
headLabel.setHorizontalAlignment(SwingConstants.CENTER);
headLabel.setIcon(new ImageIcon("face//1.JPG"));
headLabel.setBounds(15, 335, 70, 60);
pnlChat.add(headLabel);
// ��������ҳ����Ϣˢ���߳�
Thread thread = new Thread(this);
thread.start();
frmChat.setSize(600, 420);
frmChat.setVisible(true);
frmChat.setResizable(false);
// �����ڶ�λ����Ļ����
scrnsize = toolkit.getScreenSize();
frmChat.setLocation(scrnsize.width / 2 - frmChat.getWidth() / 2,
scrnsize.height / 2 - frmChat.getHeight() / 2);
Image img = toolkit.getImage("images\\appico.jpg");
frmChat.setIconImage(img);
} // ���췽������
@SuppressWarnings("deprecation")
public void run() {
int intMessageCounter = 0;
int intUserTotal = 0;
boolean isFirstLogin = true; // �ж��Ƿ�յ�½
boolean isFound; // �ж��Ƿ��ҵ��û�
Vector user_exit = new Vector();
try {
for (;;) {
Socket toServer;
toServer = new Socket(strServerIp, 1001);
// ����Ϣ����������
messobj = new Message();
ObjectOutputStream streamtoserver = new ObjectOutputStream(
toServer.getOutputStream());
streamtoserver.writeObject((Message) messobj);
// �����Է���������Ϣ
ObjectInputStream streamfromserver = new ObjectInputStream(
toServer.getInputStream());
messobj = (Message) streamfromserver.readObject();
// //ˢ��������Ϣ�б�//
if (isFirstLogin) // ����յ�½
{
intMessageCounter = messobj.chat.size(); // ���θ��û���½ǰ����������
isFirstLogin = false;
}
if (!serverMessage.equals(messobj.serverMessage)) {
serverMessage = messobj.serverMessage;
taUserMessage.append("[ϵͳ��Ϣ]��" + serverMessage+"\n");
}
for (int i = intMessageCounter; i < messobj.chat.size(); i++) {
Chat temp = (Chat) messobj.chat.elementAt(i);
String temp_message;
if (temp.chatUser.equals(strLoginName)) {
if (temp.chatToUser.equals(strLoginName)) {
temp_message = "ϵͳ��ʾ�����벻Ҫ�������" + "\n";
} else {
if (!temp.whisper) // �������Ļ�
{
temp_message = "���㡿�ԡ�" + temp.chatToUser + "��"
+ "˵��" + temp.chatMessage
+ "\n";
} else {
temp_message = "���㡿���Ķԡ�" + temp.chatToUser
+ "��" + "˵��" + temp.chatMessage
+ "\n";
}
}
} else {
if (temp.chatToUser.equals(strLoginName)) {
if (!temp.whisper) // �������Ļ�
{
temp_message = "��" + temp.chatUser + "���ԡ��㡿"
+ "˵��" + temp.chatMessage
+ "\n";
} else {
temp_message = "��" + temp.chatUser + "�����Ķԡ��㡿"
+ "˵��" + temp.chatMessage
+ "\n";
}
} else {
if (!temp.chatUser.equals(temp.chatToUser)) // �Է�û����������
{
if (!temp.whisper) // �������Ļ�
{
temp_message = "��" + temp.chatUser + "���ԡ�"
+ temp.chatToUser + "��"
+ "˵��" + temp.chatMessage + "\n";
} else {
temp_message = "";
}
} else {
temp_message = "";
}
}
}
taUserMessage.append(temp_message);
intMessageCounter++;
}
// //ˢ�������û�//
lstUserList.clear();
for (int i = 0; i < messobj.userOnLine.size(); i++) {
String User = ((Customer) messobj.userOnLine.elementAt(i)).custName;
lstUserList.addItem(User);
}
Integer a = new Integer(messobj.userOnLine.size());
lblCount.setText(a.toString());
// ��ʾ�û����������ҵ���Ϣ
if (messobj.userOnLine.size() > intUserTotal) {
String tempstr = ((Customer) messobj.userOnLine
.elementAt(messobj.userOnLine.size() - 1)).custName;
if (!tempstr.equals(strLoginName)) {
taUserMessage.append("��" + tempstr + "������" + "\n");
}
}
if (messobj.userOnLine.size() < intUserTotal) {
for (int b = 0; b < user_exit.size(); b++) {
isFound = false;
for (int c = 0; c < messobj.userOnLine.size(); c++) {
String tempstr = ((Customer) user_exit.elementAt(b)).custName;
if (tempstr.equals(((Customer) messobj.userOnLine
.elementAt(c)).custName)) {
isFound = true;
break;
}
}
if (!isFound) // û�з��ָ��û�
{
String tempstr = ((Customer) user_exit.elementAt(b)).custName;
if (!tempstr.equals(strLoginName)) {
taUserMessage.append("��" + tempstr + "������"
+ "\n");
}
}
}
}
user_exit = messobj.userOnLine;
intUserTotal = messobj.userOnLine.size();
streamtoserver.close();
streamfromserver.close();
toServer.close();
Thread.sleep(3000);
}
} catch (Exception e) {
@SuppressWarnings("unused")
JOptionPane jop = new JOptionPane();
JOptionPane.showMessageDialog(null, "�������ӷ�������");
e.printStackTrace();
frmChat.dispose();
}
} // run()����
private void exitChatRoom() {
exit();
}
// /������ť��Ӧ//
public void actionPerformed(ActionEvent ae) {
Object source = (Object) ae.getSource();
if (source.equals(btnCls)) {
clearMessage();
}
if (source.equals(btnExit)) {
exit();
}
if (source.equals(btnSend)) {
sendMessage();
}
if (source.equals(btnSave)) {
saveMessage();
}
if (source.equals(lstUserList)) // ˫���б���
{
changeUser();
}
} // actionPerformed()����
// /�������ڹر���Ӧ//
class Windowclose extends WindowAdapter {
public void windowClosing(WindowEvent e) {
exit();
}
}
// "����"��ť
public void clearMessage() {
taUserMessage.setText("");
}
// "�˳�"��ť
public void exit() {
Exit exit = new Exit();
exit.exitname = strLoginName;
// �����˳���Ϣ
try {
Socket toServer = new Socket(strServerIp, 1001);
// �������������Ϣ
ObjectOutputStream outObj = new ObjectOutputStream(toServer
.getOutputStream());
outObj.writeObject(exit);
outObj.close();
toServer.close();
frmChat.dispose();
} catch (Exception e) {
}
} // exit()����
// "����"��ť
public void sendMessage() {
Chat chatobj = new Chat();
chatobj.chatUser = strLoginName;
chatobj.chatMessage = txtMessage.getText();
chatobj.chatToUser = String.valueOf(cmbUser.getSelectedItem());
chatobj.whisper = chPrivateChat.isSelected() ? true : false;
try {
Socket toServer = new Socket(strServerIp, 1001);
ObjectOutputStream outObj = new ObjectOutputStream(toServer
.getOutputStream());
outObj.writeObject(chatobj);
txtMessage.setText(""); // ����ı���
outObj.close();
toServer.close();
} catch (Exception e) {
}
}
// "����"��ť
public void saveMessage() {
try {
FileOutputStream fileoutput = new FileOutputStream(
this.strLoginName + "_message.txt", true);
String temp = taUserMessage.getText();
fileoutput.write(temp.getBytes());
fileoutput.close();
JOptionPane.showMessageDialog(null, "�����¼������" + this.strLoginName
+ "_message.txt");
} catch (Exception e) {
System.out.println(e);
}
}
// ����ѡ�û����ӵ�cmbUser��
public void changeUser() {
boolean key = true;
String selected = lstUserList.getSelectedItem();
for (int i = 0; i < cmbUser.getItemCount(); i++) {
if (selected.equals(cmbUser.getItemAt(i))) {
key = false;
break;
}
}
if (key == true) {
cmbUser.insertItemAt(selected, 0);
}
String head = getUserHead(lstUserList.getSelectedItem());
cmbUser.setSelectedItem(selected);
headLabel.setIcon(new ImageIcon("face//" + head + ".JPG"));
}
protected void freshHead() {
String head = getUserHead(cmbUser.getSelectedItem().toString());
headLabel.setIcon(new ImageIcon("face//" + head + ".JPG"));
}
private String getUserHead(String selectedItem) {
String head = "oo";
for (int i = 0; i < messobj.userOnLine.size(); i++) {
String User = ((Customer) messobj.userOnLine.elementAt(i)).custName;
head = ((Customer) messobj.userOnLine.elementAt(i)).custHead;
if (User.equals(selectedItem)) {
break;
}
}
return head;
}
public static void main(String args[]) {
new ChatRoom("�����û�", "127.0.0.1");
}
}
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