Java作业实践（二）制作一个简单的聊天软件
课题：一个简单的聊天软件
一、课设要求
设计一个图形用户界面程序，先设置好本地地址（包括IP地址和端口号），打开程序窗口后，输入目标地址（包括IP地址和端口号）和要发送的信息之后，点击发送按钮可以向目标地址发送信息；并且程序可以接收发送到本地地址的信息并显示在程序窗口中。
- 课设内容分析——总体设计部分
- 各个类的功能说明
ChatWindow.java 主类，负责创建聊天软件登录界面以及聊天窗体界面
SendThread.java 实现数据的发送的，当按键按下时，会调用sendMessage方法
ReceiveThread.java 维护一个阻塞线程，来对端口进行监听，接受收到的信息，每当收到信息时，都会显示
- 各个类的成员变量
（1）ChatWindow类成员变量
聊天窗体组件
sendButton 发送按钮
cancelButton 取消按钮
receiveButton 开始接收数据按钮
receiveText 聊天记录
sendText 消息内容
localPort 发送方端口号
remoteAddress 接收方IP
remotePort 接收方端口号
sendThread 发送方
ReceiveThread 接收方
登陆界面组件
Jbl1 QQ图片
Jp2_jbl1 IP地址
Jp2_jbl2 端口号
Jp2_jbl3 空格（增加间距）
Jp2_jb1 登录按钮
- SendThread类成员变量
chatWindow 聊天主类对象
remoteIP 发送方IP地址
port 发送方端口
message 发送消息
- ReceiveThread类成员变量
server 服务对象
window 聊天窗体对象
- 各个类的方法
（1）ChatWindow类方法
denglu() 负责创建登陆界面
GUIini() 负责创建聊天界面
Actionini() 负责监听
Threadini() 负责线程控制
- SendThread类方法
senMessage() 负责记录发送方IP，端口号，信息
notRun() 负责将数据写入到流中
- ReceiveThread类方法
run() 负责和发送方建立联系
ReceiveThread() 负责确认发送方是否匹配
四、 课设成果
- 登陆界面
2.聊天界面
发送与接收方聊天
五丶附录
代码如下：
ChatWindow
package liaotian;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import java.util.*;
public class ChatWindow extends JFrame implements ActionListener{
private JButton sendButton;
private JButton cancelButton;
private JButton receiveButton;
private JTextArea receiveText;
private JTextField sendText;
private JTextField localPort;
private JTextField remoteAddress;
private JTextField remotePort;
private SendThread sendThread;
private ReceiveThread receiveThread;
private JLabel jbl1;
private JPanel jp2;
private JLabel jp2_jbl1,jp2_jbl2,jp2_jbl3;
private JButton jp2_jb1;
public void denglu() {
jbl1=new JLabel(new ImageIcon("image/图片1.gif"));
this.setSize(350, 150);
this.add(jbl1, "North");
jp2=new JPanel(new GridLayout(2,2));
jp2_jbl1=new JLabel("IP地址",JLabel.CENTER);
jp2_jbl2=new JLabel("端口号(1-65535)",JLabel.CENTER);
jp2_jbl3=new JLabel(" ");
jp2_jb1=new JButton("登录");
jp2_jb1.addActionListener(this);
jp2.add(jp2_jbl1);
try {
jp2.add(new JTextField(InetAddress.getLocalHost().getHostAddress()));
} catch (UnknownHostException e) {
jp2.add(new JTextField("当前机器的IP地址是:" + "Unknown"));
}
jp2.add(jp2_jbl3);
jp2.add(jp2_jbl2);
jp2.add(localPort = new JTextField(""+0));
jp2.add(jp2_jb1);
this.add(jp2,"Center");
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}
public void actionPerformed(ActionEvent arg0 ) {
if(arg0.getSource()==jp2_jb1)
{
jbl1.setVisible(false);
jp2.setVisible(false);
GUIini();
ActionIni();
ThreadIni();
}
}
private void GUIini(){
Container c = this.getContentPane();
c.setLayout(new BorderLayout());
setSize(400, 500);
JPanel panel1 = new JPanel(new GridLayout(4, 2));
panel1.setSize(400, 75);
panel1.add(new JLabel("发送方IP:"));
try {
panel1.add(new JLabel(InetAddress.getLocalHost().getHostAddress()));
} catch (UnknownHostException e) {
panel1.add(new JLabel("发送方IP:" + "Unknown"));
}
panel1.add(new JLabel("发送方端口:"));
panel1.add(new JLabel(localPort.getText()));
panel1.add(new JLabel("接收方IP:"));
remoteAddress = new JTextField();
remoteAddress.setColumns(0);
panel1.add(remoteAddress);
panel1.add(new JLabel("接收方端口:"));
remotePort = new JTextField();
remotePort.setColumns(0);
panel1.add(remotePort);
c.add(panel1,BorderLayout.NORTH)；
JPanel panel2 = new JPanel(new FlowLayout(FlowLayout.LEADING));
panel2.setSize(400,200);
panel2.add(new JLabel("聊天记录："));
receiveText = new JTextArea(15,30);
receiveText.setEditable(false);
receiveText.setAutoscrolls(true);
JScrollPane jsp = new JScrollPane(receiveText);
panel2.add(jsp);
panel2.add(new JLabel("信息内容："));
sendText = new JTextField(30);
sendText.setAutoscrolls(true);
panel2.add(sendText);
c.add(panel2,BorderLayout.CENTER);
JPanel panel4 = new JPanel(new GridLayout(1, 0));
panel4.setSize(400,20);
receiveButton = new JButton("开始接受数据");
sendButton = new JButton("发送");
cancelButton = new JButton("清除");
panel4.add(receiveButton);
panel4.add(cancelButton);
panel4.add(sendButton);
c.add(panel4,BorderLayout.SOUTH);
setVisible(true);
setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
private void ActionIni() {
this.addKeyListener(new KeyListener() {
public void keyTyped(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_ENTER){
sendThread.senMessage(remoteAddress.getText(), Integer.parseInt(remotePort.getText()), sendText.getText());
receiveText.setText(receiveText.getText() + "\n" + "发送:" + sendText.getText());
}
}
public void keyPressed(KeyEvent e) {
}
});
cancelButton.addMouseListener(new MouseListener() {
public void mouseReleased(MouseEvent e) {
sendText.setText("");
}
public void mousePressed(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
});
sendButton.addMouseListener(new MouseListener() {
public void mouseReleased(MouseEvent e) {
sendThread.senMessage(remoteAddress.getText(), Integer.parseInt(remotePort.getText()), sendText.getText());
receiveText.setText(receiveText.getText() + "发送:" + sendText.getText()+ "\n");
}
public void mousePressed(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
});
}
private void ThreadIni() {
sendThread = new SendThread(0, this);
receiveThread = new ReceiveThread(this, Integer.parseInt(localPort.getText()));
}
public ChatWindow() {
denglu();
}
public void printError(String err){
System.out.println("Error occur:" + err);
}
public void setReceive(String receive){
receiveText.setText(receiveText.getText() + "收到:" + receive+ "\n" );
}
public void setLocalPort(int localPortText){
localPort.setText(""+localPortText);
}
public static void main(String[] args) {
new ChatWindow();
}
}
ReceiveThread
package liaotian;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import java.util.*;
public class ReceiveThread extends Thread {
private ServerSocket server;
private ChatWindow window;
public ReceiveThread(ChatWindow window,int Port) {
this.window = window;
try {
server = new ServerSocket(Port)；
start();
} catch (IOException e) {
window.printError("连接出错");
}
}
public void run() {
while(true){
Socket socket;
try {
socket = server.accept();
InputStreamReader reader = new InputStreamReader(socket.getInputStream());
int c;
StringBuilder sb = new StringBuilder();
while((c = reader.read()) != -1){
sb.append((char)c);
}
window.setReceive(sb.toString());
} catch (IOException e) {
System.out.println("线程将接受到的数据写入对话框出错");
}
}
}
}
SendThread
package liaotian;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
import java.util.*;
public class SendThread {
ChatWindow chatWindow;
private String remoteIP = "";
private int port = 0;
private String message = "";
public SendThread(int port,ChatWindow window) {
chatWindow = window;
}
public void notRun() {
InetSocketAddress isa = new InetSocketAddress(remoteIP, port);
try {
Socket socket = new Socket();
socket.connect(isa);
OutputStreamWriter writer = new OutputStreamWriter(socket.getOutputStream());
writer.write(message);
writer.flush();
writer.close();
System.out.println("将数据写入到流中");
} catch (IOException e) {
e.printStackTrace();
}finally{
message = "";
}
}
public void senMessage(String host,int port,String message){
remoteIP = host;
this.port = port;
this.message = message;
notRun();
}
}