Java聊天：从单用户到多用户。（涉及serversocket和mysql）
我一直在尝试让我现有的聊天类让多个用户都能看到这些消息，但我似乎不知道怎么做Java聊天：从单用户到多用户。（涉及serversocket和mysql）,java,multithreading,swing,sockets,chat,Java,Multithreading,Swing,Sockets,Chat,我一直在尝试让我现有的聊天类让多个用户都能看到这些消息，但我似乎不知道怎么做 public class user { JFrame chatWindow = null; JButton sendButton = null; JTextField message = null; JTextArea chatArea = null; JPanel chatArea_Container = null;
public class user
{
JFrame chatWindow = null;
JButton sendButton = null;
JTextField message = null;
JTextArea chatArea = null;
JPanel chatArea_Container = null;
JPanel sendButton_Container = null;
JScrollPane Scroll = null;
Socket socket = null;
BufferedReader reader = null;
PrintWriter writer = null;
JButton login;
JTextField username;
JTextField password;
JPanel login_Container = null;
public user(){
userGUI();
}
public void userGUI(){
chatWindow= new JFrame ("Client");
username = new JTextField ("");
password = new JTextField ("");
login = new JButton ("login");
sendButton = new JButton ("Send");
message = new JTextField (4);
chatArea = new JTextArea (10,12);
Scroll = new JScrollPane(chatArea);
chatArea_Container = new JPanel();
chatArea_Container.setLayout (new GridLayout (1,1));
chatArea_Container.add(Scroll);
login_Container = new JPanel();
login_Container.setLayout(new GridLayout(1,3));
login_Container.add(username);
login_Container.add(password);
login_Container.add(login);
sendButton_Container = new JPanel();
sendButton_Container.setLayout(new GridLayout(1,2));
sendButton_Container.add(message);
sendButton_Container.add(sendButton);
chatWindow.setLayout(new BorderLayout());
chatWindow.add(chatArea_Container,BorderLayout.CENTER);
chatWindow.add(sendButton_Container,BorderLayout.SOUTH);
chatWindow.add(login_Container,BorderLayout.NORTH);
chatWindow.setSize(600, 350);
chatWindow.setVisible(true);
chatWindow.setResizable(false);
chatWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Thread main = new Thread(new Runnable(){
public void run(){
try{
socket = new Socket ("localhost", 9000);
read();
write();
}
catch(Exception ex){
ex.printStackTrace();
}
}
});
main.start();
}
public void read(){
Thread read_Thread = new Thread (new Runnable(){
public void run(){
try{
reader = new BufferedReader (new InputStreamReader (socket.getInputStream()));
while (true){
String messageReceived = reader.readLine();
chatArea.append("Server says: "+messageReceived+"\n");
}
}catch(Exception ex){
ex.printStackTrace();
}
}
});
read_Thread.start();
}
public void write(){
Thread writeThread = new Thread (new Runnable(){
public void run(){
try{
writer = new PrintWriter(socket.getOutputStream(),true);
sendButton.addActionListener(new ActionListener (){
public void actionPerformed (ActionEvent e){
String sending_message = message.getText();
writer.println(sending_message);
message.setText("");
}
});
}catch (Exception ex){
ex.printStackTrace();
}
}
});
writeThread.start();
}
public static void main(String[] args) {
new user();
}
public void setVisible(boolean b) {
// TODO Auto-generated method stub
}
}
{
JFrame chatWindow = null;
JButton sendButton = null;
JTextField message = null;
JTextArea chatArea = null;
JPanel chatArea_Container = null;
JPanel sendButton_Container = null;
JScrollPane Scroll = null;
ServerSocket server = null;
Socket socket = null;
BufferedReader reader = null;
PrintWriter writer = null;
JButton login;
JTextField username;
JTextField password;
JPanel login_Container = null;
public server(){
serverGUI();
}
public void serverGUI(){
chatWindow= new JFrame ("Server");
username = new JTextField ("");
password = new JTextField ("");
login = new JButton ("login");
login.addActionListener(this);
sendButton = new JButton ("Send");
message = new JTextField (4);
chatArea = new JTextArea (10,12);
Scroll = new JScrollPane(chatArea);
chatArea_Container = new JPanel();
chatArea_Container.setLayout (new GridLayout (1,1));
chatArea_Container.add(Scroll);
login_Container = new JPanel();
login_Container.setLayout(new GridLayout(1,3));
login_Container.add(username);
login_Container.add(password);
login_Container.add(login);
sendButton_Container = new JPanel();
sendButton_Container.setLayout(new GridLayout(1,2));
sendButton_Container.add(message);
sendButton_Container.add(sendButton);
chatWindow.setLayout(new BorderLayout());
chatWindow.add(chatArea_Container,BorderLayout.CENTER);
chatWindow.add(sendButton_Container,BorderLayout.SOUTH);
chatWindow.add(login_Container,BorderLayout.NORTH);
chatWindow.setSize(600, 350);
chatWindow.setVisible(true);
chatWindow.setResizable(false);
chatWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Thread main = new Thread (new Runnable(){
public void run(){
try{
server = new ServerSocket(9000);
while(true){
socket = server.accept();
read();
write();
}
}catch(Exception ex){
ex.printStackTrace();
}
}
});
main.start();
}
public void read(){
Thread read_Thread = new Thread (new Runnable(){
public void run(){
try{
reader = new BufferedReader (new InputStreamReader (socket.getInputStream()));
while (true){
String messageReceived = reader.readLine();
chatArea.append("User says: "+messageReceived+"\n");
}
}catch(Exception ex){
ex.printStackTrace();
}
}
});
read_Thread.start();
}
public void write(){
Thread writeThread = new Thread (new Runnable(){
public void run(){
try{
writer = new PrintWriter(socket.getOutputStream(),true);
sendButton.addActionListener(new ActionListener (){
public void actionPerformed (ActionEvent e){
String sending_message = message.getText();
writer.println(sending_message);
message.setText("");
}
});
}catch (Exception ex){
ex.printStackTrace();
}
}
});
writeThread.start();
}
public static void main(String[] args) {
new server();
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
}
}
我基本上需要修改服务器类，使其没有读写方法，只打开两个用户窗口吗？首先，您违反了Swing的单线程规则，Swing不是线程安全的，您应该只在事件调度线程的上下文中更新UI。有关更多详细信息和可能的解决方案，请参阅。对于您的问题，您的服务器需要跟踪所有活动的客户端连接。每次向服务器发送消息时，服务器都需要将此消息重新广播给所有其他客户端谢谢你的程序员。我还是一个初学者，我需要更多关于重播的信息。你能用一个小的伪代码片段详细描述一下吗？