java简易聊天室

package com.One;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.List;

public class ChatServer {
boolean started = false;
ServerSocket ss = null;
List<Client> clients = new ArrayList<Client>();

public static void main(String[] args) throws IOException {
new ChatServer().start();
}

public void start() {
try {
ss = new ServerSocket(8240);
} catch (BindException e) {
System.out.println("端口使用中，请关掉相关资源并重新启动服务器");
} catch (IOException e) {
e.printStackTrace();
}
try {
started = true;
while (started) {
boolean bConnected = false;
Socket s = ss.accept();
Client c = new Client(s);
new Thread(c).start();
clients.add(c);
}
} catch (IOException e) {
System.out.println("Client closed");
} finally {
try {
ss.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}

class Client implements Runnable {
private Socket s;
private DataInputStream dis = null;
private DataOutputStream dos = null;
private boolean bConnected = false;

public Client(Socket s) {
this.s = s;
try {
dos = new DataOutputStream(s.getOutputStream());
dis = new DataInputStream(s.getInputStream());
bConnected = true;
} catch (IOException e) {
e.printStackTrace();
}
}

public void send(String str){
//一开始这里有错误的，已经修正,不写try catch因为解决不了
try{
dos.writeUTF(str);
}catch(IOException e){
clients.remove(this);
System.out.println("对方退出了！我从List里面去掉了");
}
}

@Override
public void run() {
try {
while (bConnected) {
String str = dis.readUTF();
System.out.println(str);
for (int i = 0; i < clients.size(); i++) {
Client c = clients.get(i);
c.send(str);
}
}
}catch(SocketException e){
System.out.println("a client quit!");
}catch (EOFException e) {
System.out.println("退出了,bye");
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (dis != null)
dis.close();
if (dos != null)
dos.close();
if (s != null)
s.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}

package com.One;

import java.awt.BorderLayout;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.net.Socket;
import java.net.SocketException;
import java.net.UnknownHostException;

import javax.swing.JFrame;

public class ChatClient extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1255082554537179096L;
TextField tfTxt = new TextField();
TextArea taContent = new TextArea();
Socket s = null;
DataOutputStream dos;
DataInputStream dis;
private boolean f = false;

Thread rRecv = new Thread(new RecvThread());

public static void main(String[] args) {
new ChatClient().launchFrame();
}

public void launchFrame() {
setLocation(400, 300);
this.setSize(300, 300);
add(tfTxt, BorderLayout.SOUTH);
add(taContent, BorderLayout.NORTH);
pack();
this.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent arg0) {
disconnect();
System.exit(0);
}
});
tfTxt.addActionListener(new TFListener());
setVisible(true);
connect();
rRecv.start();
}

public void disconnect() {
try {
dos.close();
dis.close();
s.close();
} catch (IOException e) {
e.printStackTrace();
}
/*
* try { f = false; rRecv.join();// 等着线程执行完，由于前面f置false,就保证了不会错了 //
* 如果join错了呢?听麻烦的 // join方法 有一个阻塞式方法，不容易停止的 //对付阻塞方法，等待它500ms,然后停止这个方法可以写一下 } catch
* (InterruptedException e) { e.printStackTrace(); } finally { try {
* dos.close(); dis.close(); s.close(); } catch (IOException e) {
* e.printStackTrace(); } }
*/
}

public void connect() {

try {
s = new Socket("127.0.0.1", 8240);
dos = new DataOutputStream(s.getOutputStream());
dis = new DataInputStream(s.getInputStream());
System.out.println("Connected");
f = true;
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

private class TFListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent arg0) {
String str = tfTxt.getText().trim();
// taContent.setText(str);
tfTxt.setText("");
try {
dos.writeUTF(str);
dos.flush();
} catch (IOException e1) {
e1.printStackTrace();
}
}

}

private class RecvThread implements Runnable {

@Override
public void run() {
try {
while (f) {
String s = dis.readUTF();
// readUTF会阻塞
taContent.setText(taContent.getText() + s);
System.out.println(s);
}

} catch (SocketException e) {
System.out.println("退出了，bye!");

} catch(EOFException e){
System.out.println("退出了，Bye");
}catch (IOException e) {
e.printStackTrace();
}
}
}
}