Java练习项目——在线聊天室
话不多说，直接上源码：
server端：
import java.io.*;
import java.net.*;
import java.util.*;
public class ChatServer {
boolean stated = false;
ServerSocket ss = null;
//创建集合，存储子线程
List<Client> clients = new ArrayList<>();
public static void main(String[] args){
new ChatServer().start();
}
public void start() {
try {
ss = new ServerSocket(8888);
stated = true;
}catch (BindException e) {
System.out.println("running ...");
System.exit(0);
}catch (IOException e){
e.printStackTrace();
}
try {
//stated = true;
while (stated) {
Socket s = ss.accept();
Client c = new Client(s);
System.out.println("a client connecied!");
new Thread(c).start();
clients.add(c);
//dis.close();
}
}catch (IOException e){
e.printStackTrace();
//System.out.println("closed!");
}finally {
try {
ss.close();
} catch (IOException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
}
class Client implements Runnable {
private Socket s;
private DataInputStream dis = null;
private boolean bConnected = false;
private DataOutputStream dos = null;
public Client(Socket s) {
this.s = s;
try {
dis = new DataInputStream(s.getInputStream());
dos = new DataOutputStream(s.getOutputStream());
bConnected = true;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void send(String str) {
try {
dos.writeUTF(str);
} catch (IOException e) {
clients.remove(this);
System.out.println("对方退出了，list去除！");
}
}
public void run() {
try {
while(bConnected) {
String str = dis.readUTF();
System.out.println(str);
//将接受的数据发送给客户端
for (int i=0;i<clients.size();i++) {
Client c = clients.get(i);
c.send(str);
}
}
} catch (EOFException e) {
System.out.println("Client closed!");
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(dis != null) dis.close();
if(dos != null) dos.close();
if(s != null) s.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
}
client端：
//导入Java包
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class ChatClient extends Frame{
boolean bConnected = false;
//创建成员变量
DataOutputStream dos = null;
DataInputStream dis = null;
//创建socket成员变量
Socket s = null;
//TextField单行文本框
TextField tfText = new TextField();
// TextArea多行文本框
TextArea taContent = new TextArea();
//成员变量
Thread tRecv = new Thread(new RecvThread());
public static void main(String[] args) {
//创建对象并调用方法
ChatClient q = new ChatClient();
q.launchFrame();
}
//创建窗体方法
public void launchFrame() {
//调整窗口大小
setLocation(400,300);
this.setSize(300,300);
//在窗口的北（上）方，南（下）方添加文本框
add(tfText, BorderLayout.SOUTH);
add(taContent, BorderLayout.NORTH);
//隐藏多余窗口区域
pack();
this.addWindowListener(new WindowAdapter(){
//重写WindowAdapter()类的windowClosing方法
//实现点击关闭终止程序
@Override
public void windowClosing(WindowEvent e) {
disconnect();
System.exit(0);
}
});
//调用Button类中的addActionListener方法
tfText.addActionListener(new TextListener());
setVisible(true);
connect();
tRecv.start();
}
//创建客户端连接服务器方法
public void connect() {
//使用try/catch语句防止错误异常抛出
try {
s = new Socket("127.0.0.1",8888);
dis = new DataInputStream(s.getInputStream());
dos = new DataOutputStream(s.getOutputStream());
System.out.println("connected!");
bConnected = true;
} catch (UnknownHostException e) {
//找不到主机异常
e.printStackTrace();
} catch (IOException e) {
//输入错误，连接错误
//e.printStackTrace();
System.out.println("输入错误，连接失败");
}
}
//添加清理方法，关闭套接字时将内存等清理
public void disconnect() {
try {
dos.close();
dis.close();
s.close();
} catch (IOException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
//创建继承于ActionListener的类
private class TextListener implements ActionListener{
//重写actionPerformed方法
public void actionPerformed(ActionEvent e) {
String str = tfText.getText().trim();
//taContent.setText(str);
tfText.setText("");
try {
dos.writeUTF(str);
dos.flush();
//dos.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
private class RecvThread implements Runnable {
public void run() {
try {
while (bConnected) {
String str = dis.readUTF();
//System.out.println(str);
taContent.setText(taContent.getText() + str + "\n");
}
}catch (SocketException e) {
System.out.println("退出了，bye!");
}catch (IOException e) {
e.printStackTrace();
}
}
}
}
PS：该练习可实现类似在线聊天系统的小功能，本人的第一个的练习，还有很多不足之处，请各位大佬指教。
