Java第三次作业第三题

3. 请补充下面的Socket通信程序内容：

（1）Socket通信中的服务端程序：ChatServerSocket.java

package naizi;
import java.io.*;
import java.net.*;
public class ChatServerSocket{
private ChatJFrame chatframe;  //聊天室的图形用户界面
private ServerSocket server;
private Socket client;
public ChatServerSocket(int port, String name)    //约定端口号、网名
{  
try {
server = new ServerSocket(port);
client = server.accept();//等待接收客户端的连接申请   
BufferedReader cin = new BufferedReader(new InputStreamReader(client.getInputStream()));//获得字符输入流

PrintWriter cout = new PrintWriter(client.getOutputStream(), true);//获得字符输出流

chatframe = new ChatJFrame(name," 服务端端口"+port,cout);

String aline = "";

do{

aline = cin.readLine();//从输入流接收数据（读取一行数据）

if (aline!=null  && !aline.equals("bye"))

chatframe.receive(aline);

}while (aline!=null  && !aline.equals("bye"));

chatframe.setWriter(null);

cin.close();

cout.close();

client.close();

server.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//创建服务端Socket对象
}
public static void main(String args[])
{
    new ChatServerSocket(2018,"王奕");               //约定端口号，指定网名
}
}  

（2）Socket通信中的客户端程序：ChatSocket.java

package naizi;
import java.io.*;
import java.net.*;
public class ChatSocket{
private ChatJFrame chatframe;   //聊天室的图形用户界面
private Socket client; 
public ChatSocket(String host, int port, String name) //主机名、端口号、网名
{

try {
client = new Socket(host,port);
BufferedReader cin = new BufferedReader(new InputStreamReader(client.getInputStream()));//获得字符输入流

PrintWriter cout = new PrintWriter(client.getOutputStream(),true);//获得字符输出流

chatframe = new ChatJFrame(name,"客户端主机"+host+" 端口"+port,cout);

String aline = "";

do{

aline = cin.readLine();

if (aline!=null && !aline.equals("bye"))

chatframe.receive(aline);

}while (aline!=null  && !aline.equals("bye"));

chatframe.setWriter(null);

cin.close();

cout.close();

client.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}//创建客户端Socket对象向服务端发出连接请求
}
public static void main(String args[])
{
    new ChatSocket("localhost",2018,"阮磊");         //指定主机和端口号，指定网名
}
}  

（3）聊天框的图形界面程序：ChatJFrame.java

package naizi;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
@SuppressWarnings("serial")
public class ChatJFrame extends JFrame implements ActionListener
{
private JTextArea text_receiver;                       //显示对话内容的文本区
private JTextField text_sender;                        //输入发送内容的文本行
private PrintWriter cout;                              //字符输出流对象
private String name;                                   //网名

public ChatJFrame(String name, String title, PrintWriter cout)  //构造方法
{
    super("聊天室  "+name+"  "+title);
    this.setSize(320,240);
    this.setLocation(300,240);
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    
    this.text_receiver = new JTextArea();
    this.text_receiver.setEditable(false);             //不可编辑
    this.getContentPane().add(this.text_receiver);
    
    JPanel panel = new JPanel();
    this.getContentPane().add(panel,"South");
    this.text_sender = new JTextField(12);
    panel.add(this.text_sender);
    this.text_sender.addActionListener(this);          //注册单击事件监听器
    JButton button_send = new JButton("发送");
    panel.add(button_send);
    button_send.addActionListener(this);
    JButton button_leave = new JButton("离线");
    panel.add(button_leave);
    button_leave.addActionListener(this);
    this.setVisible(true);
    this.setWriter(cout);
    this.name = name;
}

public ChatJFrame()
{
    this("","",null);
}
public void setWriter(PrintWriter cout)                //设置字符输出流对象
{
    this.cout = cout;
}
public void receive(String message)                    //显示对方发来的内容
{
    text_receiver.append(message+"\r\n");
}
    
public void actionPerformed(ActionEvent e)
{
    if (e.getActionCommand()=="离线")
    {
        if (this.cout!=null)
        {
            this.cout.println(name+"离线");
            this.cout.println("bye");
            this.cout = null;
        }
        text_receiver.append("我离线\n");
    }
    else                                               //发送
    {
        if (this.cout!=null)
        {
            this.cout.println(name+" 说："+text_sender.getText());
            text_receiver.append("我说："+text_sender.getText()+"\n");
            text_sender.setText("");
        }
        else
            text_receiver.append("已离线，不能再发送。\n");
    }
}
public static void main(String args[])
{
    new ChatJFrame();
}
}  

程序运行结果如下展示：