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Java网络编程,通过TCP,Socket实现多对一的局域网聊天室

栏目:php教程时间:2017-02-17 09:47:05

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java网络编程,通过TCP,Socket实现多对1的局域网聊天室

可以实现多个客户端连接服务器服务器接收到信息就会把信息广播到所有的客户端

 

这是服务器真个代码

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import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.Socket;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/*这个类是服务器真个UI*/
public class ServerUI extends JFrame {
    public static void main(String[] args) {
        ServerUI serverUI = new ServerUI();
    }

    public JButton btStart;//启动服务器
    public JButton btSend;//发送信息按钮
    public JTextField tfSend;//需要发送的文本信息
    public JTextArea taShow;//信息展现
    public Server server;//用来监听客户端连接
    static List<Socket> clients;//保存连接到服务器的客户端

    public ServerUI() {
        super("服务器端");
        btStart = new JButton("启动服务");
        btSend = new JButton("发送信息");
        tfSend = new JTextField(10);
        taShow = new JTextArea();

        btStart.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server = new Server(ServerUI.this);
            }
        });
        btSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server.sendMsg(tfSend.getText());
                tfSend.setText("");
            }
        });
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                int a = JOptionPane.showConfirmDialog(null, "肯定关闭吗?", "温馨提示",
                        JOptionPane.YES_NO_OPTION);
                if (a == 1) {
                    server.closeServer();
                    System.exit(0); // 关闭
                }
            }
        });
        JPanel top = new JPanel(new FlowLayout());
        top.add(tfSend);
        top.add(btSend);
        top.add(btStart);
        this.add(top, BorderLayout.SOUTH);
        final JScrollPane sp = new JScrollPane();
        sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        sp.setViewportView(this.taShow);
        this.taShow.setEditable(false);
        this.add(sp, BorderLayout.CENTER);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(400, 300);
        this.setLocation(100, 200);
        this.setVisible(true);
    }
}
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
/*这个类是服务器真个等待客户端连接*/
public class Server extends Thread {
    ServerUI ui;
    ServerSocket ss;
    BufferedReader reader;
    PrintWriter writer;

    public Server(ServerUI ui) {
        this.ui = ui;
        this.start();
    }

    public void run() {
        try {

            ss = new ServerSocket(1228);
            ui.clients=new ArrayList<Socket>();
            println("启动服务器成功:端口1228");
            
            while (true) {
                println("等待客户端");
                Socket client = ss.accept();
                ui.clients.add(client);
                println("连接成功" + client.toString());
                new ListenerClient(ui, client);
            }
        } catch (IOException e) {
            println("启动服务器失败:端口1228");
            println(e.toString());
            e.printStackTrace();
        }

    }

    public synchronized void sendMsg(String msg) {
        try {
            for (int i = 0; i < ui.clients.size(); i++) {
                Socket client = ui.clients.get(i);
                writer = new PrintWriter(client.getOutputStream(), true);
                writer.println(msg);
            }

        } catch (Exception e) {
            println(e.toString());
        }
    }

    public void println(String s) {
        if (s != null) {
            this.ui.taShow.setText(this.ui.taShow.getText() + s + "\n");
            System.out.println(s + "\n");
        }
    }

    public void closeServer() {
        try {
            if (ss != null)
                ss.close();
            if (reader != null)
                reader.close();
            if (writer != null)
                writer.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/*这个类是服务器真个等待客户端发送信息*/
public class ListenerClient extends Thread {
    BufferedReader reader;
    PrintWriter writer;
    ServerUI ui;
    Socket client;
    public ListenerClient(ServerUI ui, Socket client) {
        this.ui = ui;
        this.client=client;
        this.start();
    }
    //为每个客户端创建线程等待接收信息,然后把信息广播出去
    public void run() {
        String msg = "";
        while (true) {
            try {
                reader = new BufferedReader(new InputStreamReader(
                        client.getInputStream()));
                writer = new PrintWriter(client.getOutputStream(), true);
                msg = reader.readLine();
                sendMsg(msg);
                
            } catch (IOException e) {
                println(e.toString());
                // e.printStackTrace();
                break;
            }
            if (msg != null && msg.trim() != "") {
                println(">>" + msg);
            }
        }
    }
    //把信息广播到所有用户
    public synchronized void sendMsg(String msg) {
        try {
            for (int i = 0; i < ui.clients.size(); i++) {
                Socket client = ui.clients.get(i);
                writer = new PrintWriter(client.getOutputStream(), true);
                writer.println(msg);
            }

        } catch (Exception e) {
            println(e.toString());
        }
    }

    

    public void println(String s) {
        if (s != null) {
            this.ui.taShow.setText(this.ui.taShow.getText() + s + "\n");
            System.out.println(s + "\n");
        }
    }
}
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客户端代码

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import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class ClientUI extends JFrame {
    public static void main(String[] args) {
        ClientUI client = new ClientUI();
    }
    public ClientUI() {
        super("客户端");
        btStart = new JButton("启动连接");
        btSend = new JButton("发送信息");
        tfSend = new JTextField(10);
        tfIP = new JTextField(10);
        tfPost = new JTextField(5);
        taShow = new JTextArea();

        btStart.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server = new ClientThread(ClientUI.this);
            }
        });
        btSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server.sendMsg(tfSend.getText());
                tfSend.setText("");
            }
        });
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                int a = JOptionPane.showConfirmDialog(null, "肯定关闭吗?", "温馨提示",
                        JOptionPane.YES_NO_OPTION);
                if (a == 1) {
                    System.exit(0); // 关闭
                }
            }
        });
        JPanel top = new JPanel(new FlowLayout());
        top.add(tfSend);
        top.add(btSend);
        top.add(btStart);
        this.add(top, BorderLayout.SOUTH);
        final JScrollPane sp = new JScrollPane();
        sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        sp.setViewportView(this.taShow);
        this.taShow.setEditable(false);
        this.add(sp, BorderLayout.CENTER);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(400, 300);
        this.setLocation(600, 200);
        this.setVisible(true);
    }

    public     JButton btStart;
    public     JButton btSend;
    public     JTextField tfSend;
    public     JTextField tfIP;
    public     JTextField tfPost;
    
    public     JTextArea taShow;
    public     ClientThread server;
    

}
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class ClientThread extends Thread {
    ClientUI ui;
    Socket client;
    BufferedReader reader;
    PrintWriter writer;

    public ClientThread(ClientUI ui) {
        this.ui = ui;
        try {
            client = new Socket("127.0.0.1", 1228);//这里设置连接服务器真个IP的端口
            println("连接服务器成功:端口1228");
            reader = new BufferedReader(new InputStreamReader(
                    client.getInputStream()));
            writer = new PrintWriter(client.getOutputStream(), true);
            // 如果为 true,则 println、printf 或 format 方法将刷新输出缓冲区
        } catch (IOException e) {
            println("连接服务器失败:端口1228");
            println(e.toString());
            e.printStackTrace();
        }
        this.start();
    }

    public void run() {
        String msg = "";
        while (true) {
            try {
                msg = reader.readLine();
            } catch (IOException e) {
                println("服务器断开连接");

                break;
            }
            if (msg != null && msg.trim() != "") {
                println(">>" + msg);
            }
        }
    }

    public void sendMsg(String msg) {
        try {
            writer.println(msg);
        } catch (Exception e) {
            println(e.toString());
        }
    }

    public void println(String s) {
        if (s != null) {
            this.ui.taShow.setText(this.ui.taShow.getText() + s + "\n");
            System.out.println(s + "\n");
        }
    }
    
}
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学习Java的同学注意了!!! 
学习进程中遇到甚么问题或想获得学习资源的话,欢迎加入Java学习交换群,群号码:183993990  我们1起学Java!

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