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Java實戰(zhàn)之基于TCP實現(xiàn)簡單聊天程序

 更新時間：2022年03月19日 08:47:04   作者：howard2005  
這篇文章主要為大家詳細(xì)介紹了如何在Java中基于TCP實現(xiàn)簡單聊天程序，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價值，感興趣的小伙伴們可以參考一下

一、如何實現(xiàn)TCP通信

要實現(xiàn)TCP通信需要創(chuàng)建一個服務(wù)器端程序和一個客戶端程序，為了保證數(shù)據(jù)傳輸?shù)陌踩裕紫刃枰獙崿F(xiàn)服務(wù)器端程序，然后在編寫客戶端程序。

在本機(jī)運行服務(wù)器端程序，在遠(yuǎn)程機(jī)運行客戶端程序

本機(jī)的IP地址：192.168.129.222

遠(yuǎn)程機(jī)的IP地址：192.168.214.213

二、編寫C/S架構(gòu)聊天程序

1.編寫服務(wù)器端程序 - Server.java

在net.hw.network包里創(chuàng)建Server類

package net.hw.network;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * 功能：服務(wù)器端
 * 作者：華衛(wèi)
 * 日期：2022年03月18日
 */
public class Server extends JFrame {
    static final int PORT = 8136;
    static final String HOST_IP = "192.168.129.222";

    private JPanel panel1, panel2;
    private JTextArea txtContent, txtInput, txtInputIP;
    private JScrollPane panContent, panInput;
    private JButton btnClose, btnSend;

    private ServerSocket serverSocket;
    private Socket socket;
    private DataInputStream netIn;
    private DataOutputStream netOut;

    public static void main(String[] args) {
        new Server();
    }

    public Server() {
        super("服務(wù)器");

        //創(chuàng)建組件
        panel1 = new JPanel();
        panel2 = new JPanel();
        txtContent = new JTextArea(15, 60);
        txtInput = new JTextArea(3, 60);
        panContent = new JScrollPane(txtContent, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        panInput = new JScrollPane(txtInput, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        btnClose = new JButton("關(guān)閉");
        btnSend = new JButton("發(fā)送");

        //添加組件
        getContentPane().add(panContent, "Center");
        getContentPane().add(panel1, "South");
        panel1.setLayout(new GridLayout(0, 1));
        panel1.add(panInput);
        panel1.add(panel2);
        panel2.add(btnSend);
        panel2.add(btnClose);

        //設(shè)置組件屬性
        txtContent.setEditable(false);
        txtContent.setFont(new Font("宋體", Font.PLAIN, 13));
        txtInput.setFont(new Font("宋體", Font.PLAIN, 15));
        txtContent.setLineWrap(true);
        txtInput.setLineWrap(true);
        txtInput.requestFocus();
        setSize(450, 350);
        setLocation(50, 200);
        setResizable(false);
        setVisible(true);

        //等候客戶請求	
        try {
            txtContent.append("服務(wù)器已啟動...\n");
            serverSocket = new ServerSocket(PORT);
            txtContent.append("等待客戶請求...\n");
            socket = serverSocket.accept();
            txtContent.append("連接一個客戶。\n" + socket + "\n");
            netIn = new DataInputStream(socket.getInputStream());
            netOut = new DataOutputStream(socket.getOutputStream());
        } catch (IOException e1) {
            e1.printStackTrace();
        }

        /

        //注冊監(jiān)聽器，編寫事件代碼	
        txtContent.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                displayClientMsg();
            }
        });

        txtInput.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                displayClientMsg();
            }
        });

        panel2.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                displayClientMsg();
            }
        });

        txtInput.addKeyListener(new KeyAdapter() {
            public void keyTyped(KeyEvent e) {
                displayClientMsg();
            }
        });

        txtInput.addFocusListener(new FocusAdapter() {
            public void focusGained(FocusEvent e) {
                displayClientMsg();
            }
        });

        btnSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {

                    String serverMsg = txtInput.getText();
                    if (!serverMsg.trim().equals("")) {
                        txtContent.append("服務(wù)器>" + serverMsg + "\n");
                        netOut.writeUTF(serverMsg);
                    } else {
                        JOptionPane.showMessageDialog(null, "不能發(fā)送空信息！", "服務(wù)器", JOptionPane.WARNING_MESSAGE);
                    }

                    txtInput.setText("");
                    txtInput.requestFocus();
                } catch (IOException ie) {
                    ie.printStackTrace();
                }
            }
        });

        btnClose.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                try {
                    netIn.close();
                    netOut.close();
                    socket.close();
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                System.exit(0);
            }
        });

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                try {
                    netIn.close();
                    netOut.close();
                    socket.close();
                    serverSocket.close();
                } catch (IOException ie) {
                    ie.printStackTrace();
                }
                System.exit(0);
            }

            public void windowActivated(WindowEvent e) {
                txtInput.requestFocus();
            }
        });
    }

    //顯示客戶端信息
    void displayClientMsg() {
        try {
            if (netIn.available() > 0) {
                String clientMsg = netIn.readUTF();
                txtContent.append("客戶端>" + clientMsg + "\n");
            }
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }
}

2.編寫客戶端程序 - Client.java

在net.hw.network包里創(chuàng)建Client類

package net.hw.network;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetAddress;
import java.net.Socket;

/**
 * 功能：客戶端
 * 作者：華衛(wèi)
 * 日期：2022年03月18日
 */
public class Client extends JFrame {

    private JPanel panel1, panel2;
    private JTextArea txtContent, txtInput;
    private JScrollPane panContent, panInput;
    private JButton btnClose, btnSend;

    private Socket socket;
    private DataInputStream netIn;
    private DataOutputStream netOut;

    public static void main(String[] args) {
        new Client();
    }

    public Client() {
        super("客戶端");

        //創(chuàng)建組件
        panel1 = new JPanel();
        panel2 = new JPanel();
        txtContent = new JTextArea(15, 60);
        txtInput = new JTextArea(3, 60);
        panContent = new JScrollPane(txtContent, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        panInput = new JScrollPane(txtInput, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED, ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        btnClose = new JButton("關(guān)閉");
        btnSend = new JButton("發(fā)送");

        //添加組件
        getContentPane().add(panContent, "Center");
        getContentPane().add(panel1, "South");
        panel1.setLayout(new GridLayout(0, 1));
        panel1.add(panInput);
        panel1.add(panel2);
        panel2.add(btnSend);
        panel2.add(btnClose);

        //設(shè)置組件屬性
        txtContent.setEditable(false);
        txtContent.setFont(new Font("宋體", Font.PLAIN, 13));
        txtInput.setFont(new Font("宋體", Font.PLAIN, 15));
        txtContent.setLineWrap(true);
        txtInput.setLineWrap(true);
        txtInput.requestFocus();
        setSize(450, 350);
        setLocation(550, 200);
        setResizable(false);
        setVisible(true);

        //連接服務(wù)器
        try {
            txtContent.append("連接服務(wù)器...\n");
            socket = new Socket(Server.HOST_IP, Server.PORT);
            txtContent.append("連接服務(wù)器成功。\n" + socket + "\n");
            netIn = new DataInputStream(socket.getInputStream());
            netOut = new DataOutputStream(socket.getOutputStream());
        } catch (IOException e1) {
            JOptionPane.showMessageDialog(null, "服務(wù)器連接失??！\n請先啟動服務(wù)器程序！", "客戶端", JOptionPane.ERROR_MESSAGE);
            System.exit(1);
        }

        /

        //注冊監(jiān)聽器，編寫事件代碼
        txtContent.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                displayServerMsg();
            }
        });

        txtInput.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                displayServerMsg();
            }
        });

        panel2.addMouseMotionListener(new MouseMotionAdapter() {
            public void mouseMoved(MouseEvent e) {
                displayServerMsg();
            }
        });

        txtInput.addKeyListener(new KeyAdapter() {
            public void keyTyped(KeyEvent e) {
                displayServerMsg();
            }
        });

        txtInput.addFocusListener(new FocusAdapter() {
            public void focusGained(FocusEvent e) {
                displayServerMsg();
            }
        });

        btnSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {

                    String clientMsg = txtInput.getText();
                    if (!clientMsg.trim().equals("")) {
                        netOut.writeUTF(clientMsg);
                        txtContent.append("客戶端>" + clientMsg + "\n");
                    } else {
                        JOptionPane.showMessageDialog(null, "不能發(fā)送空信息！", "客戶端", JOptionPane.WARNING_MESSAGE);
                    }

                    txtInput.setText("");
                    txtInput.requestFocus();
                } catch (IOException ie) {
                    ie.printStackTrace();
                }
            }
        });

        btnClose.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                try {
                    netIn.close();
                    netOut.close();
                    socket.close();
                } catch (IOException ie) {
                    ie.printStackTrace();
                }
                System.exit(0);
            }
        });

        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                try {
                    netIn.close();
                    netOut.close();
                    socket.close();
                } catch (IOException ie) {
                    ie.printStackTrace();
                }
                System.exit(0);
            }

            public void windowActivated(WindowEvent e) {
                txtInput.requestFocus();
            }
        });
    }

    //顯示服務(wù)端信息
    void displayServerMsg() {
        try {
            if (netIn.available() > 0) {
                String serverMsg = netIn.readUTF();
                txtContent.append("服務(wù)器>" + serverMsg + "\n");
            }
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }
}

3.測試服務(wù)器端與客戶端能否通信

在本機(jī)[192.168.129.222]上啟動服務(wù)器端

在遠(yuǎn)程機(jī)[192.168.214.213]上啟動客戶端

顯示連接服務(wù)器[192.168.129.222]成功，切換到服務(wù)器端查看,顯示連接了一個客戶[192.168.214.213]

此時，服務(wù)器端和客戶端就可以相互通信了

4.程序優(yōu)化思路 - 服務(wù)器端采用多線程

其實，很多服務(wù)器端程序都是允許被多個應(yīng)用程序訪問的，例如門戶網(wǎng)站可以被多個用戶同時訪問，因此服務(wù)器端都是多線程的。

以上就是Java實戰(zhàn)之基于TCP實現(xiàn)簡單聊天程序的詳細(xì)內(nèi)容，更多關(guān)于Java TCP聊天程序的資料請關(guān)注腳本之家其它相關(guān)文章！

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