局域网服务器发送消息,Java实现简单局域网聊天室
本文實(shí)例為大家分享了Java實(shí)現(xiàn)簡(jiǎn)單局域網(wǎng)聊天室的具體代碼，供大家參考，具體內(nèi)容如下
Java 的Socket編程：
1、TCP協(xié)議是面向連接的、可靠的、有序的、以字節(jié)流的方式發(fā)送數(shù)據(jù)，通過(guò)三次握手方式建立連接，形成傳輸數(shù)據(jù)的通道，在連接中進(jìn)行大量數(shù)據(jù)的傳輸，效率會(huì)稍低
2、Java中基于TCP協(xié)議實(shí)現(xiàn)網(wǎng)絡(luò)通信的類(lèi)
客戶(hù)端的Socket類(lèi)
服務(wù)器端的ServerSocket類(lèi)
3、Socket通信的步驟
① 創(chuàng)建ServerSocket和Socket
② 打開(kāi)連接到Socket的輸入/輸出流
③ 按照協(xié)議對(duì)Socket進(jìn)行讀/寫(xiě)操作
④ 關(guān)閉輸入輸出流、關(guān)閉Socket
4、服務(wù)器端：
① 創(chuàng)建ServerSocket對(duì)象，綁定監(jiān)聽(tīng)端口
② 通過(guò)accept()方法監(jiān)聽(tīng)客戶(hù)端請(qǐng)求
③ 連接建立后，通過(guò)輸入流讀取客戶(hù)端發(fā)送的請(qǐng)求信息
④ 通過(guò)輸出流向客戶(hù)端發(fā)送鄉(xiāng)音信息
⑤ 關(guān)閉相關(guān)資源
5、客戶(hù)端：
① 創(chuàng)建Socket對(duì)象，指明需要連接的服務(wù)器的地址和端口號(hào)
② 連接建立后，通過(guò)輸出流想服務(wù)器端發(fā)送請(qǐng)求信息
③ 通過(guò)輸入流獲取服務(wù)器響應(yīng)的信息
④ 關(guān)閉響應(yīng)資源
實(shí)現(xiàn)的聊天室例子：
實(shí)現(xiàn)的效果是如下：
服務(wù)端代碼：
package socket.server;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
/**
* @author 超
* Create by fengc on 2018/7/25 21:21
*/
public class Server extends Thread{
ServerUI ui;
ServerSocket ss;
BufferedReader reader;
PrintWriter writer;
public Server(ServerUI ui) {
this.ui = ui;
this.start();
}
@Override
public void run() {
try {
ss = new ServerSocket(8081);
ui.clients=new ArrayList<>();
println("啟動(dòng)服務(wù)器成功：端口8081");
while (true) {
println("等待客戶(hù)端鏈接.......................................");
Socket client = ss.accept();
ui.clients.add(client);
println("連接成功，客戶(hù)端請(qǐng)求服務(wù)端的詳細(xì)信息：" + client.toString());
new ListenerClient(ui, client);
}
} catch (IOException e) {
println("啟動(dòng)服務(wù)器失敗：端口8081");
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) {
s = "服務(wù)端打印消息：" + s;
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();
}
}
}
package socket.server;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/**
* @author 超
* Create by fengc on 2018/7/25 21:33
* 這個(gè)類(lèi)是服務(wù)器端的等待客戶(hù)端發(fā)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();
}
//為每一個(gè)客戶(hù)端創(chuàng)建線程等待接收信息，然后把信息廣播出去
@Override
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());
break;
}
if (msg != null && msg.trim() != "") {
println("客戶(hù)端 " + msg);
}
}
}
//把信息廣播到所有用戶(hù)
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");
}
}
}
package socket.server;
import javax.swing.*;
import java.awt.*;
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;
/**
* @author 超
* Create by fengc on 2018/7/25 21:21
*/
public class ServerUI extends JFrame {
public static void main(String[] args) {
new ServerUI();
}
public JButton btStart;//啟動(dòng)服務(wù)器
public JButton btSend;//發(fā)送信息按鈕
public JTextField tfSend;//需要發(fā)送的文本信息
public JTextArea taShow;//信息展示
public Server server;//用來(lái)監(jiān)聽(tīng)客戶(hù)端連接
static List clients;//保存連接到服務(wù)器的客戶(hù)端
public ServerUI() {
super("服務(wù)器端");
btStart = new JButton("啟動(dòng)服務(wù)");
btSend = new JButton("發(fā)送信息");
tfSend = new JTextField(10); //裝在輸入文字
taShow = new JTextArea();
//點(diǎn)擊按鈕，所做的是事情，啟動(dòng)服務(wù)器
btStart.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
server = new Server(ServerUI.this);
}
});
//點(diǎn)擊發(fā)送消息按鈕
btSend.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
server.sendMsg(tfSend.getText());
tfSend.setText("");
}
});
//初始化界面
this.addWindowListener(new WindowAdapter() {
//關(guān)閉按鈕點(diǎn)擊事件
public void windowClosing(WindowEvent e) {
int a = JOptionPane.showConfirmDialog(null, "確定關(guān)閉嗎？", "溫馨提示",
JOptionPane.YES_NO_OPTION);
if (a == 1) {
server.closeServer();
System.exit(0); // 關(guān)閉
}
}
});
//底部啟動(dòng)服務(wù)按鈕與發(fā)送消息按鈕
JPanel top = new JPanel(new FlowLayout());
top.add(tfSend);
top.add(btSend);
top.add(btStart);
this.add(top, BorderLayout.SOUTH);
//中部顯示消息欄 信息展示
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);
}
}
客戶(hù)端代碼：
package socket.clinet;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/**
* @author 超
* Create by fengc on 2018/7/25 21:41
*/
public class Client extends Thread {
ClientUI ui;
Socket client;
BufferedReader reader;
PrintWriter writer;
public Client(ClientUI ui) {
this.ui = ui;
try {
String ip = ui.tfIP.getText(); //得到輸入的ip地址
int port = Integer.parseInt(ui.tfPort.getText()); //得到輸入的端口
client = new Socket(ip, port);//這里設(shè)置連接服務(wù)器端的IP的端口
println("連接服務(wù)器成功，服務(wù)器端口地址：" + port);
reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
writer = new PrintWriter(client.getOutputStream(), true);
String name = ui.tfName.getText();
if (name == null || "".equals(name)) {
name = "匿名者";
}
sendMsg("會(huì)員 " + name + ",登錄上來(lái)了........................");
// 如果為 true，則 println、printf 或 format 方法將刷新輸出緩沖區(qū)
} catch (NumberFormatException nu) {
println("端口請(qǐng)輸入正確.......");
nu.printStackTrace();
} catch (IOException e) {
println("連接服務(wù)器失敗：請(qǐng)輸入正確的IP地址與端口");
println(e.toString());
e.printStackTrace();
}
this.start();
}
public void run() {
String msg = "";
while (true) {
try {
msg = reader.readLine();
} catch (IOException e) {
println("服務(wù)器斷開(kāi)連接");
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");
}
}
}
package socket.clinet;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
/**
* @author 超
* Create by fengc on 2018/7/25 21:40
*/
public class ClientUI extends JFrame {
public static void main(String[] args) {
new ClientUI();
}
public JButton btStart;
public JButton btSend;
public JTextField tfSend; //裝在輸入文字
public JTextPane nameText; //輸入名字
public JTextPane ipTex; //輸入名字
public JTextPane portText; //輸入名字
public JTextField tfName; //服務(wù)器ip
public JTextField tfIP; //服務(wù)器ip
public JTextField tfPort; //服務(wù)器端口
public JTextArea taShow;
public Client server;
public ClientUI() {
super("客戶(hù)端");
btStart = new JButton("啟動(dòng)連接");
btSend = new JButton("發(fā)送信息");
tfSend = new JTextField(20);
tfIP = new JTextField(8);
tfPort = new JTextField(3);
tfName = new JTextField(6);
nameText = new JTextPane();nameText.setText("登錄名");nameText.setEditable(false);
ipTex = new JTextPane();ipTex.setText("服務(wù)地址");ipTex.setEditable(false);
portText = new JTextPane();portText.setText("服務(wù)端口");portText.setEditable(false);
taShow = new JTextArea();
//啟動(dòng)鏈接按鈕事件
btStart.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
server = new Client(ClientUI.this);
}
});
//發(fā)送按鈕事件
btSend.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String name = tfName.getText();
if (name == null || "".equals(name)) {
name = "匿名者";
}
server.sendMsg(name + "：" + tfSend.getText());
tfSend.setText("");
}
});
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
int a = JOptionPane.showConfirmDialog(null, "確定關(guān)閉嗎？", "溫馨提示",
JOptionPane.YES_NO_OPTION);
if (a == 1) {
System.exit(0); // 關(guān)閉
}
}
});
//底部的發(fā)送信息框與鏈接按鈕
JPanel top = new JPanel(new FlowLayout());
top.add(tfSend); //發(fā)送文本
top.add(btSend); //發(fā)送按鈕
this.add(top, BorderLayout.SOUTH); //加載到底部
//頭部放連接服務(wù)的
JPanel northJpannel = new JPanel(new FlowLayout());
northJpannel.add(nameText);
northJpannel.add(tfName);
northJpannel.add(ipTex);
northJpannel.add(tfIP);
northJpannel.add(portText);
northJpannel.add(tfPort);
northJpannel.add(btStart);
this.add(northJpannel,BorderLayout.NORTH); //加載到頭部
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(500, 400);
this.setLocation(600, 200);
this.setVisible(true);
}
}
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