Java中利用Tcp/ip连接多人交互聊天室的实现，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
使用指南：
1.运行Server.java文件，保证服务端的开启
2.运行UI.java文件，界面登陆。每运行一个UI文件并登陆进去，就代表一个客户进了群聊中，可进行对话。
程序简单易懂，非常适合初学者练习网络编程的知识。
Client.java
import java.net.*;
import java.io.*;
import java.util.*;
public class Client{
String name;
Socket s;
UI ui;
//构造方法 ，把UI对象传过来
public Client(UI ui){
this.ui = ui;
}
//从登陆界面获得名字并传去服务端
public void getName(String name){
try{
s = new Socket("127.0.0.1",3000);
Cli1 d = new Cli1(s,ui);
d.start();
this.name = name;
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(name);
}catch(Exception e){
e.printStackTrace();
}
}
//从聊天界面获得要发送的内容并经服务器转发给各个客户端
public void say(String content){
try{
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(content);
}catch(Exception e){
e.printStackTrace();
}
}
}
//输入和输出
class Cli1 extends Thread {
UI ui;
Socket s ;
public Cli1(Socket s,UI ui){
this.s = s;
this.ui=ui;
}
public void run(){
try{
while(true){
DataInputStream dis = new DataInputStream(s.getInputStream());
String content = dis.readUTF();
if(!content.equals("")&&content!=null){
System.out.println(content);
ui.say(content);
}
}
}catch(Exception e){
e.printStackTrace();
}
}
}Server.java
import java.net.*;
import java.io.*;
import java.util.*;
public class Server{
static Socket s;
static Socket[] soc;
static String[] name;
static int k = 5,i =0,j;
public static void main(String[] args){
Server ser = new Server();
try{
ServerSocket ss = new ServerSocket(3000);
soc = new Socket[k];
name = new String[k];
while(true){
s = ss.accept();
soc[i]= s;
j=i;
i++;
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
DataInputStream dis = new DataInputStream(s.getInputStream());
name[j] = dis.readUTF();
System.out.println(name[j]+"已进入群聊！");
dos.writeUTF("欢迎你，"+name[j]);
new Ser1().start();
}
}catch(ConnectException e){
System.out.println("连接异常！！");
}catch(IOException e){
e.printStackTrace();
}
}
}
class Ser1 extends Thread{
public int j;
public void run(){
try{
DataInputStream read = new DataInputStream((Server.soc[Server.j]).getInputStream());
j=Server.j;
while(true){
String con = read.readUTF();
if(con!=null){
System.out.println("该线程j为"+j);
for(int i = 0;iUI.java
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class UI{
//主方法
public static void main(String[] args){
UI ui = new UI();
ui.cli = new Client(ui);
ui.initFrame();
ui.showLogin();
}
Ser1 ser1 = new Ser1();
//初始化业务对象
public Client cli = null;
public void initCli(){
}
//初始化主窗口
public int width = 720;
public int height = 550;
public JFrame jFrame = null; //界面窗口
public JLayeredPane layeredPane = null; //层叠容器
public JPanel backLayer = null; //背景层
public JPanel frontLayer = null; //前景层
public CardLayout cardLayout = null; //前景层布局器
public void initFrame(){
jFrame = new JFrame("老友聚乐部");
layeredPane = new JLayeredPane();
layeredPane.setPreferredSize(new Dimension(width, height));
jFrame.add(layeredPane);
jFrame.setResizable(false);
jFrame.pack();
jFrame.setVisible(true);
jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
backLayer = new JPanel();
((FlowLayout)backLayer.getLayout()).setHgap(0);
((FlowLayout)backLayer.getLayout()).setVgap(0);
backLayer.setSize(width,height);
backLayer.setLocation(0,0);
JLabel bg = new JLabel(new ImageIcon("12.jpg"));
backLayer.add(bg);
layeredPane.add(backLayer,new Integer(0));
frontLayer = new JPanel();
cardLayout = new CardLayout(0,0);
frontLayer.setLayout(cardLayout);
frontLayer.setOpaque(false);
frontLayer.setSize(width,height);
frontLayer.setLocation(0,0);
layeredPane.add(frontLayer,new Integer(1));
}
//登录界面
public JPanel loginPane = null;
public JTextField loginCodeInput = null;
public JLabel loginTipsLabel = null;
public void showLogin(){
if(loginPane == null){
loginPane = new JPanel();
loginPane.setOpaque(false);
Box loginBox = Box.createVerticalBox();
loginBox.add(Box.createVerticalStrut(180));
JPanel welcome_panel = new JPanel();
welcome_panel.setOpaque(false);
JLabel welcome_label = new JLabel("老友俱乐部");
welcome_label.setForeground(Color.WHITE);
welcome_label.setFont(new Font("微软雅黑",Font.PLAIN,30));
welcome_panel.add(welcome_label);
loginBox.add(welcome_panel);
loginBox.add(Box.createVerticalStrut(50));
JPanel code_panel = new JPanel();
code_panel.setOpaque(false);
JLabel code_label = new JLabel("姓名：");
code_label.setForeground(Color.WHITE);
code_label.setFont(new Font("微软雅黑",Font.PLAIN,25));
code_panel.add(code_label);
loginCodeInput = new JTextField(10);
loginCodeInput.setFont(new Font("微软雅黑", Font.PLAIN,25));
code_panel.add(loginCodeInput);
loginBox.add(code_panel);
loginBox.add(Box.createVerticalStrut(30));
JPanel btn_panel = new JPanel();
btn_panel.setOpaque(false);
JButton login_btn = new JButton("登 录");
login_btn.setFont(new Font("微软雅黑",Font.PLAIN,15));
btn_panel.add(login_btn);
JButton reset_btn = new JButton("重 置");
reset_btn.setFont(new Font("微软雅黑",Font.PLAIN,15));
btn_panel.add(reset_btn);
loginBox.add(btn_panel);
loginBox.add(Box.createVerticalStrut(10));
JPanel tips_panel = new JPanel();
tips_panel.setOpaque(false);
loginTipsLabel = new JLabel("");
loginTipsLabel.setForeground(new Color(238,32,32));
loginTipsLabel.setFont(new Font("微软雅黑",Font.PLAIN,20));
tips_panel.add(loginTipsLabel);
loginBox.add(tips_panel);
loginPane.add(loginBox);
frontLayer.add("loginPane",loginPane);
cardLayout.show(frontLayer,"loginPane");
frontLayer.validate();
loginCodeInput.requestFocus();
reset_btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
loginCodeInput.setText("");
loginTipsLabel.setText("");
loginCodeInput.requestFocus();
}
});
login_btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
String code_str = loginCodeInput.getText();
if("".equals(code_str)){
loginTipsLabel.setText("姓名不能为空！");
loginCodeInput.requestFocus();
}else{
cli.getName(code_str);
showTalk();
}
}
});
}else{
cardLayout.show(frontLayer,"loginPane");
loginCodeInput.setText("");
loginTipsLabel.setText("");
loginCodeInput.requestFocus();
}
}
//聊天主界面
public JPanel menuPane = null;
public JTextArea input = null;
public JTextArea talk = new JTextArea(25,70);
public void showTalk(){
menuPane = new JPanel();
menuPane.setOpaque(false);
menuPane.setLayout(new BorderLayout());
JPanel up = new JPanel();
Box tipsBox = Box.createVerticalBox();
menuPane.add(up,BorderLayout.NORTH); //北边顶上
up.add(tipsBox);
JLabel tips_label = new JLabel("在线朋友");
tips_label.setForeground(Color.WHITE);
tips_label.setFont(new Font("微软雅黑",Font.PLAIN,20));
tips_label.setAlignmentX(Component.LEFT_ALIGNMENT);
tipsBox.add(tips_label);
tipsBox.add(Box.createVerticalStrut(10));
JLabel upTxt = new JLabel(""); //接收在线朋友(需完善)
tipsBox.add(upTxt);
JPanel talk_panel = new JPanel();//中间聊天对话框
talk_panel.setOpaque(false);
menuPane.add(talk_panel,BorderLayout.WEST);
JScrollPane sp = new JScrollPane(talk);
talk_panel.add(talk);
Box inputBox = Box.createHorizontalBox(); //下边输入框
menuPane.add(inputBox,BorderLayout.SOUTH);
JPanel input_panel = new JPanel();
input_panel.setOpaque(false); //放置输入框
input = new JTextArea(4,30);
input.setFont(new Font("微软雅黑",Font.PLAIN,20));
input.setAlignmentX(Component.LEFT_ALIGNMENT);
input_panel.add(input);
inputBox.add(input_panel);
inputBox.add(Box.createHorizontalStrut(0));
JButton send_btn = new JButton("发送");
send_btn.setFont(new Font("微软雅黑",Font.PLAIN,15));
inputBox.add(send_btn);
frontLayer.add("menuPane",menuPane);
cardLayout.show(frontLayer,"menuPane");
frontLayer.validate();
send_btn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){
String append = talk.getText();
String content = input.getText();
talk.setText(append+'\n'+content);
input.setText("");
cli.say(content);
}
});
}
public void say(String content){
if(talk!=null){
String append = talk.getText();
talk.setText(append+'\n'+content);
}
}
}关于Java中利用Tcp/ip连接多人交互聊天室的实现问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注创新互联行业资讯频道了解更多相关知识。
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