Java基于Tcp/ip连接的多人交互聊天室

本文实例为大家分享了Java  Socket编程实现多人交互聊天室的具体代码，供大家参考，具体内容如下

本项目由三个.java文件（Client.java、Server.java、UI.java）和一个.jpg图片文件组成UI.java是负责界面的构成文件。本聊天室的界面极其简单。主要分为两个界面：第一个是启动时需要登陆的界面如下：

输入名字进去以后就可以直接聊天

这个聊天室相当于群聊，每一个登陆进去的人发的信息，其他人都会收到。
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;i<Server.soc.length;i++){
          if((i!=j)&&(Server.soc[i]!=null)){
            DataOutputStream dos = new DataOutputStream((Server.soc[i]).getOutputStream());
            dos.writeUTF(Server.name[Server.j]+"发送于 "+(new Date()));
            dos.writeUTF(con);
          }
        }

      }else{break;}
    }

  }catch(Exception e){
    e.printStackTrace();
  }
  }

}

UI.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);
    }

  } 

}

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