Java基于Tcp/ip连接的多人交互聊天室

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();    }  }}

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();  }  }}

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);    }  } }