这是我自己做的简单聊天系统客户端package LiaoTianSys;import java.awt.*;import javax.swing.*;import java.awt.*;import java.awt.event.*;import java.io.*;import .Socket;import .UnknownHostException;public class ConversationFrame extends JFrame {JScrollPane jsp;JTextField jtf;static JTextArea jta;//JTextArea jat1,jta2;JButton enter=new JButton("发送");JButton jb=new JButton("聊天室好友");JButton jb2=new JButton("进入聊天室");JButton jb3=new JButton("刷新在线人员列表");JPanel jp,jp1,jp3,jp4;DefaultListModel listmodel = new DefaultListModel();//static String[] NAME=new String[10];String n[]={"f"};JList list=new JList(listmodel);JLabel time=new JLabel("当前系统时间:");JLabel showtime=new JLabel("显示时间");JLabel jl=new JLabel("输聊天信息");JLabel nicheng=new JLabel("昵称");JTextField NCshuru=new JTextField(10);static DataOutputStream dos;static DataInputStream dis;//final LoginFrame lf;Socket socket;public ConversationFrame(){Container con=getContentPane();con.setLayout(new BorderLayout());jp=new JPanel();setSize(700,600);setLocation(100,100);jta=new JTextArea();jta.setEditable(false);jsp=new JScrollPane(jta);con.add(jsp,BorderLayout.CENTER);jtf=new JTextField(20);jp.add(jl);jp.add(jtf);jp.add(enter);con.add(jp,BorderLayout.SOUTH);jp1=new JPanel(new BorderLayout());JScrollPane jsp1=new JScrollPane(list);jp1.add(jsp1,BorderLayout.CENTER);jp1.add(jb,BorderLayout.NORTH);con.add(jp1,BorderLayout.EAST);//pack();jp3=new JPanel();jp3.add(nicheng);jp3.add(NCshuru);jp3.add(jb2);con.add(jp3,BorderLayout.NORTH);jp4=new JPanel(new GridLayout(10,1));jp4.add(jb3);jp4.add(time);jp4.add(showtime);new getTime(this).start();con.add(jp4,BorderLayout.WEST);setVisible(true);// 发送信息给所有人enter.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent arg0) {// TODO Auto-generated method stubString info=jtf.getText();try {dos.writeUTF(NCshuru.getText()+" 对所有人说:"+info);dos.flush();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}});//进入聊天室时将自己的昵称发给服务器，首先去验证是否会与已有的人同名，本聊天室是不支持同昵称聊天jb2.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){String msg=NCshuru.getText().toString();//得到昵称if(msg.length()==0){JOptionPane.showMessageDialog(null, "昵称不应该为空,", "温馨提示", RMA TION_MESSAGE);}{try{dos.writeUTF("name"+msg);dos.flush();}catch(Exception ex){System.out.println(ex.getMessage());}}}});//向服务器请求更新在线人员列表jb3.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){try {listmodel.removeAllElements();//请求之前删除JList对象中的所有内容dos.writeUTF("请求更新在线人员列表");dos.flush();} catch (IOException e1) {// TODO Auto-generated catch block//e1.printStackTrace();System.out.println(e1.getMessage());}}});//当有在线人员时，双击JList列表某项弹出私聊对话框事件，匿名内部类实现的list.addMouseListener(new MouseAdapter(){public void mouseClicked(MouseEvent e){if(e.getClickCount()==2){int index=list.locationToIndex(e.getPoint());// 获得list表中的索引值String recevier=(String)listmodel.getElementAt(index);//得到索引对应的值String sender=NCshuru.getText();new Danliao(sender,recevier,socket);}}});}public static void main(String[] args) {ConversationFrame Con=new ConversationFrame();Con.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);Con.kaishi();}public void kaishi(){try {socket=new Socket("172.16.14.60",8888);dos=new DataOutputStream(socket.getOutputStream());dis=new DataInputStream(socket.getInputStream());pc pc1=new pc(socket,this);//传送套接字，本类对象给pc线程pc1.start();} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}// pc线程类，负责接收服务器发送来的信息class pc extends Thread{ ConversationFrame conver;Socket socket;public pc(Socket socket,ConversationFrame conver){this.conver=conver;this.socket=socket;}public void run(){try {int i=0;while(true){String line;//从线路读取信息line=ConversationFrame.dis.readUTF();// 将所有的在线人员昵称发送给JList,并添加到在线人列表中if(line.startsWith("N"))// 服务器发送过来的信息的格式是N+{String na=line.substring(1);try{conver.listmodel.addElement(na);System.out.println(na);}catch(Exception e){System.out.println(e.getMessage());}}//接受服务器发来的广播聊天信息else{ConversationFrame.jta.append(line+"\n");}}} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();System.out.println(e.getMessage());}}}服务器端package LiaoTianSys;import java.io.*;import .*;import java.util.*;public class Server implements Runnable{public static final int port=8888;protected ServerSocket ss;static Vector connections;Thread connect;public Server(){try {ss=new ServerSocket(port);connections=new Vector(1000);connect=new Thread(this);connect.start();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void main(String[] args) {new Server();}public void run(){try{while(true){Socket client=ss.accept();System.out.println("客户端连接上");firstthread f=new firstthread(this,client);f.setPriority(Thread.MIN_PRIORITY);f.start();connections.addElement(f);}}catch(IOException e){System.out.println(e.getMessage());}}//向所有人发送聊天信息public void SenAll(String msg){int i;firstthread ft;for(i=0;i<connections.size();i++){ft=(firstthread)connections.elementAt(i);try{ft.out.writeUTF(msg);}catch(Exception e){System.out.println(e.getMessage());}}}//发送单聊信息的方法public void SenOne(String msg){int i;firstthread ft;/*String s1,s2,s3;s1=new String("people");s2=new String(msg.substring(2));//私信为两个字s3=s1.conString msg="我悄悄的对小花说你好啊";cat(s2);*/int begin=msg.indexOf("对");int end=msg.indexOf("说");begin=begin+1;String strNew=msg.substring(begin,end);for(i=0;i<connections.size();i++)//遍历线程，找到要发送的对象{ft=(firstthread)connections.elementAt(i);//遍历线程if(strNew.startsWith()){System.out.println();try{String MSG=msg.substring(7);ft.out.writeUTF(MSG);}catch(IOException e){System.out.println(e.getMessage());}}}}}class firstthread extends Thread{protected Socket client;String line,name=null;DataOutputStream firstout,out;DataInputStream in;Server server;public firstthread(Server server,Socket socket){this.server=server;this.client=socket;try{in=new DataInputStream(client.getInputStream());out=new DataOutputStream(client.getOutputStream());firstout=new DataOutputStream(client.getOutputStream());}catch(IOException e){server.connections.removeElement(this);}}//客户线程运行的方法，不断监听客户线路发送的来的信息，然后决定转发方式public void run(){try{while(true){line=in.readUTF();if(line.startsWith("name")){//获取当前线程firstthreadd=(firstthread)(server.connections.elementAt(server.connections.indexOf(this)));line=line.substring(4);if(==null){=line;}}//将服务器的所有在线人员的昵称发送给所有的客户端else if(line.startsWith("请求更新在线人员列表")){try{for(int i=0;i<server.connections.size();i++){firstthread c=(firstthread)(server.connections.elementAt(i));if(!=null){firstout.writeUTF("N"+);//发送昵称}}}catch(Exception e){System.out.println(e.getMessage());}}else if(line.startsWith("private")){server.SenOne(line);}//发送聊天信息给所有的pc客户端else{server.SenAll(line);}}}catch(IOException e){System.out.println(e.getMessage());}}}显示时间package LiaoTianSys;import java.text.SimpleDateFormat;import java.util.Date;public class getTime extends Thread{String time;ConversationFrame conver;public getTime(ConversationFrame conver){this.conver=conver;System.out.println("获得系统时间");}public void run(){while(true){SimpleDateFormat df=new SimpleDateFormat("HH:mm:ss");time= df.format(new Date());//System.out.println(time);conver.showtime.setText(time);try{this.sleep(1000);}catch(Exception e){System.out.println(e.getMessage());}}}public static void main(String []args){}}单聊package LiaoTianSys;import java.io.DataOutputStream;import java.io.IOException;import .*;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class Danliao extends JFrame implements ActionListener{ JButton jb=new JButton("发送");JPanel jp1=new JPanel();JLabel jl=new JLabel("输入聊天信息");JTextField jtf=new JTextField(20);JTextArea jta=new JTextArea();JScrollPane jsp=new JScrollPane(jta);String recevier;String sender;Socket socket;public Danliao(String sender,String recevier,Socket socket) { this.recevier=recevier;this.sender=sender;this.socket=socket;setBackground(Color.red);setTitle("与"+recevier+"单聊");setSize(400,400);setLocation(200,200);Container con=getContentPane();con.setLayout(new BorderLayout());con.add(jsp,BorderLayout.CENTER);jp1.add(jl);jp1.add(jtf);jp1.add(jb);/*addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){//System.exit(0);//this.dispose();//this.hide();this.setVisible(false);}});*/addWindowListener(new Close(this));con.add(jp1,BorderLayout.SOUTH);jb.addActionListener(this);setVisible(true);}public void actionPerformed(ActionEvent e){ String msg=jtf.getText();jta.append(msg+"\n"+"\n");jtf.setText(null);try{DataOutputStream dos=new DataOutputStream(socket.getOutputStream());dos.writeUTF("private"+sender+"悄悄的对"+recevier+"说: "+msg);jtf.setText(null);}catch(Exception e1){e1.printStackTrace();}}public static void main(String[] args){}}//单击关闭窗口事件，隐藏单聊窗口class Close extends WindowAdapter{Danliao danliao;public Close(Danliao danliao){this.danliao=danliao;}public void windowClosing(WindowEvent e) {danliao.setVisible(false);}}。