Java GUI编程实现在线聊天室

引言

综合应用Java的GUI编程和网络编程，实现一个能够支持多组用户同时使用的聊天室软件。该聊天室具有比较友好的GUI界面，并使用C/S模式，支持多个用户同时使用，用户可以自己选择加入或者创建房间，和房间内的其他用户互发信息（文字和图片）

主要功能

客户端的功能主要包括如下的功能：

• 选择连上服务端
• 显示当前房间列表（包括房间号和房间名称）
• 选择房间进入
• 多个用户在线群聊
• 可以发送表情（用本地的，实际上发送只发送表情的代码）
• 退出房间
• 选择创建房间
• 房间里没人（房主退出），导致房间解散
• 显示系统提示消息
• 显示用户消息
• 构造标准的消息结构发送
• 维护GUI所需的数据模型
  

服务端的功能主要包括：

• 维护用户信息和房间信息
• 处理用户发送来的消息选择转发或者回复处理结果
• 构造标准的消息结构发送
  

架构

整个程序采用C/S设计架构，分为一个服务端和多个客户端。服务端开放一个端口给所有开客户端，客户端连接该端口并收发信息，服务端在内部维护客户端的组，并对每一个客户端都用一个子线程来收发信息

基本类的设计

User类

package User;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
/**
*
* @author lannooo
*
*/
public class User {
private String name;
private long id;
private long roomId;
private Socket socket;
private BufferedReader br;
private PrintWriter pw;
/**
*
* @param name: 设置user的姓名
* @param id：设置user的id
* @param socket:保存用户连接的socket
* @throws IOException
*/
public User(String name, long id, final Socket socket) throws IOException {
this.name=name;
this.id=id;
this.socket=socket;
this.br=new BufferedReader(new InputStreamReader(
socket.getInputStream()));
this.pw=new PrintWriter(socket.getOutputStream());
}
/**
* 获得该用户的id
* @return id
*/
public long getId() {
return id;
}
/**
* 设置该用户的id
* @param id 新的id
*/
public void setId(long id) {
this.id = id;
}
/**
* 获得用户当前所在的房间号
* @return roomId
*/
public long getRoomId() {
return roomId;
}
/**
* 设置当前用户的所在的房间号
* @param roomId
*/
public void setRoomId(long roomId) {
this.roomId = roomId;
}
/**
* 设置当前用户在聊天室中的昵称
* @param name
*/
public void setName(String name) {
this.name = name;
}
/**
* 返回当前用户在房间中的昵称
* @return
*/
public String getName() {
return name;
}
/**
* 返回当前用户连接的socket实例
* @return
*/
public Socket getSocket() {
return socket;
}
/**
* 设置当前用户连接的socket
* @param socket
*/
public void setSocket(Socket socket) {
this.socket = socket;
}
/**
* 获得该用户的消息读取辅助类BufferedReader实例
* @return
*/
public BufferedReader getBr() {
return br;
}
/**
* 设置 用户的消息读取辅助类
* @param br
*/
public void setBr(BufferedReader br) {
this.br = br;
}
/**
* 获得消息写入类实例
* @return
*/
public PrintWriter getPw() {
return pw;
}
/**
* 设置消息写入类实例
* @param pw
*/
public void setPw(PrintWriter pw) {
this.pw = pw;
}
/**
* 重写了用户类打印的函数
*/
@Override
public String toString() {
return "#User"+id+"#"+name+"[#Room"+roomId+"#]<socket:"+socket+">";
}
}

Room类

package Room;
import java.util.ArrayList;
import java.util.List;
import User.User;
/**
*
* @author lannooo
*
*/
public class Room {
private String name;
private long roomId;
private ArrayList<User> list;
private int totalUsers;
/**
* 获得房间的名字
* @return name
*/
public String getName() {
return name;
}
/**
* 设置房间的新名字
* @param name
*/
public void setName(String name) {
this.name = name;
}
/**
* 获得房间的id号
* @return
*/
public long getRoomId() {
return roomId;
}
/**
* 设置房间的id
* @param roomId
*/
public void setRoomId(long roomId) {
this.roomId = roomId;
}
/**
* 向房间中加入一个新用户
* @param user
*/
public void addUser(User user) {
if(!list.contains(user)){
list.add(user);
totalUsers++;
}else{
System.out.println("User is already in Room<"+name+">:"+user);
}
}
/**
* 从房间中删除一个用户
* @param user
* @return 目前该房间中的总用户数目
*/
public int delUser(User user){
if(list.contains(user)){
list.remove(user);
return --totalUsers;
}else{
System.out.println("User is not in Room<"+name+">:"+user);
return totalUsers;
}
}
/**
* 获得当前房间的用户列表
* @return
*/
public ArrayList<User> getUsers(){
return list;
}
/**
* 获得当前房间的用户昵称的列表
* @return
*/
public String[] getUserNames(){
String[] userList = new String[list.size()];
int i=0;
for(User each: list){
userList[i++]=each.getName();
}
return userList;
}
/**
* 使用房间的名称和id来new一个房间
* @param name
* @param roomId
*/
public Room(String name, long roomId) {
this.name=name;
this.roomId=roomId;
this.totalUsers=0;
list = new ArrayList<>();
}
}

RoomList类

package Room;
import java.awt.image.DirectColorModel;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import User.User;
/**
*
* @author lannooo
*
*/
public class RoomList {
private HashMap<Long, Room> map;
private long unusedRoomId;
public static long MAX_ROOMS = 9999;
private int totalRooms;
/**
* 未使用的roomid从1算起，起始的房间总数为0
*/
public RoomList(){
map = new HashMap<>();
unusedRoomId = 1;
totalRooms = 0;
}
/**
* 创建一个新的房间，使用未使用的房间号进行创建，如果没有可以使用的则就创建失败
* @param name： 房间的名字
* @return 创建的房间的id
*/
public long createRoom(String name){
if(totalRooms<MAX_ROOMS){
if(name.length()==0){
name = ""+unusedRoomId;
}
Room room = new Room(name, unusedRoomId);
map.put(unusedRoomId, room);
totalRooms++;
return unusedRoomId++;
}else{
return -1;
}
}
/**
* 用户加入一个房间
* @param user
* @param roomID
* @return
*/
public boolean join(User user, long roomID){
if(map.containsKey(roomID)){
map.get(roomID).addUser(user);
return true;
}else{
return false;
}
}
/**
* 用户退出他的房间
* @param user
* @param roomID
* @return
*/
public int esc(User user, long roomID){
if(map.containsKey(roomID)){
int number = map.get(roomID).delUser(user);
/*如果这个房间剩下的人数为0，那么删除该房间*/
if(number==0){
map.remove(roomID);
totalRooms--;
return 0;
}
return 1;
}else{
return -1;
}
}
/**
* 列出所有房间的列表，返回一个二维数组，strings[i][0]放房间的id，string[i][1]放房间的name
* @return
*/
public String[][] listRooms(){
String[][] strings = new String[totalRooms][2];
int i=0;
/*将map转化为set并使用迭代器来遍历*/
Set<Entry<Long, Room>> set = map.entrySet();
Iterator<Entry<Long, Room>> iterator = set.iterator();
while(iterator.hasNext()){
Map.Entry<Long, Room> entry = iterator.next();
long key = entry.getKey();
Room value = entry.getValue();
strings[i][0]=""+key;
strings[i][1]=value.getName();
}
return strings;
}
/**
* 通过roomID来获得房间
* @param roomID
* @return
*/
public Room getRoom(long roomID){
if(map.containsKey(roomID)){
return map.get(roomID);
}
else
return null;
}
}

服务端

Server

package Server;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import org.json.*;
import Room.Room;
import Room.RoomList;
import User.User;
/**
*
* @author lannooo
*
*/
public class Server {
private ArrayList<User> allUsers;
private RoomList rooms;
private int port;
private ServerSocket ss;
private long unusedUserID;
public final long MAX_USERS = 999999;
/**
* 通过port号来构造服务器端对象
* 维护一个总的用户列表和一个房间列表
* @param port
* @throws Exception
*/
public Server(int port) throws Exception {
allUsers = new ArrayList<>();
rooms = new RoomList();
this.port=port;
unusedUserID=1;
ss = new ServerSocket(port);
System.out.println("Server is builded!");
}
/**
* 获得下一个可用的用户id
* @return
*/
private long getNextUserID(){
if(unusedUserID < MAX_USERS)
return unusedUserID++;
else
return -1;
}
/**
* 开始监听，当接受到新的用户连接，就创建一个新的用户，并添加到用户列表中
* 然后创建一个新的服务线程用于收发该用户的消息
* @throws Exception
*/
public void startListen() throws Exception{
while(true){
Socket socket = ss.accept();
long id = getNextUserID();
if(id != -1){
User user = new User("User"+id, id, socket);
System.out.println(user.getName() + " is login...");
allUsers.add(user);
ServerThread thread = new ServerThread(user, allUsers, rooms);
thread.start();
}else{
System.out.println("Server is full!");
socket.close();
}
}
}
/**
* 测试用main方法，设置侦听端口为9999，并开始监听
* @param args
*/
public static void main(String[] args) {
try {
Server server = new Server(9999);
server.startListen();
} catch (Exception e) {
e.printStackTrace();
}
}
}

ServerThread

package Server;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import Room.Room;
import Room.RoomList;
import User.User;
/**
*
* @author lannooo
*
*/
public class ServerThread extends Thread {
private User user;
private ArrayList<User> userList;/*保存用户列表*/
private RoomList map;   /*保存房间列表*/
private long roomId;
private PrintWriter pw;
/**
* 通过用户的对象实例、全局的用户列表、房间列表进行构造
* @param user
* @param userList
* @param map
*/
public ServerThread(User user,
ArrayList<User> userList, RoomList map){
this.user=user;
this.userList=userList;
this.map=map;
pw=null;
roomId = -1;
}
/**
* 线程运行部分，持续读取用户socket发送来的数据，并解析
*/
public void run(){
try{
while (true) {
String msg=user.getBr().readLine();
System.out.println(msg); /*解析用户的数据格式*/
parseMsg(msg);
}
}catch (SocketException se) { /*处理用户断开的异常*/
System.out.println("user "+user.getName()+" logout.");
}catch (Exception e) { /*处理其他异常*/
e.printStackTrace();
}finally {
try {
/*
* 用户断开或者退出，需要把该用户移除
* 并关闭socket
*/
remove(user);
user.getBr().close();
user.getSocket().close();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
/**
* 用正则表达式匹配数据的格式，根据不同的指令类型，来调用相应的方法处理
* @param msg
*/
private void parseMsg(String msg){
String code = null;
String message=null;
if(msg.length()>0){
/*匹配指令类型部分的字符串*/
Pattern pattern = Pattern.compile("<code>(.*)</code>");
Matcher matcher = pattern.matcher(msg);
if(matcher.find()){
code = matcher.group(1);
}
/*匹配消息部分的字符串*/
pattern = Pattern.compile("<msg>(.*)</msg>");
matcher = pattern.matcher(msg);
if(matcher.find()){
message = matcher.group(1);
}
switch (code) {
case "join":
// add to the room
// code = 1, 直接显示在textArea中
// code = 11, 在list中加入
// code = 21, 把当前房间里的所有用户返回给client
if(roomId == -1){
roomId = Long.parseLong(message);
map.join(user, roomId);
sendRoomMsgExceptSelf(buildCodeWithMsg("<name>"+user.getName()+"</name><id>"+user.getId()+"</id>", 11));
// 这个消息需要加入房间里已有用户的列表
returnMsg(buildCodeWithMsg("你加入了房间:" + map.getRoom(roomId).getName(), 1));
returnMsg(buildCodeWithMsg(getMembersInRoom(), 21));
}else{
map.esc(user, roomId);
sendRoomMsg(buildCodeWithMsg(""+user.getId(), 12));
long oldRoomId = roomId;
roomId = Long.parseLong(message);
map.join(user, roomId);
sendRoomMsgExceptSelf(buildCodeWithMsg("<name>"+user.getName()+"</name><id>"+user.getId()+"</id>", 11));
returnMsg(buildCodeWithMsg("你退出房间:" + map.getRoom(oldRoomId).getName() + ",并加入了房间:" + roomId,1));
returnMsg(buildCodeWithMsg(getMembersInRoom(), 21));
}
break;
case "esc":
// delete from room list
// code = 2， 弹窗提示
// code = 12, 对所有该房间的其他用户发送该用户退出房间的信息，从list中删除
if(roomId!=-1){
int flag=map.esc(user, roomId);
sendRoomMsgExceptSelf(buildCodeWithMsg(""+user.getId(), 12));
long oldRoomId=roomId;
roomId = -1;
returnMsg(buildCodeWithMsg("你已经成功退出房间，不会收到消息", 2));
if(flag==0){
sendMsg(buildCodeWithMsg(""+oldRoomId, 13));
}
}else{
returnMsg(buildCodeWithMsg("你尚未加入任何房间", 2));
}
break;
case "list":
// list all the rooms
// code = 3, 在客户端解析rooms，并填充roomlist
returnMsg(buildCodeWithMsg(getRoomsList(), 3));
break;
case "message":
// send message
// code = 4, 自己收到的话，打印的是‘你说：....'否则打印user id对应的name
sendRoomMsg(buildCodeWithMsg("<from>"+user.getId()+"</from><smsg>"+message+"</smsg>", 4));
break;
case "create":
// create a room
// code=5,提示用户进入了房间
// code=15,需要在其他所有用户的room列表中更新
roomId = map.createRoom(message);
map.join(user, roomId);
sendMsg(buildCodeWithMsg("<rid>"+roomId+"</rid><rname>"+message+"</rname>", 15));
returnMsg(buildCodeWithMsg("你进入了创建的房间："+map.getRoom(roomId).getName(), 5));
returnMsg(buildCodeWithMsg(getMembersInRoom(), 21));
break;
case "setname":
// set name for user
// code=16,告诉房间里的其他人，你改了昵称
user.setName(message);
sendRoomMsg(buildCodeWithMsg("<id>"+user.getId()+"</id><name>"+message+"</name>", 16));
break;
default:
// returnMsg("something unknown");
System.out.println("not valid message from user"+user.getId());
break;
}
}
}
/**
* 获得该用户房间中的所有用户列表，并构造成一定格式的消息返回
* @return
*/
private String getMembersInRoom(){
/*先从room列表获得该用户的room*/
Room room = map.getRoom(roomId);
StringBuffer stringBuffer = new StringBuffer();
if(room != null){
/*获得房间中所有的用户的列表，然后构造成一定的格式发送回去*/
ArrayList<User> users = room.getUsers();
for(User each: users){
stringBuffer.append("<member><name>"+each.getName()+
"</name><id>"+each.getId()+"</id></member>");
}
}
return stringBuffer.toString();
}
/**
* 获得所有房间的列表，并构造成一定的格式
* @return
*/
private String getRoomsList(){
String[][] strings = map.listRooms();
StringBuffer sb = new StringBuffer();
for(int i=0; i<strings.length; i++){
sb.append("<room><rname>"+strings[i][1]+
"</rname><rid>"+strings[i][0]+"</rid></room>");
}
return sb.toString();
}
/**
* 构造成一个统一的消息格式
* @param msg
* @param code
* @return
*/
private String buildCodeWithMsg(String msg, int code){
return "<code>"+code+"</code><msg>"+msg+"</msg>\n";
}
/**
* 这个是群发消息：全体用户,code>10
* @param msg
*/
private void sendMsg(String msg) {
//  System.out.println("In sendMsg()");
/*取出用户列表中的每一个用户来发送消息*/
for(User each:userList){
try {
pw=each.getPw();
pw.println(msg);
pw.flush();
System.out.println(msg);
} catch (Exception e) {
System.out.println("exception in sendMsg()");
}
}
}
/**
* 只对同一房间的用户发：code>10
* @param msg
*/
private void sendRoomMsg(String msg){
/*先获得该用户的房间号，然后往该房间发送消息*/
Room room = map.getRoom(roomId);
if(room != null){
ArrayList<User> users = room.getUsers();
for(User each: users){
pw = each.getPw();
pw.println(msg);
pw.flush();
}
}
}
/**
* 向房间中除了该用户自己，发送消息
* @param msg
*/
private void sendRoomMsgExceptSelf(String msg){
Room room = map.getRoom(roomId);
if(room != null){
ArrayList<User> users = room.getUsers();
for(User each: users){
if(each.getId()!=user.getId()){
pw = each.getPw();
pw.println(msg);
pw.flush();
}
}
}
}
/**
* 对于client的来信，返回一个结果,code<10
* @param msg
*/
private void returnMsg(String msg){
try{
pw = user.getPw();
pw.println(msg);
pw.flush();
}catch (Exception e) {
System.out.println("exception in returnMsg()");
}
}
/**
* 移除该用户，并向房间中其他用户发送该用户已经退出的消息
* 如果房间中没人了，那么就更新房间列表给所有用户
* @param user
*/
private void remove(User user){
if(roomId!=-1){
int flag=map.esc(user, roomId);
sendRoomMsgExceptSelf(buildCodeWithMsg(""+user.getId(), 12));
long oldRoomId=roomId;
roomId = -1;
if(flag==0){
sendMsg(buildCodeWithMsg(""+oldRoomId, 13));
}
}
userList.remove(user);
}
}

客户端

Client

package Client;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.DefaultListModel;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.text.BadLocationException;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
/**
*
* @author lannooo
*
*/
public class Client implements ActionListener{
private JFrame frame;
private Socket socket;
private BufferedReader br;
private PrintWriter pw;
private String name;
private HashMap<String, Integer> rooms_map;
private HashMap<String, Integer> users_map;
private JTextField host_textfield;
private JTextField port_textfield;
private JTextField text_field;
private JTextField name_textfiled;
private JLabel rooms_label;
private JLabel users_label;
private JList<String> roomlist;
private JList<String> userlist;
private JTextPane msgArea;
private JScrollPane textScrollPane;
private JScrollBar vertical;
DefaultListModel<String> rooms_model;
DefaultListModel<String> users_model;
/*
* 构造函数
* 该客户端对象维护两个map，房间的hashmap和房间中用户的hashmap
* 作为列表组件的数据模型
*/
public Client(){
rooms_map = new HashMap<>();
users_map = new HashMap<>();
initialize();
}
/**
* 连接服务端，指定host和port
* @param host
* @param port
* @return
*/
public boolean connect(String host, int port){
try {
socket = new Socket(host, port);
System.out.println("Connected to server!"+socket.getRemoteSocketAddress());
br=new BufferedReader(new InputStreamReader(System.in));
pw=new PrintWriter(socket.getOutputStream());
/*
* 创建一个接受和解析服务器消息的线程
* 传入当前客户端对象的指针，作为句柄调用相应的处理函数
*/
ClientThread thread = new ClientThread(socket, this);
thread.start();
return true;
} catch (IOException e) {
System.out.println("Server error");
JOptionPane.showMessageDialog(frame, "服务器无法连接！");
return false;
}
}
/*当前进程作为只发送消息的线程，从命令行中获取输入*/
// public void sendMsg(){
//  String msg;
//  try {
//   while(true){
//    msg = br.readLine();
//    pw.println(msg);
//    pw.flush();
//   }
//  } catch (IOException e) {
//   System.out.println("error when read msg and to send.");
//  }
// }
/**
* 发给服务器的消息，先经过一定的格式构造再发送
* @param msg
* @param code
*/
public void sendMsg(String msg, String code){
try {
pw.println("<code>"+code+"</code><msg>"+msg+"</msg>");
pw.flush();
} catch (Exception e) {
//一般是没有连接的问题
System.out.println("error in sendMsg()");
JOptionPane.showMessageDialog(frame, "请先连接服务器！");
}
}
/**
* 窗口初始化
*/
private void initialize() {
/*设置窗口的UI风格和字体*/
setUIStyle();
setUIFont();
JFrame frame = new JFrame("ChatOnline");
JPanel panel = new JPanel();  /*主要的panel，上层放置连接区，下层放置消息区，
中间是消息面板，左边是room列表，右边是当前room的用户列表*/
JPanel headpanel = new JPanel(); /*上层panel，用于放置连接区域相关的组件*/
JPanel footpanel = new JPanel(); /*下层panel，用于放置发送信息区域的组件*/
JPanel leftpanel = new JPanel(); /*左边panel，用于放置房间列表和加入按钮*/
JPanel rightpanel = new JPanel(); /*右边panel，用于放置房间内人的列表*/
/*最上层的布局，分中间，东南西北五个部分*/
BorderLayout layout = new BorderLayout();
/*格子布局，主要用来设置西、东、南三个部分的布局*/
GridBagLayout gridBagLayout = new GridBagLayout();
/*主要设置北部的布局*/
FlowLayout flowLayout = new FlowLayout();
/*设置初始窗口的一些性质*/
frame.setBounds(100, 100, 800, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(panel);
frame.setLayout(layout);
/*设置各个部分的panel的布局和大小*/
headpanel.setLayout(flowLayout);
footpanel.setLayout(gridBagLayout);
leftpanel.setLayout(gridBagLayout);
rightpanel.setLayout(gridBagLayout);
leftpanel.setPreferredSize(new Dimension(130, 0));
rightpanel.setPreferredSize(new Dimension(130, 0));
/*以下均是headpanel中的组件*/
host_textfield = new JTextField("127.0.0.1");
port_textfield = new JTextField("9999");
name_textfiled = new JTextField("匿名");
host_textfield.setPreferredSize(new Dimension(100, 25));
port_textfield.setPreferredSize(new Dimension(70, 25));
name_textfiled.setPreferredSize(new Dimension(150, 25));
JLabel host_label = new JLabel("服务器IP");
JLabel port_label = new JLabel("端口");
JLabel name_label = new JLabel("昵称");
JButton head_connect = new JButton("连接");
//  JButton head_change = new JButton("确认更改");
JButton head_create = new JButton("创建房间");
headpanel.add(host_label);
headpanel.add(host_textfield);
headpanel.add(port_label);
headpanel.add(port_textfield);
headpanel.add(head_connect);
headpanel.add(name_label);
headpanel.add(name_textfiled);
//  headpanel.add(head_change);
headpanel.add(head_create);
/*以下均是footpanel中的组件*/
JButton foot_emoji = new JButton("表情");
JButton foot_send = new JButton("发送");
text_field = new JTextField();
footpanel.add(text_field, new GridBagConstraints(0, 0, 1, 1, 100, 100,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
footpanel.add(foot_emoji, new GridBagConstraints(1, 0, 1, 1, 1.0, 1.0,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
footpanel.add(foot_send, new GridBagConstraints(2, 0, 1, 1, 1.0, 1.0,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
/*两边的格子中的组件*/
rooms_label = new JLabel("当前房间数：0");
users_label = new JLabel("房间内人数：0");
JButton join_button = new JButton("加入房间");
JButton esc_button = new JButton("退出房间");
rooms_model = new DefaultListModel<>();
users_model = new DefaultListModel<>();
//  rooms_model.addElement("房间1");
//  rooms_model.addElement("房间2");
//  rooms_model.addElement("房间3");
//  String fangjian = "房间1";
//  rooms_map.put(fangjian, 1);
roomlist = new JList<>(rooms_model);
userlist = new JList<>(users_model);
JScrollPane roomListPane = new JScrollPane(roomlist);
JScrollPane userListPane = new JScrollPane(userlist);
leftpanel.add(rooms_label, new GridBagConstraints(0, 0, 1, 1, 1, 1,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
leftpanel.add(join_button, new GridBagConstraints(0, 1, 1, 1, 1, 1,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
leftpanel.add(esc_button, new GridBagConstraints(0, 2, 1, 1, 1, 1,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
leftpanel.add(roomListPane, new GridBagConstraints(0, 3, 1, 1, 100, 100,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
rightpanel.add(users_label, new GridBagConstraints(0, 0, 1, 1, 1, 1,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
rightpanel.add(userListPane,new GridBagConstraints(0, 1, 1, 1, 100, 100,
GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
/*中间的文本区组件*/
msgArea = new JTextPane();
msgArea.setEditable(false);
textScrollPane = new JScrollPane();
textScrollPane.setViewportView(msgArea);
vertical = new JScrollBar(JScrollBar.VERTICAL);
vertical.setAutoscrolls(true);
textScrollPane.setVerticalScrollBar(vertical);
/*设置顶层布局*/
panel.add(headpanel, "North");
panel.add(footpanel, "South");
panel.add(leftpanel, "West");
panel.add(rightpanel, "East");
panel.add(textScrollPane, "Center");
/*注册各种事件*/
/*连接服务器*/
head_connect.addActionListener(this);
/*发送消息，如果没有连接则会弹窗提示*/
foot_send.addActionListener(this);
/*改名字*/
//  head_change.addActionListener(this);
/*创建房间*/
head_create.addActionListener(this);
/*发送表情*/
foot_emoji.addActionListener(this);
/*加入room*/
join_button.addActionListener(this);
/*退出房间*/
esc_button.addActionListener(this);
/*最终显示*/
frame.setVisible(true);
}
/**
* 事件监听处理
*/
@Override
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
switch (cmd) {
case "连接": /*点击连接按钮*/
String strhost = host_textfield.getText();
String strport = port_textfield.getText();
connect(strhost, Integer.parseInt(strport));
String nameSeted = JOptionPane.showInputDialog("请输入你的昵称："); /*提示输入昵称*/
name_textfiled.setText(nameSeted);
name_textfiled.setEditable(false);
port_textfield.setEditable(false);
host_textfield.setEditable(false);
/*发送设置姓名的消息和列出用户列表的消息*/
sendMsg(nameSeted, "setname");
sendMsg("", "list");
break;
//  case "确认更改":
//   String strname = name_textfiled.getText();
//   name = strname;
//   sendMsg(strname, "setname");
//   break;
case "加入房间": /*选择房间后，点击加入房间按钮*/
String selected = roomlist.getSelectedValue();
if(rooms_map.containsKey(selected)){
sendMsg(""+rooms_map.get(selected), "join");
}
break;
case "退出房间": /*点击退出房间的按钮*/
sendMsg("", "esc");
break;
case "发送":  /*点击发送消息的按钮*/
String text = text_field.getText();
text_field.setText("");
sendMsg(text, "message");
break;
case "表情":  /*发送表情，新建一个表情窗口，并直接在表情窗口中处理消息发送*/
IconDialog dialog = new IconDialog(frame, this);
break;
case "创建房间": /*点击创建房间的按钮，弹出提示框数据房间名称*/
String string = JOptionPane.showInputDialog("请输入你的房间名称");
if(string==null || string.equals("")){
string = name+(int)(Math.random()*10000)+"的房间";
}
sendMsg(string, "create");
break;
default:
break;
}
}
/*很多辅助和clientThread互动的*/
/**
* 加入用户，通过正则表达式，匹配消息内容中的用户信息
* @param content
*/
public void addUser(String content){
if(content.length()>0){
Pattern pattern = Pattern.compile("<name>(.*)</name><id>(.*)</id>");
Matcher matcher = pattern.matcher(content);
if(matcher.find()){
/*
* 获得用户的name和id
* 加入用户列表
* 在消息区显示系统提示
*/
String name = matcher.group(1);
String id = matcher.group(2);
insertUser(Integer.parseInt(id), name);
insertMessage(textScrollPane, msgArea, null, "系统：", name+"加入了聊天室");
}
}
users_label.setText("房间内人数："+users_map.size()); /*更新房间内的人数*/
}
/**
* 删除用户
* @param content
*/
public void delUser(String content){
if(content.length()>0){
int id = Integer.parseInt(content);
/*
* 从维护的用户map中取得所有的用户名字，然后去遍历匹配的用户
* 匹配到的用户名字从相应的数据模型中移除
* 并从map中移除，并在消息框中提示系统消息
*/
Set<String> set = users_map.keySet();
Iterator<String> iter = set.iterator();
String name=null;
while(iter.hasNext()){
name = iter.next();
if(users_map.get(name)==id){
users_model.removeElement(name);
break;
}
}
users_map.remove(name);
insertMessage(textScrollPane, msgArea, null, "系统：", name+"退出了聊天室");
}
users_label.setText("房间内人数："+users_map.size());
}
/**
* 更新用户信息
* @param content
*/
public void updateUser(String content){
if(content.length()>0){
Pattern pattern = Pattern.compile("<id>(.*)</id><name>(.*)</name>");
Matcher matcher = pattern.matcher(content);
if(matcher.find()){
String id = matcher.group(1);
String name = matcher.group(2);
insertUser(Integer.parseInt(id), name);
}
}
}
/**
* 列出所有用户
* @param content
*/
public void listUsers(String content){
String name = null;
String id=null;
Pattern rough_pattern=null;
Matcher rough_matcher=null;
Pattern detail_pattern=null;
/*
* 先用正则表达式匹配用户信息
* 然后插入数据模型中
* 并更新用户数据模型中的条目
*/
if(content.length()>0){
rough_pattern = Pattern.compile("<member>(.*?)</member>");
rough_matcher = rough_pattern.matcher(content);
while(rough_matcher.find()){
String detail = rough_matcher.group(1);
detail_pattern = Pattern.compile("<name>(.*)</name><id>(.*)</id>");
Matcher detail_matcher = detail_pattern.matcher(detail);
if(detail_matcher.find()){
name = detail_matcher.group(1);
id = detail_matcher.group(2);
insertUser(Integer.parseInt(id), name);
}
}
}
users_label.setText("房间内人数："+users_map.size());
}
/**
* 直接在textarea中显示消息
* @param content
*/
public void updateTextArea(String content){
insertMessage(textScrollPane, msgArea, null, "系统：", content);
}
/**
* 在textarea中显示其他用户的消息
* 先用正则匹配，再显示消息
* 其中还需要匹配emoji表情的编号
* @param content
*/
public void updateTextAreaFromUser(String content){
if(content.length()>0){
Pattern pattern = Pattern.compile("<from>(.*)</from><smsg>(.*)</smsg>");
Matcher matcher = pattern.matcher(content);
if(matcher.find()){
String from = matcher.group(1);
String smsg = matcher.group(2);
String fromName = getUserName(from);
if(fromName.equals(name))
fromName = "你";
if(smsg.startsWith("<emoji>")){
String emojiCode = smsg.substring(7, smsg.length()-8);
//     System.out.println(emojiCode);
insertMessage(textScrollPane, msgArea, emojiCode, fromName+"说：", null);
return ;
}
insertMessage(textScrollPane, msgArea, null, fromName+"说：", smsg);
}
}
}
/**
* 显示退出的结果
* @param content
*/
public void showEscDialog(String content){
JOptionPane.showMessageDialog(frame, content);
/*清除消息区内容，清除用户数据模型内容和用户map内容，更新房间内人数*/
msgArea.setText("");
users_model.clear();
users_map.clear();
users_label.setText("房间内人数：0");
}
/**
* 新增一个room
* @param content
*/
public void addRoom(String content){
if(content.length()>0){
Pattern pattern = Pattern.compile("<rid>(.*)</rid><rname>(.*)</rname>");
Matcher matcher = pattern.matcher(content);
if(matcher.find()){
String rid = matcher.group(1);
String rname = matcher.group(2);
insertRoom(Integer.parseInt(rid), rname);
}
}
rooms_label.setText("当前房间数："+rooms_map.size());
}
/**
* 删除一个room
* @param content
*/
public void delRoom(String content){
if(content.length()>0){
int delRoomId = Integer.parseInt(content);
Set<String> set = rooms_map.keySet();
Iterator<String> iter = set.iterator();
String rname=null;
while(iter.hasNext()){
rname = iter.next();
if(rooms_map.get(rname)==delRoomId){
rooms_model.removeElement(rname);
break;
}
}
rooms_map.remove(rname);
}
rooms_label.setText("当前房间数："+rooms_map.size());
}
/**
* 列出目前所有的rooms
* @param content
*/
public void listRooms(String content){
String rname = null;
String rid=null;
Pattern rough_pattern=null;
Matcher rough_matcher=null;
Pattern detail_pattern=null;
if(content.length()>0){
rough_pattern = Pattern.compile("<room>(.*?)</room>");
rough_matcher = rough_pattern.matcher(content);
while(rough_matcher.find()){
String detail = rough_matcher.group(1);
detail_pattern = Pattern.compile("<rname>(.*)</rname><rid>(.*)</rid>");
Matcher detail_matcher = detail_pattern.matcher(detail);
if(detail_matcher.find()){
rname = detail_matcher.group(1);
rid = detail_matcher.group(2);
insertRoom(Integer.parseInt(rid), rname);
}
}
}
rooms_label.setText("当前房间数："+rooms_map.size());
}
/**
* 插入一个room
* @param rid
* @param rname
*/
private void insertRoom(Integer rid, String rname){
if(!rooms_map.containsKey(rname)){
rooms_map.put(rname, rid);
rooms_model.addElement(rname);
}else{
rooms_map.remove(rname);
rooms_model.removeElement(rname);
rooms_map.put(rname, rid);
rooms_model.addElement(rname);
}
rooms_label.setText("当前房间数："+rooms_map.size());
}
/**
* 插入一个user
* @param id
* @param name
*/
private void insertUser(Integer id, String name){
if(!users_map.containsKey(name)){
users_map.put(name, id);
users_model.addElement(name);
}else{
users_map.remove(name);
users_model.removeElement(name);
users_map.put(name, id);
users_model.addElement(name);
}
users_label.setText("房间内人数："+users_map.size());
}
/**
* 获得用户的姓名
* @param strId
* @return
*/
private String getUserName(String strId){
int uid = Integer.parseInt(strId);
Set<String> set = users_map.keySet();
Iterator<String> iterator = set.iterator();
String cur=null;
while(iterator.hasNext()){
cur = iterator.next();
if(users_map.get(cur)==uid){
return cur;
}
}
return "";
}
/**
* 获得用户所在房间的名称
* @param strId
* @return
*/
private String getRoomName(String strId){
int rid = Integer.parseInt(strId);
Set<String> set = rooms_map.keySet();
Iterator<String> iterator = set.iterator();
String cur = null;
while(iterator.hasNext()){
cur = iterator.next();
if(rooms_map.get(cur)==rid){
return cur;
}
}
return "";
}
/**
* 打印一条消息，如果有图片就打印图片，否则打印content
* @param scrollPane
* @param textPane
* @param icon_code
* @param title
* @param content
*/
private void insertMessage(JScrollPane scrollPane, JTextPane textPane,
String icon_code, String title, String content){
StyledDocument document = textPane.getStyledDocument();  /*获取textpane中的文本*/
/*设置标题的属性*/
SimpleAttributeSet title_attr = new SimpleAttributeSet();
StyleConstants.setBold(title_attr, true);
StyleConstants.setForeground(title_attr, Color.BLUE);
/*设置正文的属性*/
SimpleAttributeSet content_attr = new SimpleAttributeSet();
StyleConstants.setBold(content_attr, false);
StyleConstants.setForeground(content_attr, Color.BLACK);
Style style = null;
if(icon_code!=null){
Icon icon = new ImageIcon("icon/"+icon_code+".png");
style = document.addStyle("icon", null);
StyleConstants.setIcon(style, icon);
}
try {
document.insertString(document.getLength(), title+"\n", title_attr);
if(style!=null)
document.insertString(document.getLength(), "\n", style);
else
document.insertString(document.getLength(), " "+content+"\n", content_attr);
} catch (BadLocationException ex) {
System.out.println("Bad location exception");
}
/*设置滑动条到最后*/
vertical.setValue(vertical.getMaximum());
}
/**
* 设置需要美化字体的组件
*/
public static void setUIFont()
{
Font f = new Font("微软雅黑", Font.PLAIN, 14);
String names[]={ "Label", "CheckBox", "PopupMenu","MenuItem", "CheckBoxMenuItem",
"JRadioButtonMenuItem","ComboBox", "Button", "Tree", "ScrollPane",
"TabbedPane", "EditorPane", "TitledBorder", "Menu", "TextArea","TextPane",
"OptionPane", "MenuBar", "ToolBar", "ToggleButton", "ToolTip",
"ProgressBar", "TableHeader", "Panel", "List", "ColorChooser",
"PasswordField","TextField", "Table", "Label", "Viewport",
"RadioButtonMenuItem","RadioButton", "DesktopPane", "InternalFrame"
};
for (String item : names) {
UIManager.put(item+ ".font",f);
}
}
/**
* 设置UI风格为当前系统的风格
*/
public static void setUIStyle(){
String lookAndFeel =UIManager.getSystemLookAndFeelClassName();
try {
UIManager.setLookAndFeel(lookAndFeel);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnsupportedLookAndFeelException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 测试用的main函数
* @param args
*/
public static void main(String[] args) {
Client client = new Client();
}
}

ClientThread

package Client;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
*
* @author lannooo
*
*/
public class ClientThread extends Thread{
private Socket socket;
private Client client;
private BufferedReader br;
private PrintWriter pw;
/**
* 从过主线程传入的socket和client对象来构造
* @param socket
* @param client
*/
public ClientThread(Socket socket, Client client){
this.client = client;
this.socket = socket;
try {
br=new BufferedReader(new InputStreamReader(socket.getInputStream()));
} catch (IOException e) {
System.out.println("cannot get inputstream from socket.");
}
}
/**
* 不断的读数据并处理
* 调用主线程的方法来处理：client.method();
*/
public void run() {
try{
br=new BufferedReader(new InputStreamReader(socket.getInputStream()));
while(true){
String msg = br.readLine();
parseMessage(msg);
}
}catch (Exception e) {
e.printStackTrace();
}
}
/**
* 处理从服务器收到的消息
* @param message
*/
public void parseMessage(String message){
String code = null;
String msg=null;
/*
* 先用正则表达式匹配code码和msg内容
*/
if(message.length()>0){
Pattern pattern = Pattern.compile("<code>(.*)</code>");
Matcher matcher = pattern.matcher(message);
if(matcher.find()){
code = matcher.group(1);
}
pattern = Pattern.compile("<msg>(.*)</msg>");
matcher = pattern.matcher(message);
if(matcher.find()){
msg = matcher.group(1);
}
System.out.println(code+":"+msg);
switch(code){
case "1": /*一个普通消息处理*/
client.updateTextArea(msg);
break;
case "2": /*退出消息*/
client.showEscDialog(msg);
break;
case "3": /*列出房间*/
client.listRooms(msg);
break;
case "4": /*其他用户的消息*/
client.updateTextAreaFromUser(msg);
break;
case "5": /*普通消息处理*/
client.updateTextArea(msg);
break;
case "11": /*添加用户*/
client.addUser(msg);
break;
case "12": /*删除用户*/
client.delUser(msg);
break;
case "13": /*删除房间*/
client.delRoom(msg);
break;
case "15": /*添加房间*/
client.addRoom(msg);
break;
case "16": /*更新用户名称*/
client.updateUser(msg);
break;
case "21": /*列出用户列表*/
client.listUsers(msg);
break;
}
}
}
}

IconDialog（选择表情界面）

package Client;
import java.awt.Container;
import java.awt.Dialog;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
/**
*
* @author lannooo
*
*/
public class IconDialog implements ActionListener {
private JDialog dialog;
private Client client;
/**
* 通过frame和客户端对象来构造
* @param frame
* @param client
*/
public IconDialog(JFrame frame, Client client) {
this.client = client;
dialog = new JDialog(frame, "请选择表情", true);
/*16个表情*/
JButton[] icon_button = new JButton[16];
ImageIcon[] icons = new ImageIcon[16];
/*获得弹出窗口的容器，设置布局*/
Container dialogPane = dialog.getContentPane();
dialogPane.setLayout(new GridLayout(0, 4));
/*加入表情*/
for(int i=1; i<=15; i++){
icons[i] = new ImageIcon("icon/"+i+".png");
icons[i].setImage(icons[i].getImage().getScaledInstance(50, 50, Image.SCALE_DEFAULT));
icon_button[i] = new JButton(""+i, icons[i]);
icon_button[i].addActionListener(this);
dialogPane.add(icon_button[i]);
}
dialog.setBounds(200,266,266,280);
dialog.show();
}
@Override
public void actionPerformed(ActionEvent e) {
/*构造emoji结构的消息发送*/
String cmd = e.getActionCommand();
System.out.println(cmd);
dialog.dispose();
client.sendMsg("<emoji>"+cmd+"</emoji>", "message");
}
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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