javachat

㈠ java简单聊天程序

package com.kum.im.hrserver.test;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
import java.awt.*;
import java.awt.event.*;
public class ChatClient {
private SocketChannel sc = null;
private String name = null;
private Frame f;
private TextArea ta;
private TextField tf;
private boolean runnable = true;
public static void main(String[] args){
ChatClient cc = new ChatClient();
cc.createUI();
cc.inputName();
cc.connect();
new ReceiveThread(cc,cc.getTextArea()).start();
}
public SocketChannel getSc(){
return sc;
}
public void setName(String name){
this.name = name;
}
public TextArea getTextArea(){
return ta;
}
public TextField getTextField(){
return tf;
}
public boolean getRunnable(){
return runnable;
}
public void stop(){
runnable = false;
}

public void shutDown(){
try{
sc.write(ByteBuffer.wrap("bye".getBytes("UTF-8")));
ta.append("Exit in 5 seconds!");
this.stop();
Thread.sleep(5000);
sc.close();
}catch(Exception e){
e.printStackTrace();
}
System.exit(0);
}
public void createUI(){
f = new Frame("Client");
ta = new TextArea();
ta.setEditable(false);
tf = new TextField();
Button send = new Button("Send");
Panel p = new Panel();
p.setLayout(new BorderLayout());
p.add(tf,"Center");
p.add(send,"East");
f.add(ta,"Center");
f.add(p,"South");
MyClientListener listener = new MyClientListener(this);
send.addActionListener(listener);
tf.addActionListener(listener);
f.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
ChatClient.this.shutDown();
}
});
f.setSize(400,400);
f.setLocation(600,0);
f.setVisible(true);
tf.requestFocus();
}
public boolean connect(){
try{
sc = SocketChannel.open();
//"zlg"为目标计算机名
InetSocketAddress isa = new InetSocketAddress("192.168.1.43",8814);
sc.connect(isa);
sc.configureBlocking(false);
sc.write(ByteBuffer.wrap(name.getBytes("UTF-8")));
}catch(Exception e){
e.printStackTrace();
}
return true;
}

public void inputName(){
String name = javax.swing.JOptionPane.showInputDialog("Input Your Name:");
this.setName(name);
f.setTitle(name);
}
}
class MyClientListener implements ActionListener{
private ChatClient client;
public MyClientListener(ChatClient client){
this.client = client;
}
public void actionPerformed(ActionEvent e){
TextField tf = client.getTextField();
String info = tf.getText();
if(info.equals("bye")){
client.shutDown();
}else{
try{
client.getSc().write(ByteBuffer.wrap(info.getBytes("UTF-8")));
}catch (Exception e1) {
e1.printStackTrace();
}
}
tf.setText("");
tf.requestFocus();
}
}
class ReceiveThread extends Thread{
private ChatClient client;
private TextArea ta;
public ReceiveThread(ChatClient client,TextArea ta){
this.client = client;
this.ta = ta;
}
public void run(){
SocketChannel sc = client.getSc();
ByteBuffer byteBuffer = ByteBuffer.allocate(2048);
CharBuffer charBuffer = null;
Charset charset = Charset.forName("UTF-8");
CharsetDecoder decoder = charset.newDecoder();
String msg = null;
int n = 0;
try{
while(client.getRunnable()){
n = sc.read(byteBuffer);
if(n>0){
byteBuffer.flip();
charBuffer = decoder.decode(byteBuffer);
msg = charBuffer.toString();
ta.append(msg + "\n");
}
byteBuffer.clear();
Thread.sleep(500);
}
}catch(Exception e){
e.printStackTrace();
System.exit(0);
}
}
}

import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
import java.net.*;
import java.util.*;

public class ICQServer {
private Selector selector = null;
private ServerSocketChannel ssc = null;
//服务器端通信端口号
private int port = 8814;
//在线用户列表
private Hashtable<String, SocketChannel> userList = null;

public ICQServer() {}

public ICQServer(int port) {
this.port = port;
}

//初始化服务器
public void init() {
try {
//创建选择器对象
selector = Selector.open();
//创建ServerSocketChannel
ssc = ServerSocketChannel.open();
//设置ServerSocketChannel为非阻塞模式
ssc.configureBlocking(false);
InetAddress ip = InetAddress.getLocalHost();
System.out.println("主机地址 --------> " + ip);
InetSocketAddress isa = new InetSocketAddress(ip, port);
//将与本通道相关的服务器套接字对象绑定到指定地址和端口
ssc.socket().bind(isa);
//创建在线用户列表
userList = new Hashtable<String, SocketChannel> ();
}
catch (IOException e) {
System.out.println("初始化服务器时异常，原因 --------> " + e.getMessage());
}
}

//启动服务器
public void start() {
try {
//将ServerSocketChannel注册到Selector上，准备接收新连接请求
SelectionKey acceptKey = ssc.register(selector, SelectionKey.OP_ACCEPT);
SocketChannel sc;
int n;
String name; //用户名
String msg; //用户发言信息
while (true) {
//选择当前所有处于就绪状态的通道所对应的选择键,并将这些键组成已选择键集
n = selector.select(); //n为已选择键集中键的个数
if (n > 0) {
//获取此选择器的已选择键集。
Set readyKeys = selector.selectedKeys();
Iterator it = readyKeys.iterator();
//遍历当前已选择键集
while (it.hasNext()) {
SelectionKey key = (SelectionKey) it.next();
//从当前已选择键集中移除当前键，避免重复处理
it.remove();
//如果当前键对应的通道已准备好接受新的套接字连接
if (key.isAcceptable()) {
//获取当前键对应的可选择通道（ServerSocketChannel）
ssc = (ServerSocketChannel) key.channel();
//接收新的套接字连接请求，返回新建的SocketChannel
sc = (SocketChannel) ssc.accept();
//如果有新用户接入
if (sc != null) {
//接收新上线用户姓名
name = readMessage(sc);
//设置新建的SocketChannel为非阻塞模式
sc.configureBlocking(false);
//将新建的SocketChannel注册到Selector上，准备进行数据"写"操作，
//并将当前用户名以附件的方式附带记录到新建的选择键上。
SelectionKey newKey = sc.register(selector,
SelectionKey.OP_WRITE, name);
//将新上线用户信息加入到在线用户列表
userList.put(name, sc);
//发送"新用户上线"通知
transmitMessage(name + " in!", "--Server Info--");
}
}
//否则，如果当前键对应的通道已准备好进行"写"操作
else if (key.isWritable()) {
//获取当前键对应的可选择通道（SocketChannel）
sc = (SocketChannel) key.channel();
//接收该通道相应用户的发言信息
msg = readMessage(sc);
//获取选择键上附带记录的当前用户名
name = key.attachment().toString();
//如果用户提出要下线
if (msg.equals("bye")) {
//从在线用户列表中移除当前用户
userList.remove(name);
//注销当前选择键对应的注册关系
key.cancel();
//关闭当前可选择通道
sc.close();
//发送"用户下线"通知
transmitMessage(name + " out!", "--Server Info--");
}
//否则，如果接收到的用户发言信息非空（""）
else if (msg.length() > 0) {
//转发用户发言信息
transmitMessage(msg, name);
}
}
}
}
//延时循环，降低服务器端处理负荷
Thread.sleep(500);
}
}
catch (Exception e) {
System.out.println("启动服务器时异常，原因 --------> " + e.getMessage());
}
}

//转发用户发言信息
public void transmitMessage(String msg, String name) {
try {
ByteBuffer buffer = ByteBuffer.wrap( (name + ":" + msg).getBytes("UTF-8"));
//将字节数组包装到缓冲区中
Collection channels = userList.values();
SocketChannel sc;
for (Object o : channels) {
sc = (SocketChannel) o;
sc.write(buffer);
//将缓冲区数据写入聊天面板(TextArea)
buffer.flip();
//将缓冲区ByteBuffer的极限值设置为当前数据实际大小，将缓冲区的值设置为0
}
}
catch (Exception e) {
System.out.println("转发用户发言信息时异常，原因 --------> " + e.getMessage());
}
}

//接收用户发言信息
public String readMessage(SocketChannel sc) {
String result = null;
int n = 0;
ByteBuffer buf = ByteBuffer.allocate(1024);
try {
n = sc.read(buf);
buf.flip();
Charset charset = Charset.forName("UTF-8");
CharsetDecoder decoder = charset.newDecoder();
CharBuffer charBuffer = decoder.decode(buf);
result = charBuffer.toString();
}
catch (IOException e) {
System.out.println("接收用户发言信息时异常，原因 --------> " + e.getMessage());
}
return result;
}

public static void main(String args[]) {
ICQServer server = new ICQServer();
server.init();
server.start();
}
}

㈡ 微信是用什么语言开发的

一般安卓手机的应用软件目前都是以Java为主的程序语言开发的，包括微信。

许多的Android应用都是Java程序员开发者开发。虽然 Android运用了不同的JVM以及不同的封装方式，但是代码还是用Java语言所编写。相当一部分的手机中都支持JAVA游戏，这就使很多非编程人员都认识了JAVA。

(2)javachat扩展阅读

Java 语言是一门随时代快速发展的计算机语言程序，其深刻展示了程序编写的精髓，加上其简明严谨的结构及简洁的语法编写为其将来的发展及维护提供了保障。由于提供了网络应用的支持和多媒体的存取，会推动Internet和企业网络的Web的应用 。

另外，为了保持Java的增长和推进Java社区的参与，Sun公司在Java One开发者大会上宣布开放Java核心源代码，以鼓励更多的人参与到Java社团活动中。来自Java社团和IBM等全球技术合作伙伴两方面的支持，

Java技术在创新和社会进步上继续发挥强有力的重要作用，并且随着其程序编写难度的降低使得更多专业人员将精力放置于Java语言的编写与框架结构的设计中。

㈢ 给我提供一个Java编写的聊天工具原代码

//聊天室的客户端
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
import java.awt.event.*;
public class ChatClient extends Applet{
protected boolean loggedIn;//登入状态
protected Frame cp;//聊天室框架
protected static int PORTNUM=7777; //缺省端口号7777
protected int port;//实际端口号
protected Socket sock;
protected BufferedReader is;//用于从sock读取数据的BufferedReader
protected PrintWriter pw;//用于向sock写入数据的PrintWriter
protected TextField tf;//用于输入的TextField
protected TextArea ta;//用于显示对话的TextArea
protected Button lib;//登入按钮
protected Button lob;//登出的按钮
final static String TITLE ="Chatroom applet>>>>>>>>>>>>>>>>>>>>>>>>";
protected String paintMessage;//发表的消息
public ChatParameter Chat;
public void init(){
paintMessage="正在生成聊天窗口";
repaint();
cp=new Frame(TITLE);
cp.setLayout(new BorderLayout());
String portNum=getParameter("port");//呢个参数勿太明
port=PORTNUM;
if (portNum!=null) //书上是portNum==null,十分有问题
port=Integer.parseInt(portNum);
//CGI
ta=new TextArea(14,80);
ta.setEditable(false);//read only attribute
ta.setFont(new Font("Monospaced",Font.PLAIN,11));
cp.add(BorderLayout.NORTH,ta);
Panel p=new Panel();
Button b;
//for login button
p.add(lib=new Button("Login"));
lib.setEnabled(true);
lib.requestFocus();
lib.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e){
login();
lib.setEnabled(false);
lob.setEnabled(true);
tf.requestFocus();//将键盘输入锁定再右边的文本框中
}
});
//for logout button
p.add(lob=new Button ("Logout"));
lob.setEnabled(false);
lob.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
logout();
lib.setEnabled(true);
lob.setEnabled(false);
lib.requestFocus();
}
});
p.add(new Label ("输入消息:"));
tf=new TextField(40);
tf.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
if(loggedIn){
//pw.println(Chat.CMD_BCAST+tf.getText());//Chat.CMD....是咩野来?
int j=tf.getText().indexOf(":");
if(j>0) pw.println(Chat.CMD_MESG+tf.getText());
else
pw.println(Chat.CMD_BCAST+tf.getText());
tf.setText("");//勿使用flush()?
}
}
});
p.add(tf);
cp.add(BorderLayout.SOUTH,p);
cp.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
//如果执行了setVisible或者dispose,关闭窗口
ChatClient.this.cp.setVisible(false);
ChatClient.this.cp.dispose();
logout();
}
});
cp.pack();//勿明白有咩用?
//将Frame cp放在中间
Dimension us=cp.getSize(),
them=Toolkit.getDefaultToolkit().getScreenSize();
int newX=(them.width-us.width)/2;
int newY=(them.height-us.height)/2;
cp.setLocation(newX,newY);
cp.setVisible(true);
paintMessage="Window should now be visible";
repaint();
}
//登录聊天室
public void login(){
if(loggedIn) return;
try{
sock=new Socket(getCodeBase().getHost(),port);
is=new BufferedReader(new InputStreamReader(sock.getInputStream()));
pw=new PrintWriter(sock.getOutputStream(),true);
}catch(IOException e){
showStatus("Can't get socket: "+e);
cp.add(new Label("Can't get socket: "+e));
return;}
//构造并且启动读入器,从服务器读取数据,输出到文本框中
//这里,长成一个线程来避免锁住资源(lockups)
new Thread (new Runnable(){
public void run(){
String line;
try{
while(loggedIn &&((line=is.readLine())!=null))
ta.appendText(line+"\n");
}catch(IOException e){
showStatus("我的天啊,掉线了也!!!!");
return;
}
}
}).start();
//假定登录(其实只是打印相关信息,并没有真正登录)
// pw.println(Chat.CMD_LOGIN+"AppletUser");
pw.println(Chat.CMD_LOGIN+"AppletUser");
loggedIn =true;

}
//模仿退出的代码
public void logout(){
if(!loggedIn)
return;
loggedIn=false;
try{
if(sock!=null)
sock.close();
}catch(IOException ign){
// 异常处理哦
}
}
//没有设置stop的方法,即使从浏览器跳到另外一个网页的时候
//聊天程序还可以继续运行
public void paint(Graphics g){
Dimension d=getSize();
int h=d.height;
int w=d.width;
g.fillRect(0,0,w,2);
g.setColor(Color.black);
g.drawString(paintMessage,10,(h/2)-5);
}
}

聊天室服务器端
import java.net.*;
import java.io.*;
import java.util.*;

public class ChatServer{
//聊天室管理员ID
protected final static String CHATMASTER_ID="ChatMaster";
//系统信息的分隔符
protected final static String SEP=": ";
//服务器的Socket
protected ServerSocket servSock;
//当前客户端列表
protected ArrayList clients;
//调试标记
protected boolean DEBUG=false;
public ChatParameter Chat;

//主方法构造一个ChatServer,没有返回值
public static void main(String[] argv){
System.out.println("Chat server0.1 starting>>>>>>>>>>>>>>>>");
ChatServer w=new ChatServer();
w.runServer();
System.out.println("***ERROR*** Chat server0.1 quitting");

}

//构造和运行一个聊天服务
ChatServer(){
Chat=new ChatParameter();
clients=new ArrayList();
try{
servSock=new ServerSocket(7777);//实有问题拉,不过可能是他自己定义既一个class.
System.out.println("Chat Server0.1 listening on port:"+7777);
}catch(Exception e){
log("IO Exception in ChatServer.<init>");
System.exit(0);
}
}

public void runServer(){
try{
while(true){
Socket us=servSock.accept();
String hostName=us.getInetAddress().getHostName();
System.out.println("Accpeted from "+hostName);
//一个处理的线程
ChatHandler cl=new ChatHandler(us,hostName);
synchronized(clients){
clients.add(cl);
cl.start();
if(clients.size()==1)
cl.send(CHATMASTER_ID,"Welcome!You are the first one here");
else{
cl.send(CHATMASTER_ID,"Welcome!You are the latest of"+
clients.size()+" users.");
}
}
}
}catch(Exception e){
log("IO Exception in runServer:"+e);
System.exit(0);
}
}

protected void log(String s){
System.out.println(s);
}

//处理会话的内部的类
protected class ChatHandler extends Thread {
//客户端scoket
protected Socket clientSock;
//读取socket的BufferedReader
protected BufferedReader is ;
//在socket 上发送信息行的PrintWriter
protected PrintWriter pw;
//客户端出主机
protected String clientIP;
//句柄
protected String login;

public ChatHandler (Socket sock,String clnt)throws IOException {
clientSock=sock;
clientIP=clnt;
is=new BufferedReader(
new InputStreamReader(sock.getInputStream()));
pw=new PrintWriter (sock.getOutputStream(),true);

}

//每一个ChatHandler是一个线程,下面的是他的run()方法
//用于处理会话
public void run(){
String line;

try{
while((line=is.readLine())!=null){
char c=line.charAt(0);//我顶你老母啊 ,果只Chat.CMD咩xx冇定义 扑啊///!!!
line=line.substring(1);
switch(c){
//case Chat.CMD_LOGIN:
case 'l':
if(!Chat.isValidLoginName(line)){
send(CHATMASTER_ID,"LOGIN"+line+"invalid");
log("LOGIN INVALID from:"+clientIP);
continue;
}

login=line;
broadcast(CHATMASTER_ID,login+" joins us,for a total of"+
clients.size()+" users");
break;

// case Chat.CMD_MESG:
case 'm':
if(login==null){
send(CHATMASTER_ID,"please login first");
continue;
}

int where =line.indexOf(Chat.SEPARATOR);
String recip=line.substring(0,where);
String mesg=line.substring (where+1);
log("MESG: "+login+"--->"+recip+": "+mesg);
ChatHandler cl=lookup(recip);
if(cl==null)
psend(CHATMASTER_ID,recip+"not logged in.");
else
cl.psend(login,mesg);

break;

//case Chat.CMD_QUIT:
case 'q':
broadcast(CHATMASTER_ID,"Goodbye to "+login+"@"+clientIP);
close();
return;//ChatHandler结束

// case Chat.CMD_BCAST:
case 'b':
if(login!=null)
broadcast(login,line);
else
log("B<L FROM"+clientIP);
break;

default:
log("Unknow cmd"+c+"from"+login+"@"+clientIP);
}
}
}catch(IOException e){
log("IO Exception :"+e);
}finally{
//sock 结束,我们完成了
//还不能发送再见的消息
//得有简单的基于命令的协议才行
System.out.println(login+SEP+"All Done");
synchronized(clients){
clients.remove(this);
if(clients.size()==0){
System.out.println(CHATMASTER_ID+SEP+
"I'm so lonely I could cry>>>>>");
}else if(clients.size()==1){
ChatHandler last=(ChatHandler)clients.get(0);
last.send(CHATMASTER_ID,"Hey,you are talking to yourself again");
}
else{
broadcast(CHATMASTER_ID,"There are now"+clients.size()+" users");
}
}
}
}
protected void close(){
if(clientSock==null){
log("close when not open");
return;
}
try{
clientSock.close();
clientSock=null;
}catch(IOException e){
log("Failure ring close to "+clientIP);
}
}
//发送一条消息给用户
public void send(String sender,String mesg){
pw.println(sender+SEP+"*>"+mesg);
}
//发送私有的消息
protected void psend(String sender ,String msg){
send("<*"+sender+"*>",msg);
}
//发送一条消息给所有的用户
public void broadcast (String sender,String mesg){
System.out.println("Broadcasting"+sender+SEP+mesg);
for(int i=0;i<clients.size();i++){
ChatHandler sib=(ChatHandler)clients.get(i);
if(DEBUG)
System.out.println("Sending to"+sib);
sib.send(sender,mesg);
}
if(DEBUG) System.out.println("Done broadcast");
}
protected ChatHandler lookup(String nick){
synchronized(clients){
for(int i=0;i<clients.size();i++){
ChatHandler cl=(ChatHandler)clients.get(i);
if(cl.login.equals(nick))
return cl;
}
}
return null;
}
//将ChatHandler对象转换成一个字符串
public String toString(){
return "ChatHandler["+login+"]";
}
}
}

public class ChatParameter {
public static final char CMD_BCAST='b';
public static final char CMD_LOGIN='l';
public static final char CMD_MESG='m';
public static final char CMD_QUIT='q';
public static final char SEPARATOR=':';//?????
public static final int PORTNUM=7777;
public boolean isValidLoginName(String line){
if (line.equals("CHATMASTER_ID"))
return false;
return true;
}
public void main(String[] argv){
}
}

以上代码由于界面限制的原因 可能有点儿乱
把它整个复制出去 重新整理修改一下就行了