java套接字聊天代码 JAVA套接字

在一个java网络套接字信息功能问题,怎么解决

可以参考一下这段代码 //1. 构造ServerSocket实例,指定服务端口。ServerSocket servSock = new ServerSocket(servPort); while(true){ // 2.调用accept方法,建立和客户端的连接 Socket clntSock = servSock.accept(); SocketAddress clientAddress = clntSock.getRemoteSocketAddress(); System.out.println("Handling client at " + clientAddress); // 3. 获取连接的InputStream,OutputStream来进行数据读写 InputStream in = clntSock.getInputStream(); OutputStream out = clntSock.getOutputStream(); while((recvMsgSize = in.read(receiveBuf)) != -1) { out.write(receiveBuf, 0, recvMsgSize); } // 4.操作结束,关闭socket. clntSock.close();}

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求java网络聊天室(B/S模式)程序代码

共四个java文件,源代码如下:

import java.awt.*;

import java.net.*;

import java.awt.event.*;

import java.io.*;

import java.util.Hashtable;

public class ChatArea extends Panel implements ActionListener,Runnable

{

Socket socket=null;

DataInputStream in=null;

DataOutputStream out=null;

Thread threadMessage=null;

TextArea 谈话显示区,私聊显示区=null;

TextField 送出信息=null;

Button 确定,刷新谈话区,刷新私聊区;

Label 提示条=null;

String name=null;

Hashtable listTable;

List listComponent=null;

Choice privateChatList;

int width,height;

public ChatArea(String name,Hashtable listTable,int width,int height)

{

setLayout(null);

setBackground(Color.orange);

this.width=width;

this.height=height;

setSize(width,height);

this.listTable=listTable;

this.name=name;

threadMessage=new Thread(this);

谈话显示区=new TextArea(10,10);

私聊显示区=new TextArea(10,10);

确定=new Button("送出信息到:");

刷新谈话区=new Button("刷新谈话区");

刷新私聊区=new Button("刷新私聊区");

提示条=new Label("双击聊天者可私聊",Label.CENTER);

送出信息=new TextField(28);

确定.addActionListener(this);

送出信息.addActionListener(this);

刷新谈话区.addActionListener(this);

刷新私聊区.addActionListener(this);

listComponent=new List();

listComponent.addActionListener(this);

privateChatList=new Choice();

privateChatList.add("大家(*)");

privateChatList.select(0);

add(谈话显示区);

谈话显示区.setBounds(10,10,(width-120)/2,(height-120));

add(私聊显示区);

私聊显示区.setBounds(10+(width-120)/2,10,(width-120)/2,(height-120));

add(listComponent);

listComponent.setBounds(10+(width-120),10,100,(height-160));

add(提示条);

提示条.setBounds(10+(width-120),10+(height-160),110,40);

Panel pSouth=new Panel();

pSouth.add(送出信息);

pSouth.add(确定);

pSouth.add(privateChatList);

pSouth.add(刷新谈话区);

pSouth.add(刷新私聊区);

add(pSouth);

pSouth.setBounds(10,20+(height-120),width-20,60);

}

public void setName(String s)

{

name=s;

}

public void setSocketConnection(Socket socket,DataInputStream in,DataOutputStream out)

{

this.socket=socket;

this.in=in;

this.out=out;

try

{

threadMessage.start();

}

catch(Exception e)

{

}

}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==确定||e.getSource()==送出信息)

{

String message="";

String people=privateChatList.getSelectedItem();

people=people.substring(0,people.indexOf("("));

message=送出信息.getText();

if(message.length()0)

{

try {

if(people.equals("大家"))

{

out.writeUTF("公共聊天内容:"+name+"说:"+message);

}

else

{

out.writeUTF("私人聊天内容:"+name+"悄悄地说:"+message+"#"+people);

}

}

catch(IOException event)

{

}

}

}

else if(e.getSource()==listComponent)

{

privateChatList.insert(listComponent.getSelectedItem(),0);

privateChatList.repaint();

}

else if(e.getSource()==刷新谈话区)

{

谈话显示区.setText(null);

}

else if(e.getSource()==刷新私聊区)

{

私聊显示区.setText(null);

}

}

public void run()

{

while(true)

{

String s=null;

try

{

s=in.readUTF();

if(s.startsWith("聊天内容:"))

{

String content=s.substring(s.indexOf(":")+1);

谈话显示区.append("\n"+content);

}

if(s.startsWith("私人聊天内容:"))

{

String content=s.substring(s.indexOf(":")+1);

私聊显示区.append("\n"+content);

}

else if(s.startsWith("聊天者:"))

{

String people=s.substring(s.indexOf(":")+1,s.indexOf("性别"));

String sex=s.substring(s.indexOf("性别")+2);

listTable.put(people,people+"("+sex+")");

listComponent.add((String)listTable.get(people));

listComponent.repaint();

}

else if(s.startsWith("用户离线:"))

{

String awayPeopleName=s.substring(s.indexOf(":")+1);

listComponent.remove((String)listTable.get(awayPeopleName));

listComponent.repaint();

谈话显示区.append("\n"+(String)listTable.get(awayPeopleName)+"离线");

listTable.remove(awayPeopleName);

}

Thread.sleep(5);

}

catch(IOException e)

{

listComponent.removeAll();

listComponent.repaint();

listTable.clear();

谈话显示区.setText("和服务器的连接已中断\n必须刷新浏览器才能再次聊天");

break;

}

catch(InterruptedException e)

{

}

}

}

}

ChatServer.java

import java.io.*;

import java.net.*;

import java.util.*;

public class ChatServer

{

public static void main(String args[])

{

ServerSocket server=null;

Socket you=null;

Hashtable peopleList;

peopleList=new Hashtable();

while(true)

{

try

{

server=new ServerSocket(6666);

}

catch(IOException e1)

{

System.out.println("正在监听");

}

try {

you=server.accept();

InetAddress address=you.getInetAddress();

System.out.println("用户的IP:"+address);

}

catch (IOException e)

{

}

if(you!=null)

{

Server_thread peopleThread=new Server_thread(you,peopleList);

peopleThread.start();

}

else {

continue;

}

}

}

}

class Server_thread extends Thread

{

String name=null,sex=null;

Socket socket=null;

File file=null;

DataOutputStream out=null;

DataInputStream in=null;

Hashtable peopleList=null;

Server_thread(Socket t,Hashtable list)

{

peopleList=list;

socket=t;

try {

in=new DataInputStream(socket.getInputStream());

out=new DataOutputStream(socket.getOutputStream());

}

catch (IOException e)

{

}

}

public void run()

{

while(true)

{ String s=null;

try

{

s=in.readUTF();

if(s.startsWith("姓名:"))

{

name=s.substring(s.indexOf(":")+1,s.indexOf("性别"));

sex=s.substring(s.lastIndexOf(":")+1);

boolean boo=peopleList.containsKey(name);

if(boo==false)

{

peopleList.put(name,this);

out.writeUTF("可以聊天:");

Enumeration enum=peopleList.elements();

while(enum.hasMoreElements())

{

Server_thread th=(Server_thread)enum.nextElement();

th.out.writeUTF("聊天者:"+name+"性别"+sex);

if(th!=this)

{

out.writeUTF("聊天者:"+th.name+"性别"+th.sex);

}

}

}

else

{

out.writeUTF("不可以聊天:");

}

}

else if(s.startsWith("公共聊天内容:"))

{

String message=s.substring(s.indexOf(":")+1);

Enumeration enum=peopleList.elements();

while(enum.hasMoreElements())

{

((Server_thread)enum.nextElement()).out.writeUTF("聊天内容:"+message);

}

}

else if(s.startsWith("用户离开:"))

{

Enumeration enum=peopleList.elements();

while(enum.hasMoreElements())

{ try

{

Server_thread th=(Server_thread)enum.nextElement();

if(th!=thisth.isAlive())

{

th.out.writeUTF("用户离线:"+name);

}

}

catch(IOException eee)

{

}

}

peopleList.remove(name);

socket.close();

System.out.println(name+"用户离开了");

break;

}

else if(s.startsWith("私人聊天内容:"))

{

String 悄悄话=s.substring(s.indexOf(":")+1,s.indexOf("#"));

String toPeople=s.substring(s.indexOf("#")+1);

Server_thread toThread=(Server_thread)peopleList.get(toPeople);

if(toThread!=null)

{

toThread.out.writeUTF("私人聊天内容:"+悄悄话);

}

else

{

out.writeUTF("私人聊天内容:"+toPeople+"已经离线");

}

}

}

catch(IOException ee)

{

Enumeration enum=peopleList.elements();

while(enum.hasMoreElements())

{ try

{

Server_thread th=(Server_thread)enum.nextElement();

if(th!=thisth.isAlive())

{

th.out.writeUTF("用户离线:"+name);

}

}

catch(IOException eee)

{

}

}

peopleList.remove(name);

try

{

socket.close();

}

catch(IOException eee)

{

}

System.out.println(name+"用户离开了");

break;

}

}

}

}

import java.awt.*;

import java.io.*;

import java.net.*;

import java.applet.*;

import java.util.Hashtable;

ClientChat.java

public class ClientChat extends Applet implements Runnable

{

Socket socket=null;

DataInputStream in=null;

DataOutputStream out=null;

InputNameTextField 用户提交昵称界面=null;

ChatArea 用户聊天界面=null;

Hashtable listTable;

Label 提示条;

Panel north, center;

Thread thread;

public void init()

{

int width=getSize().width;

int height=getSize().height;

listTable=new Hashtable();

setLayout(new BorderLayout());

用户提交昵称界面=new InputNameTextField(listTable);

int h=用户提交昵称界面.getSize().height;

用户聊天界面=new ChatArea("",listTable,width,height-(h+5));

用户聊天界面.setVisible(false);

提示条=new Label("正在连接到服务器,请稍等...",Label.CENTER);

提示条.setForeground(Color.red);

north=new Panel(new FlowLayout(FlowLayout.LEFT));

center=new Panel();

north.add(用户提交昵称界面);

north.add(提示条);

center.add(用户聊天界面);

add(north,BorderLayout.NORTH);

add(center,BorderLayout.CENTER);

validate();

}

public void start()

{

if(socket!=nullin!=nullout!=null)

{ try

{

socket.close();

in.close();

out.close();

用户聊天界面.setVisible(false);

}

catch(Exception ee)

{

}

}

try

{

socket = new Socket(this.getCodeBase().getHost(), 6666);

in=new DataInputStream(socket.getInputStream());

out=new DataOutputStream(socket.getOutputStream());

}

catch (IOException ee)

{

提示条.setText("连接失败");

}

if(socket!=null)

{

InetAddress address=socket.getInetAddress();

提示条.setText("连接:"+address+"成功");

用户提交昵称界面.setSocketConnection(socket,in,out);

north.validate();

}

if(thread==null)

{

thread=new Thread(this);

thread.start();

}

}

public void stop()

{

try

{

socket.close();

thread=null;

}

catch(IOException e)

{

this.showStatus(e.toString());

}

}

public void run()

{

while(thread!=null)

{

if(用户提交昵称界面.get能否聊天()==true)

{

用户聊天界面.setVisible(true);

用户聊天界面.setName(用户提交昵称界面.getName());

用户聊天界面.setSocketConnection(socket,in,out);

提示条.setText("祝聊天愉快!");

center.validate();

break;

}

try

{

Thread.sleep(100);

}

catch(Exception e)

{

}

}

}

}

InputNameTextField。java

import java.awt.*;

import java.net.*;

import java.awt.event.*;

import java.io.*;

import java.util.Hashtable;

public class InputNameTextField extends Panel implements ActionListener,Runnable

{

TextField nameFile=null;

String name=null;

Checkbox male=null,female=null;

CheckboxGroup group=null;

Button 进入聊天室=null,退出聊天室=null;

Socket socket=null;

DataInputStream in=null;

DataOutputStream out=null;

Thread thread=null;

boolean 能否聊天=false;

Hashtable listTable;

public InputNameTextField(Hashtable listTable)

{

this.listTable=listTable;

nameFile=new TextField(10);

group=new CheckboxGroup();

male=new Checkbox("男",true,group);

female=new Checkbox("女",false,group);

进入聊天室=new Button("进入");

退出聊天室=new Button("退出");

进入聊天室.addActionListener(this);

退出聊天室.addActionListener(this);

thread=new Thread(this);

add(new Label("昵称:"));

add(nameFile);

add(male);

add(female);

add(进入聊天室);

add(退出聊天室);

退出聊天室.setEnabled(false);

}

public void set能否聊天(boolean b)

{

能否聊天=b;

}

public boolean get能否聊天()

{

return 能否聊天;

}

public String getName()

{

return name;

}

public void setName(String s)

{

name=s;

}

public void setSocketConnection(Socket socket,DataInputStream in,DataOutputStream out)

{

this.socket=socket;

this.in=in;

this.out=out;

try{

thread.start();

}

catch(Exception e)

{

nameFile.setText(""+e);

}

}

public Socket getSocket()

{

return socket;

}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==进入聊天室)

{

退出聊天室.setEnabled(true);

if(能否聊天==true)

{

nameFile.setText("您正在聊天:"+name);

}

else

{

this.setName(nameFile.getText());

String sex=group.getSelectedCheckbox().getLabel();

if(socket!=nullname!=null)

{

try{

out.writeUTF("姓名:"+name+"性别:"+sex);

}

catch(IOException ee)

{

nameFile.setText("没有连通服务器"+ee);

}

}

}

}

if(e.getSource()==退出聊天室)

{

try

{

out.writeUTF("用户离开:");

}

catch(IOException ee)

{

}

}

}

public void run()

{

String message=null;

while(true)

{

if(in!=null)

{

try

{

message=in.readUTF();

}

catch(IOException e)

{

nameFile.setText("和服务器断开"+e);

}

}

if(message.startsWith("可以聊天:"))

{

能否聊天=true;

break;

}

else if(message.startsWith("聊天者:"))

{

String people=message.substring(message.indexOf(":")+1);

listTable.put(people,people);

}

else if(message.startsWith("不可以聊天:"))

{

能否聊天=false;

nameFile.setText("该昵称已被占用");

}

}

}

}

求一个用java编写的套接字实现类似于QQ对话的程序,急用

有两个类,服务器和客户端、

服务器类代码:

package chat;

import java.io.*;

import java.net.*;

import java.util.*;

/*服务器类*/

public class Server {

public ListSocket socketList = new ArrayListSocket();//存放所有连接的客户端的集合

public ServerSocket server;//服务器

public int portNum;//端口号

public Server(int portNum){

this.portNum = portNum;

}

public void innit(){

try {

server = new ServerSocket(portNum);

System.out.println("服务器开启成功!");

int socketNum = 0;

while(true){

Socket socket = server.accept();//被动等待客户端的连接

socketNum++;

System.out.println("第"+socketNum+"个客户端连接成功!!");

socketList.add(socket);//连接的客户端存放到集合里面

new RWThread(socket).start();

}

} catch (IOException e) {

e.printStackTrace();

}

}

class RWThread extends Thread{//接收和发送消息的线程

public Socket socket;

public RWThread(Socket socket){

this.socket = socket;

}

public void run() {

super.run();

try {

BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));

while(true){

String message = br.readLine();

System.out.println(message);//接收客户端发来的消息

for(int i=0;isocketList.size();i++){//发送给所有连接的客户端

PrintWriter pw = new PrintWriter(new OutputStreamWriter(socketList.get(i).getOutputStream()));

pw.println(message);

pw.flush();

}

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

public static void main(String[] args) {

int portNum = 8888;//创建服务器的端口号

Server server = new Server(portNum);

server.innit();

}

}

客户端类:

package chat;

import java.io.*;

import java.net.*;

import java.util.*;

/*客户端类*/

public class Client {

public Socket socket;

public Client(){

Scanner sca = new Scanner(System.in);

try {

socket = new Socket("127.0.0.1",8888);//创建客户端

new ReadThread(socket).start();//开启读取从服务器端发来的信息

while(true){

PrintWriter pw = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()));

String message = sca.nextLine();

pw.println(message);//向服务器发送信息

pw.flush();

}

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

System.out.println("错误:服务器未开启!!!");

}

}

class ReadThread extends Thread{//读取服务器发来信息的线程

public Socket socket;

public ReadThread(Socket socket){

this.socket = socket;

}

public void run() {

super.run();

try {

BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));

while(true){

String message = br.readLine();

System.out.println(message);//输出信息

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

public static void main(String[] args) {

Client client = new Client();

}

}

现打开服务器类,然后可以打开多个客户端进行聊天

java 套接字 怎么发送数 少报错

Socket Socket=ServerSocket.accept();

System.out.println("IP地址"+Socket.getInetAddress()+"端口"+Socket.getPort()+"已经连接到本机");

BufferedReader read = new BufferedReader(new InputStreamReader(Socket.getInputStream(),"UTF-8"));

PrintWriter pw =new PrintWriter(Socket.getOutputStream(),true);

拿到while循环外面,这样服务器端只为第一个连接的客服端服务,程序会正常。或者将Socket=ServerSocket.accept();返回的sock交给宁一个线程处理,然后循环调用String st=read.readLine();读取数据,这样就是一个比较标准的服务器端了,为每一个连进来的客服端,开一个单独的线程为之服务。

主要要理解Socket=ServerSocket.accept();这句代码,返回的Socket是针对单独的一个客户端的,当没有客户端连接时,这句代码会阻塞,直到有客户端连接进来生成的与之对应的客户端。

现在报错是因为,与客户端相对应Socket,读了一行数据,就销毁了,然后又循环到Socket=ServerSocket.accept();去等待一个新的连接。而客户端还往已经销毁的socket发数据,当然客户端会抛Connection reset。

java聊天程序套接字错误求高手

我已前碰到过.

这个是说端口已使用.Address already in use:JVM_Bind.

通常是先确认一下有没有其他的软件使用这个端口,如果是自己开发的Socket,通常不会这么巧的.

如果没有其他软件占用的话,就是另一个很常见的情况.就是说Socket程序中的socket每次在结束关闭之后的几秒或几十秒内通常是还没有关闭的.这是因为如果Socket立刻关闭,而碰巧又有其他的软件马上使用了这个端口时,就会接收到原本应该由前面socket接收的数据.这就是不允许的数据.所以socket被关闭以后,还是会在后台将客户发过来的数据接收完才真正关闭.

版主所说,可能是在关闭程序以后,马上又再运行此程序,导致出现了端口冲突.

对于此种问题,是JAVA语言的一种高级特性,可能没办法改.最好是刷新一下,并稍等片刻再重新运行.


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