客户端
import java.io.*;
import java.net.Socket;
import java.util.Date;
import javax.swing.*;public class MyClient {private JFrame jf;private JButton jBsend;private JTextArea jTAcontent;private JTextField jText;private JLabel JLcontent;private Date data;private JPanel jPanel;JScrollPane scroll;MyClient(){jf=new JFrame("客户端");jBsend =new JButton("发送");jTAcontent =new JTextArea(13,40);jText =new JTextField(12);scroll=new JScrollPane(jTAcontent,JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); //文本区添加竖直滑动条JLcontent=new JLabel("聊天记录");jPanel=new JPanel();}public void Win(){Box boxVBox=Box.createVerticalBox();boxVBox.add(JLcontent);boxVBox.add(Box.createVerticalStrut(5));boxVBox.add(scroll);boxVBox.add(Box.createVerticalStrut(10));boxVBox.add(jText);boxVBox.add(Box.createVerticalStrut(10));boxVBox.add(jBsend);boxVBox.add(Box.createVerticalStrut(10));jPanel.add(boxVBox);jf.add(jPanel);jf.setSize(600, 400);jf.setResizable(false);jf.setLocationRelativeTo(null);jf.setVisible(true);jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}public void Connect() throws Exception{Socket sk= new Socket("127.0.0.1",1200);jBsend.addActionListener(e->{ //Lambda表达式实现点击按钮发送信息 String str=jText.getText(); //获取文本框内容if (str.matches("\\s+") || str.equals("")) {JOptionPane.showMessageDialog(jf, "不可发送空白内容");return;}try {jTAcontent.append("我:"+str+"\n"); //文本区添加文本框内容BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(sk.getOutputStream())); //字符流发送信息bw.write(str); //发送文本框的信息给对方bw.newLine(); //发送后换行bw.flush(); //立即发送//不用bw.close(),为了可以一直发送信息jText.setText("");} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}new Thread(()->{ //Lambda表达式创建线程while(true){ //死循环随时接受信息try {BufferedReader br=new BufferedReader(new InputStreamReader(sk.getInputStream())); //以字符流接受信息String read = br.readLine(); //一行一行接受信息jTAcontent.append("客服:"+read+"\n");} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}}).start(); //开启线程});}public static void main(String[] args) throws Exception {MyClient client=new MyClient();client.Win();client.Connect();}
}
服务端
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import javax.swing.*;public class MyServer {//以下是聊天窗口的实现,上一篇文章有说过,不必多说private JFrame jf;private JButton jBsend;private JTextArea jTAcontent;private JTextField jText;private JLabel JLcontent;private Date data;private JPanel jPanel;private JScrollPane scroll;MyServer() { jf = new JFrame("服务端");jBsend = new JButton("发送");jTAcontent = new JTextArea(13, 40);jText = new JTextField(12);scroll = new JScrollPane(jTAcontent, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); //文本区添加竖直滑动条JLcontent = new JLabel("聊天记录");jPanel = new JPanel();}public void Win() {Box boxVBox = Box.createVerticalBox(); //这里应用了垂直盒式布局模式排列组件boxVBox.add(JLcontent);boxVBox.add(Box.createVerticalStrut(5));boxVBox.add(scroll);boxVBox.add(Box.createVerticalStrut(10));boxVBox.add(jText);boxVBox.add(Box.createVerticalStrut(10));boxVBox.add(jBsend);boxVBox.add(Box.createVerticalStrut(10));jPanel.add(boxVBox);jf.add(jPanel);jf.setSize(600, 400);jf.setResizable(false);jf.setLocationRelativeTo(null);jf.setVisible(true);jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}public void Connect() throws Exception {ServerSocket ss = new ServerSocket(1200);while (true) {Socket sk = ss.accept();jBsend.addActionListener(e -> { //按钮响应事件,实现点击按钮发送信息String str = jText.getText(); //获取文本框的内容try {jTAcontent.append("我:" + str + "\n");BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(sk.getOutputStream())); //以字符流发送信息bw.write(str); //将文本框内容发送给对方bw.newLine(); //发送后换行bw.flush(); //立即发送//不用bw.close(),为了可以一直发送信息} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}jText.setText("");});new Thread(() -> { //开启线程,这里是为了服务端可同时接收到多个客户端信息while (true) { //设置死循环,用于随时接受信息try {BufferedReader br = new BufferedReader(new InputStreamReader(sk.getInputStream())); //字符流方式接受信息String read = br.readLine(); //以字符串方式一行一行接受到信息jTAcontent.append("客户:" + read + "\n"); //将接收的信息写入文本区} catch (IOException e1) {// TODO Auto-generated catch blocke1.printStackTrace();}}}).start(); //用start开启线程}}public static void main(String[] args) throws Exception {MyServer server = new MyServer();server.Win();server.Connect();}
}
结果:
UDP 多人聊天室
服务端
import java.io.*;
import java.net.*;
import java.util.ArrayList;
public class Server{public static ServerSocket server_socket;public static ArrayList<Socket> socketList=new ArrayList<Socket>(); public static void main(String []args){try{server_socket = new ServerSocket(5000);while(true){Socket socket = server_socket.accept();socketList.add(socket); //把sock对象加入sock集合ServerBO_Thread st=new ServerBO_Thread(socket,socketList); //初始化多线程st.start();//启动多线程}}catch(Exception ex){ex.printStackTrace();}finally{try{if(server_socket!=null){server_socket.close();}}catch(Exception ex){ex.printStackTrace();}}}public void encryptWrite(String src,DataOutputStream output)throws IOException{//将一个字符串转化为字符数组//System.out.println(src);char[] char_arr = src.toCharArray();//加密操作for(int i = 0;i<char_arr.length;i++){output.writeChar(char_arr[i]+13);}//用作结束标志符output.writeChar(2333);output.flush();}//读取并解密public String readDecrypt(DataInputStream input)throws IOException{String rtn="";while(true){int char_src =input.readChar();if(char_src!=2333){rtn=rtn+(char)(char_src-13);}else{break;}}return rtn;}
}
class ServerBO_Thread extends Thread{Socket client = null;ArrayList<Socket> clients;ServerBO_Thread(Socket s,ArrayList<Socket> ss){//初始化client=s;clients=ss; }public void run(){DataInputStream input = null;DataOutputStream output =null;try{input = new DataInputStream(client.getInputStream());Server bo = new Server();String receive=null;String send=null;while(true){//监视当前客户端有没有发来消息if(!client.isClosed()){receive=bo.readDecrypt(input);clients.trimToSize();String[] param = receive.split("&");if(")start".equals(param[1])){ //分析客户端发来的内容send = param[0]+"进入聊天室";}else{send = param[0]+"说: "+param[1];}if(!("3333".equals(param[1]))){//3333为退出聊天室信号for(Socket socket:clients){ //遍历socke集合 //把读取到的消息发送给各个客户端 if(!socket.isClosed()){output = new DataOutputStream(socket.getOutputStream());bo.encryptWrite(send,output);}} }else{//如果有客户端退出for(Socket socket:clients){ //遍历socke集合 if(socket!=client){//告诉其他人此人退出聊天室if(!(socket.isClosed())){output = new DataOutputStream(socket.getOutputStream());bo.encryptWrite(param[0]+"已退出聊天室",output);}}}output = new DataOutputStream(client.getOutputStream());bo.encryptWrite("3333",output);//返回信号给要退出的客户端,然后关闭线程client.close();input.close();output.close();}}else{break;}}}catch(Exception ex){ex.printStackTrace();}}
}
客户端
import java.io.IOException;
import java.util.Scanner;
import java.net.*;
import java.io.*;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.BufferedWriter;
import java.io.BufferedReader;
import java.io.DataOutputStream;
public class People{
//服务端ippublic String ip = "127.0.0.1";//服务端端口public int port = 5000;public DataOutputStream output = null;public Socket socket = null;public DataInputStream input = null;public Scanner sc =new Scanner (System.in);public String send ;public String receive;public String name;public String sd = null;public static void main(String[]aa){People po = new People();po.start();}public void start(){try{System.out.println("*******欢迎使用匿名聊天室!**********");System.out.println("请输入你将要使用的昵称:");name=sc.nextLine();//获取昵称socket = new Socket(ip,port);output=new DataOutputStream(socket.getOutputStream());input = new DataInputStream(socket.getInputStream());send = name+"&)start";//把昵称发送到server 告诉所有人有新成员加入聊天室System.out.println("(如果要退出聊天室请输入“3333”!)");System.out.println("*******成功进入匿名聊天室!**********");System.out.println("");encryptWrite(send,output);Out out=new Out(output,name,input,socket);out.start();//启动发送聊天内容的多线程while(true){ String receive = readDecrypt(input);if("3333".equals(receive)){//如果收到“3333”则退出聊天室System.out.println("*******成功退出匿名聊天室!**********");input.close();output.close();socket.close();System.exit(0);}System.out.println(receive);}}catch(Exception ex){ex.printStackTrace();}finally{try{if(socket!=null) socket.close();input.close();output.close();}catch(Exception ex){ex.printStackTrace();}} }public void encryptWrite(String src,DataOutputStream output)throws IOException{//将一个字符串转化为字符数组char[] char_arr = src.toCharArray();//加密操作for(int i = 0;i<char_arr.length;i++){output.writeChar(char_arr[i]+13);}//用作结束标志符output.writeChar(2333);output.flush();}//读取并解密public String readDecrypt(DataInputStream input)throws IOException{String rtn="";while(true){int char_src =input.readChar();if(char_src!=2333){rtn=rtn+(char)(char_src-13);}else{break;}}return rtn;}
}
class Out extends Thread {public DataOutputStream output;public DataInputStream input;public static String name;public Socket socket;public Scanner sc =new Scanner (System.in);Out(DataOutputStream ot,String n,DataInputStream it,Socket socket){output=ot;input=it;name=n;}public void run(){People po = new People();try{while(true){String send=sc.nextLine();//获取用户输入String send2=name+"&"+send;//把聊天内容打包成约定形式po.encryptWrite(send2,output);}}catch(Exception ex){ex.printStackTrace();}finally{System.out.println("sfef");}}
}
结果: