Java 简易版 TCP UDP聊天
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 block
e1.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 block
e1.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 block
e1.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 block
e1.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 socketList=new ArrayList();
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 clients;
ServerBO_Thread(Socket s,ArrayList 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ip
public 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结果：
