TCP
package Basic.src.com.IPDemo.TCPDemo.Demo01;import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;public class Client {public static void main(String[] args) throws Exception {//1.创建一个socket对象，并同时请求与服务端程序连接Socket socket = new Socket("127.0.0.1", 8888);//socket管道//2.从socket通信管道中得到一个字节输出流，用来发数据给服务端程序OutputStream os = socket.getOutputStream();//3.把低级的字节输出流包装成数据输出流DataOutputStream dos = new DataOutputStream(os);//4.开始写数据出去dos.writeUTF("在一起，好吗？");dos.close();//关闭外部包装流会同时关闭内部的流//5.关闭管道，释放资源socket.close();}
}
package Basic.src.com.IPDemo.TCPDemo.Demo01;import java.io.DataInputStream;
import java.io.InputStream;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import java.net.Socket;public class Server {public static void main(String[] args) throws Exception {System.out.println("=============服务端已开启============");//1.创建ServerSocket对象，同时为服务端注册端口ServerSocket serverSocket = new ServerSocket(8888);//2.使用ServerSocket对象，调用一个accept方法，等待客户端的连接请求Socket socket = serverSocket.accept();//启动后在此阻塞等待//3.从socket通信管道中获得一个字节输入流InputStream is = socket.getInputStream();//4.把原始低级的字节输入流包装成数据输入流DataInputStream dis = new DataInputStream(is);//5.使用数据输入流读取客户端数据String rs = dis.readUTF();//第二次阻塞等待System.out.println(rs);//其实我们也可以获取客户端的ip地址System.out.println(socket.getRemoteSocketAddress());dis.close();socket.close();//serverSocket.close();}
}
多发多收
package Basic.src.com.IPDemo.TCPDemo.Demo02;import java.io.DataOutputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Scanner;public class Client {public static void main(String[] args) throws Exception {//1.创建一个socket对象，并同时请求与服务端程序连接Socket socket = new Socket("127.0.0.1", 8888);//socket管道//2.从socket通信管道中得到一个字节输出流，用来发数据给服务端程序OutputStream os = socket.getOutputStream();//3.把低级的字节输出流包装成数据输出流DataOutputStream dos = new DataOutputStream(os);//让用户输入消息Scanner sc = new Scanner(System.in);while (true) {System.out.println("请说：");String msg = sc.nextLine();//一旦用户输入了"exit"，就退出客户端程序if (msg.equals("exit")) {System.out.println("欢迎您下次光临，退出成功！");dos.close();socket.close();break;}//4.开始写数据出去dos.writeUTF(msg);dos.flush();//刷新出去，防止数据还在客户端的内存中：立即发生给服务端}
// dos.close();//关闭外部包装流会同时关闭内部的流
//
// //5.关闭管道，释放资源
// socket.close();}
}
package Basic.src.com.IPDemo.TCPDemo.Demo02;import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;public class Server {public static void main(String[] args) throws Exception {System.out.println("=============服务端已开启============");//1.创建ServerSocket对象，同时为服务端注册端口ServerSocket serverSocket = new ServerSocket(8888);//2.使用ServerSocket对象，调用一个accept方法，等待客户端的连接请求Socket socket = serverSocket.accept();//启动后在此阻塞等待//3.从socket通信管道中获得一个字节输入流InputStream is = socket.getInputStream();//4.把原始低级的字节输入流包装成数据输入流DataInputStream dis = new DataInputStream(is);while (true) {try {//5.使用数据输入流读取客户端数据String rs = dis.readUTF();//第二次阻塞等待System.out.println(rs);//其实我们也可以获取客户端的ip地址System.out.println(socket.getRemoteSocketAddress());} catch (IOException e) {System.out.println(socket.getRemoteSocketAddress()+"离线了");dis.close();socket.close();break;}}// dis.close();
// socket.close();//serverSocket.close();}
}
多客户端通信：引入多线程
package Basic.src.com.IPDemo.TCPDemo.Demo03;import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Scanner;public class Client {public static void main(String[] args) throws Exception {//1.创建一个socket对象，并同时请求与服务端程序连接Socket socket = new Socket("127.0.0.1", 8888);//socket管道//2.从socket通信管道中得到一个字节输出流，用来发数据给服务端程序OutputStream os = socket.getOutputStream();//3.把低级的字节输出流包装成数据输出流DataOutputStream dos = new DataOutputStream(os);//让用户输入消息Scanner sc = new Scanner(System.in);while (true) {System.out.println("请说：");String msg = sc.nextLine();//一旦用户输入了"exit"，就退出客户端程序if (msg.equals("exit")) {System.out.println("欢迎您下次光临，退出成功！");dos.close();socket.close();break;}//4.开始写数据出去dos.writeUTF(msg);dos.flush();//刷新出去，防止数据还在客户端的内存中：立即发生给服务端}}
}
多线程设置
package Basic.src.com.IPDemo.TCPDemo.Demo03;import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;public class ServerReaderThread1 extends Thread {private Socket socket;public ServerReaderThread1(Socket socket) {this.socket = socket;}@Overridepublic void run() {try {InputStream is = socket.getInputStream();DataInputStream dis = new DataInputStream(is);while (true) {String msg = null;try {msg = dis.readUTF();} catch (Exception e) {System.out.println("有人下线了："+socket.getRemoteSocketAddress());dis.close();socket.close();break;}System.out.println(msg);}} catch (IOException e) {e.printStackTrace();}}
}
即时通信
群聊
package Basic.src.com.IPDemo.TCPDemo.Demo04Forward;import java.io.DataOutputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Scanner;public class Client {public static void main(String[] args) throws Exception {//1.创建一个socket对象，并同时请求与服务端程序连接Socket socket = new Socket("127.0.0.1", 8888);//socket管道//TCP 的三次握手完成后，程序才会执行 Socket socket = new Socket("127.0.0.1", 8888); 之后的代码。//三次握手：//客户端发送 SYN 包（请求连接）；//服务端回复 SYN+ACK 包（同意连接）；//客户端回复 ACK 包（确认连接）。//创建一个独立线程，负责随机从socket中接收服务端发过来的信息new ClentReaderThread(socket).start();//2.从socket通信管道中得到一个字节输出流，用来发数据给服务端程序OutputStream os = socket.getOutputStream();//3.把低级的字节输出流包装成数据输出流DataOutputStream dos = new DataOutputStream(os);//让用户输入消息Scanner sc = new Scanner(System.in);while (true) {System.out.println("请说：");String msg = sc.nextLine();//一旦用户输入了"exit"，就退出客户端程序if (msg.equals("exit")) {System.out.println("欢迎您下次光临，退出成功！");dos.close();socket.close();break;}//4.开始写数据出去dos.writeUTF(msg);dos.flush();//刷新出去，防止数据还在客户端的内存中：立即发生给服务端}}
}
package Basic.src.com.IPDemo.TCPDemo.Demo04Forward;import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;public class ClentReaderThread extends Thread{private Socket socket;public ClentReaderThread(Socket socket){this.socket = socket;}@Overridepublic void run() {try {InputStream is = socket.getInputStream();DataInputStream dis = new DataInputStream(is);while (true) {//循环接收信号try {String msg = dis.readUTF();System.out.println(msg);//把这个消息分发给全部客户端接收，包括自己//sentMsgToAll(msg);} catch (Exception e) {System.out.println("自己下线了："+socket.getRemoteSocketAddress());//Server.onlinesockets.remove(socket);dis.close();socket.close();break;}}} catch (IOException e) {e.printStackTrace();}}
}
package Basic.src.com.IPDemo.TCPDemo.Demo04Forward;import Basic.src.com.IPDemo.TCPDemo.Demo03.ServerReaderThread;import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;public class Server {public static List<Socket> onlinesockets = new CopyOnWriteArrayList<Socket>();public static void main(String[] args) throws IOException {System.out.println("=============服务端已开启============");//1.创建ServerSocket对象，同时为服务端注册端口ServerSocket serverSocket = new ServerSocket(8888);//Socket socket = new Socket("127.0.0.1", 8888);while (true) {//循环启动线程//2.使用ServerSocket对象，调用一个accept方法，等待客户端的连接请求Socket socket = serverSocket.accept();//启动后在此阻塞等待//Socket socket = new ServerSocket(8888).accept();//启动后在此阻塞等待//追踪客户端上线onlinesockets.add(socket);//存入管道System.out.println("有人上线了"+socket.getRemoteSocketAddress());//3.把这个客户端对应的socket的通信管道交给一个独立的线程负责处理new ServerReadThreads(socket).start();}}
}
package Basic.src.com.IPDemo.TCPDemo.Demo04Forward;import java.io.*;
import java.net.Socket;public class ServerReadThreads extends Thread {private Socket socket;public ServerReadThreads(Socket socket) {this.socket = socket;}public void run() {System.out.println("转发程序启动："+socket.getRemoteSocketAddress());try {InputStream is = socket.getInputStream();DataInputStream dis = new DataInputStream(is);while (true) {//循环接收信号try {String msg = dis.readUTF();System.out.println(msg);//把这个消息分发给全部客户端接收，包括自己sentMsgToAll(msg);} catch (Exception e) {System.out.println("有人下线了："+socket.getRemoteSocketAddress());Server.onlinesockets.remove(socket);dis.close();socket.close();break;}}} catch (IOException e) {e.printStackTrace();}}private void sentMsgToAll(String msg) throws Exception{//发送给全部在线的socket接收for (Socket onlinesocket : Server.onlinesockets){System.out.println("开始转发消息，在线客户端数：" + Server.onlinesockets.size());OutputStream os = onlinesocket.getOutputStream();DataOutputStream dos = new DataOutputStream(os);dos.writeUTF(msg);dos.flush();}}
}
BS
http协议： http://服务器IP:服务器端口
比如：http://127.0.0.1:8080
package Basic.src.com.IPDemo.BSDemo;import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;public class Server {public static void main(String[] args) throws Exception {System.out.println("=============服务端已开启============");//1.创建ServerSocket对象，同时为服务端注册端口ServerSocket serverSocket = new ServerSocket(8080);while (true) {//2.使用ServerSocket对象，调用一个accept方法，等待客户端的连接请求Socket socket = serverSocket.accept();System.out.println("有人上线了："+socket.getRemoteSocketAddress());new ServerReaderThread(socket).start();}}
}
package Basic.src.com.IPDemo.BSDemo;import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.Socket;public class ServerReaderThread extends Thread{private Socket socket;public ServerReaderThread(Socket socket) {this.socket = socket;}@Overridepublic void run() {//立即响应一个网页内容：“黑马程序员”给浏览器展示OutputStream os = null;try {os = socket.getOutputStream();PrintStream ps = new PrintStream(os);ps.println("HTTP/1.1 200 OK");ps.println("Content-Type: text/html; charset=UTF-8");ps.println();ps.println("<div style='color:red;font-size:140px;text-align:center;font-family:Arial'>密码的666<div style");ps.close();ps.close();socket.close();//网页响应是短连接} catch (IOException e) {throw new RuntimeException(e);}}
}
package Basic.src.com.IPDemo.BSDemo;import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;public class Server {public static void main(String[] args) throws Exception {System.out.println("=============服务端已开启============");//1.创建ServerSocket对象，同时为服务端注册端口ServerSocket serverSocket = new ServerSocket(8080);while (true) {//2.使用ServerSocket对象，调用一个accept方法，等待客户端的连接请求Socket socket = serverSocket.accept();System.out.println("有人上线了："+socket.getRemoteSocketAddress());new ServerReaderThread(socket).start();}}
}
package Basic.src.com.IPDemo.BSDemo;import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.net.Socket;public class ServerReaderThread extends Thread{private Socket socket;public ServerReaderThread(Socket socket) {this.socket = socket;}@Overridepublic void run() {//立即响应一个网页内容：“黑马程序员”给浏览器展示OutputStream os = null;try {os = socket.getOutputStream();PrintStream ps = new PrintStream(os);ps.println("HTTP/1.1 200 OK");ps.println("Content-Type: text/html; charset=UTF-8");ps.println();ps.println("<div style='color:red;font-size:140px;text-align:center;font-family:Arial'>密码的666<div style");ps.close();ps.close();socket.close();//网页响应是短连接} catch (IOException e) {throw new RuntimeException(e);}}
}