java_多线程_socket通信_多个客户端发送,服务器响应

/**
 * 服务器端不断接受请求
 * 接受一个请求开启一段线程
 */
package 练习0927;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Sever {
	public static void main(String[] args) throws Exception {

		serverStart();

	}

	private static void serverStart() throws IOException {
		ServerSocket server = new ServerSocket(12345);
		System.out.println("服务器启动!");
		while (true) {
			final Socket socket = server.accept(); // 接受多次
			new Thread() {
				public void run() {
					try {
						BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
						PrintStream ps = new PrintStream(socket.getOutputStream());
						while (true) {
							String result = br.readLine();
							if ("下线".equals(result)) {
								System.out.println("服务器下线");
								socket.close();
							} else {
								ps.println("服务器收到了:");
								System.out.println(result);
								ps.flush();
							}

						}
					} catch (Exception e) {
						// TODO: handle exception
					}

				};
			}.start();
		}
	}

}

/**
 * 
 */
package 练习0927;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Scanner;

public class Client {

	public static void main(String[] args) throws Exception {

		Socket socket = new Socket("127.0.0.1", 12345);
		Scanner scanner = new Scanner(System.in);
		System.out.println("客户端启动!");
		BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
		PrintStream ps = new PrintStream(socket.getOutputStream());
		while (true) {
			String result = scanner.nextLine();
			if ("下线".equals(result)) {
				ps.println(result);
				ps.flush();
				System.out.println("客户端下线");
				socket.close();
			} else {
				ps.println(result);
				ps.flush();
				System.out.println(br.readLine());
			}

		}

	}

}

******************************************************************************************************************************************

老师的代码:

*******************************************************************************************************************************************

package com.neuedu.demo;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server implements Runnable {
	private Socket socket;
	public Server(Socket socket){
		this.socket=socket;
	}
	
	public static void main(String[] args) {
		try {
			ServerSocket server = new ServerSocket(8888);
			while (true) {
				Socket socket = server.accept();
				Server s=new Server(socket);
				//一个任务单元
				Thread thread=new Thread(s);
				thread.start();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	@Override
	public void run() {
		while(true){
			try {
				InputStream in=socket.getInputStream();
				DataInputStream dis=new DataInputStream(in);
				String str=dis.readUTF();
				
				OutputStream out=socket.getOutputStream();
				DataOutputStream dos=new DataOutputStream(out);
				dos.writeUTF(str);
				dos.flush();
				
				if(str.equals("bye")){
					in.close();
					out.close();
					socket.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}

package com.neuedu.demo;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Scanner;

public class Client {
	public static void main(String[] args) {
		try {
			Socket socket = new Socket("127.0.0.1", 8888);

			Scanner sc = new Scanner(System.in);
			while (true) {
				String str = sc.next();

				OutputStream out = socket.getOutputStream();
				DataOutputStream dos = new DataOutputStream(out);
				dos.writeUTF(str);
				dos.flush();

				InputStream in = socket.getInputStream();
				DataInputStream dis = new DataInputStream(in);
				String strs = dis.readUTF();
				System.out.println("客户端："+strs);
				
				if (str.equals("bye")) {
					in.close();
					out.close();
					socket.close();
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
		}

	}
}