java监听服务器端口

Java实现服务器监听，接收并处理请求,在网络编程中，服务器监听是一个重要的环节，服务器需要监听客户端的连接请求，接收数据并将其传递给相应的处理程序，本文将介绍如何使用Java实现服务器监听，接收并处理请求。,,1、创建Serversocket对象,我们需要创建一个ServerSocket对象，用于监听客户端的连接请求，ServerSocket类位于java.net包中，它的构造方法接受一个整数参数，表示端口号，我们可以创建一个监听8080端口的ServerSocket对象：,2、接收客户端连接,,当有客户端连接到服务器时，ServerSocket对象的accept()方法会返回一个新的Socket对象，用于与客户端通信，我们可以使用一个循环来不断接收新的客户端连接：,3、处理客户端请求,当接收到客户端连接后，我们需要为每个客户端连接创建一个新的线程，以便并发处理多个客户端的请求，我们可以使用Thread类或Runnable接口来实现多线程：,,ClientHandler类负责处理客户端的请求：,使用Java的ServerSocket类可以监听服务器端口，通过accept()方法接收客户端连接请求。,import java.net.ServerSocket; public class Server { public static void main(String[] args) { try { ServerSocket serverSocket = new ServerSocket(8080); } catch (Exception e) { e.printStackTrace(); } } },import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; public class Server { public static void main(String[] args) { try { ServerSocket serverSocket = new ServerSocket(8080); while (true) { Socket socket = serverSocket.accept(); // 处理客户端连接 } } catch (IOException e) { e.printStackTrace(); } finally { try { serverSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } },import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; public class Server { public static void main(String[] args) { try { ServerSocket serverSocket = new ServerSocket(8080); while (true) { Socket socket = serverSocket.accept(); new Thread(new ClientHandler(socket)).start(); } } catch (IOException e) { e.printStackTrace(); } finally { try { serverSocket.close(); } catch (IOException e) { e.printStackTrace(); } } } },import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.atomic.AtomicInteger; import org.springframework.stereotype.Component; @Component(“clientHandler”) public class ClientHandler implements Runnable{ private AtomicInteger id=new AtomicInteger(0); private Socket socket; private PrintWriter writer; private BufferedReader reader; private String name; private ExecutorService pool=Executors.newCachedThreadPool(); @Override public void run(){ try{ //读取客户端信息 writer=new PrintWriter(socket.getOutputStream()); reader=new BufferedReader(new InputStreamReader(socket.getInputStream())); name=(reader.readLine())==null?””:reader.readLine(); System.out.println(“新用户”+name+”已上线！”); //向所有在线用户发送消息 pool.execute(new Runnable(){ @Override public void run(){ try{ writer=new PrintWriter(socket, true); }catch (Exception e){ e.printStackTrace(); }writer.println(“欢迎”+name+”加入聊天室！”); }}); //获取用户输入的消息 while((msg=reader.readLine())!=null){ pool.execute(new Runnable(){ @Override public void run(){ try{ writer=new PrintWriter(socket, true); }catch (Exception e){ e.printStackTrace(); }writer.println(“<>”+name+”：”+msg); }}); }catch (Exception e){ e.printStackTrace(); }finally{ //关闭资源 try{ reader=null; writer=null; socket=null; }catch (Exception e){ e.printStackTrace(); }pool=null; } } } @Override public String toString(){ return “ClientHandler [id=”+id+”, name=”+name+”]”; } } “` 4. 关闭服务器和资源,