在Java中,使用Socket编程实现远程通信主要包括两个步骤:创建客户端(Client)和服务器端(Server)。下面是一个简单的示例,展示了如何使用Java Socket编程实现客户端和服务器之间的通信。
- 创建服务器端(Server):
import java.io.*; import java.net.*; public class Server { public static void main(String[] args) throws IOException { int port = 12345; ServerSocket serverSocket = new ServerSocket(port); System.out.println("Server is listening on port " + port); Socket socket = serverSocket.accept(); System.out.println("Client connected"); InputStream inputStream = socket.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String message = reader.readLine(); System.out.println("Received message: " + message); OutputStream outputStream = socket.getOutputStream(); PrintWriter writer = new PrintWriter(outputStream, true); writer.println("Hello from server!"); socket.close(); serverSocket.close(); } }
- 创建客户端(Client):
import java.io.*; import java.net.*; public class Client { public static void main(String[] args) throws IOException { String serverAddress = "localhost"; int port = 12345; Socket socket = new Socket(serverAddress, port); System.out.println("Connected to server"); OutputStream outputStream = socket.getOutputStream(); PrintWriter writer = new PrintWriter(outputStream, true); writer.println("Hello from client!"); InputStream inputStream = socket.getInputStream(); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); String message = reader.readLine(); System.out.println("Received message: " + message); socket.close(); } }
在这个示例中,服务器端监听指定端口(12345),当客户端连接到服务器时,服务器会读取客户端发送的消息,并向客户端发送一条消息。客户端连接到服务器后,会向服务器发送一条消息,并接收服务器返回的消息。
要运行这个示例,请首先运行Server类,然后运行Client类。你会看到客户端和服务器之间的通信输出。
这只是一个简单的示例,实际应用中可能需要考虑更多因素,例如多线程处理并发连接、异常处理、加密通信等。