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。
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();
}
}
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。