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Java网络编程基础主要包括以下几个要点:
Socket
和 ServerSocket
:用于TCP连接。DatagramSocket
和 DatagramPacket
:用于UDP数据报。URL
和 URLConnection
:用于处理HTTP请求。InetAddress
:表示IP地址。ServerSocket
监听指定端口,等待客户端连接。Socket
连接到服务器的IP地址和端口。InputStream
和OutputStream
进行字节流传输。BufferedReader
和PrintWriter
进行字符流传输。DatagramSocket
发送和接收DatagramPacket
。IOException
、SocketException
等。Thread
类或ExecutorService
来管理线程。SO_TIMEOUT
、TCP_NODELAY
等。import java.io.*;
import java.net.*;
public class TCPServer {
public static void main(String[] args) throws IOException {
ServerSocket serverSocket = new ServerSocket(8080);
System.out.println("Server started on port 8080");
while (true) {
Socket clientSocket = serverSocket.accept();
System.out.println("Client connected: " + clientSocket.getInetAddress());
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
String inputLine;
while ((inputLine = in.readLine()) != null) {
System.out.println("Received: " + inputLine);
out.println("Echo: " + inputLine);
}
clientSocket.close();
}
}
}
import java.io.*;
import java.net.*;
public class TCPClient {
public static void main(String[] args) throws IOException {
Socket socket = new Socket("localhost", 8080);
System.out.println("Connected to server");
BufferedReader userInput = new BufferedReader(new InputStreamReader(System.in));
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String userInputLine;
while ((userInputLine = userInput.readLine()) != null) {
out.println(userInputLine);
String response = in.readLine();
System.out.println("Server response: " + response);
}
socket.close();
}
}
通过掌握这些基础要点,你可以开始进行Java网络编程,并逐步构建更复杂的应用程序。
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