【新手一看就懂】翻译软件的后台代码是怎么写的【一个用socket的UDP实现的翻译后台】
1. 服务器
package DailyLearning;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class UdpEchoServer {
private DatagramSocket socket = null;
public UdpEchoServer(int port) throws SocketException {
socket = new DatagramSocket(port);
}
public void start() throws IOException {
System.out.println("服务器启动!");
while (true) {
DatagramPacket requestPacket = new DatagramPacket(new byte[4096], 4096);
socket.receive(requestPacket);
String request = new String(requestPacket.getData(), 0, requestPacket.getLength());
String response = process(request);
DatagramPacket responsePacket = new DatagramPacket(response.getBytes(), response.getBytes().length,
requestPacket.getSocketAddress());
socket.send(responsePacket);
System.out.printf("[%s:%d] req: %s; resp: %s\n", requestPacket.getAddress().toString(),
requestPacket.getPort(), request, response);
}
}
public String process(String request) {
return request;
}
public static void main(String[] args) throws IOException {
UdpEchoServer server = new UdpEchoServer(9090);
server.start();
}
}
package DailyLearning;
import java.io.IOException;
import java.net.SocketException;
import java.util.HashMap;
import java.util.Map;
public class UdpTranslateServer extends UdpEchoServer {
private Map<String, String> dict = new HashMap<>();
public UdpTranslateServer(int port) throws SocketException {
super(port);
dict.put("cat", "小猫");
dict.put("dog", "小狗");
dict.put("fuck", "卧槽");
}
@Override
public String process(String request) {
return dict.getOrDefault(request, "词在词典中未找到");
}
public static void main(String[] args) throws IOException {
UdpTranslateServer server = new UdpTranslateServer(9090);
server.start();
}
}
2. 客户端
package DailyLearning;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class UdpEchoServer {
private DatagramSocket socket = null;
public UdpEchoServer(int port) throws SocketException {
socket = new DatagramSocket(port);
}
public void start() throws IOException {
System.out.println("服务器启动!");
while (true) {
DatagramPacket requestPacket = new DatagramPacket(new byte[4096], 4096);
socket.receive(requestPacket);
String request = new String(requestPacket.getData(), 0, requestPacket.getLength());
String response = process(request);
DatagramPacket responsePacket = new DatagramPacket(response.getBytes(), response.getBytes().length,
requestPacket.getSocketAddress());
socket.send(responsePacket);
System.out.printf("[%s:%d] req: %s; resp: %s\n", requestPacket.getAddress().toString(),
requestPacket.getPort(), request, response);
}
}
public String process(String request) {
return request;
}
public static void main(String[] args) throws IOException {
UdpEchoServer server = new UdpEchoServer(9090);
server.start();
}
}