【Java】网络编程-UDP字典服务器客户端简单代码编写
2023-12-20 01:59:03
本文将讲述UDP字典服务器客户端简单代码编写。所谓回显,就是指客户端向服务器发送一个报文,从服务器那里得到一条一模一样的回响报文
而我们的字典功能呢,则是实现了输入中文,得到对应的英文
1、代码讲解
要实现这个功能,我们只需要对process()方法进行修改,即对处理request,返回response这个功能进行修改
要实现字典功能,我们在构造方法里定义一个Map数据结构,在Map中放入要翻译的词汇
public UdpDictServer(int port) throws SocketException {
socket = new DatagramSocket(port);
map.put("小狗","dog");
map.put("小猫","cat");
map.put("猪猪","pig");
}
然后对process()方法进行修改
public static String process(String key){
return map.get(key);
}
其余代码与回响程序相同?
2、完整代码
服务器端完整代码
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
import java.util.HashMap;
import java.util.Map;
public class UdpDictServer {
public static DatagramSocket socket = null;
static Map<String,String> map = new HashMap<>();
public UdpDictServer(int port) throws SocketException {
socket = new DatagramSocket(port);
map.put("小狗","dog");
map.put("小猫","cat");
map.put("猪猪","pig");
}
public static void start() throws IOException {
System.out.println("服务器开始!");
while (true){
DatagramPacket requestPacket = new DatagramPacket(new byte[1024],1024);
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] rec:%s,resp:%s",requestPacket.getAddress().toString(),requestPacket.getPort(),request,response);
}
}
public static String process(String key){
return map.get(key);
}
public static void main(String[] args) throws IOException {
UdpDictServer server = new UdpDictServer(9090);
server.start();
}
}
客户端完整代码
import UDPecho.UdpEchoClient;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.util.Scanner;
public class UdpDictClient {
public static DatagramSocket socket = null;
private static String ip = null;
private static int port = 0;
public UdpDictClient(String ip,int port) throws SocketException {
socket = new DatagramSocket();
this.ip = ip;
this.port = port;
}
public static void start() throws IOException {
System.out.println("客户端开始");
Scanner scanner = new Scanner(System.in);
while (true){
System.out.print("->");
String request = scanner.next();
DatagramPacket requestPacket = new DatagramPacket(request.getBytes(),request.getBytes().length, InetAddress.getByName(ip),port);
socket.send(requestPacket);
DatagramPacket responsePacket = new DatagramPacket(new byte[1024],1024);
socket.receive(responsePacket);
String response = new String(responsePacket.getData(),0,responsePacket.getLength());
System.out.println(response);
}
}
public static void main(String[] args) throws IOException {
UdpDictClient client = new UdpDictClient("127.0.0.1",9090);
client.start();
}
}
实现结果
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文章来源:https://blog.csdn.net/m0_64921476/article/details/134977886
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