Java写UDP实现简单的聊天功能

港控/mmm° 2023-03-14 05:53 100阅读 0赞

这是用UDP实现简单的聊天功能：  
**客户端**：

package 套接字编程.UDP聊天;
    
    import javax.security.sasl.SaslException;
    import java.io.IOException;
    import java.net.*;
    import java.util.Scanner;
    
    /**
     * Create with Darcula IDEA
     * Description:
     * 客户端
     */
    public class UdpChatClient {
        
        public static void main(String[] args) {
        
            System.out.println("======顾客======");
            try {
        
                //1.创建数据报套接字
                DatagramSocket socket = new DatagramSocket(8888);
                Scanner scanner = new Scanner(System.in);
                while(true){
        
                    //2.获取用户输入
                    String message = scanner.next();
                    //将输入封装成数组
                    byte[] content = message.getBytes();//得到一个操作系统默认的编码格式的字节数组
                    //3.创建数据报包
                    DatagramPacket packet = new DatagramPacket(content,content.length,InetAddress.getLocalHost(),9999);
                    //4.发送数据
                    socket.send(packet);
                    //5.接受数据
                    byte[] content2 = new byte[1024];
                    DatagramPacket packet2 = new DatagramPacket(content2,content2.length);
                    socket.receive(packet2);
                    //将接收的客服的数据封装成数组
                    byte[] serverMessage = packet2.getData();
                    //从数组转化为字符串
                    String str = new String(serverMessage,0,serverMessage.length);
                    System.out.println("客服说：" + str);
                    if(message.equals("bye")){
        
                        break;
                    }
                }
                socket.close();
            }catch (SocketException e){
        
                e.printStackTrace();
            }catch (UnknownHostException e){
        
                e.printStackTrace();
            }catch(IOException e){
        
                e.printStackTrace();
            }
    
    
        }
    }

**服务端：**

package 套接字编程.UDP聊天;
    
    import java.io.IOException;
    import java.net.DatagramPacket;
    import java.net.DatagramSocket;
    import java.net.InetAddress;
    import java.net.SocketException;
    import java.rmi.UnexpectedException;
    import java.util.Scanner;
    
    /**
     * Create with Darcula IDEA
     * Description:
     * 服务端
     */
    public class UdpChatServer  {
        
        public static void main(String[] args) {
        
            System.out.println("======客服======");
            try{
        
                //1.创建数据报套接字
                DatagramSocket socket = new DatagramSocket(9999);
                Scanner scanner = new Scanner(System.in);
                while(true){
        
                    //2.接受数据
                     byte[] content2 = new byte[1024];
                    DatagramPacket packet2 = new DatagramPacket(content2,content2.length);
                    socket.receive(packet2);
                    byte[] clientMessage = packet2.getData();
                    String str = new String(clientMessage,0,clientMessage.length);
                    System.out.println("顾客说："+ str);
                    //3.获取用户输入
                    String message = scanner.next();
                    byte[] content = message.getBytes();
                    //4.创建数据报包
                    DatagramPacket packet = new DatagramPacket(content,content.length,InetAddress.getLocalHost(),8888);
                    //5.发送数据
                    socket.send(packet);
                    if(message.equals("bye")){
        
                        break;
                    }
                }
                //6.释放资源
                socket.close();
            }catch (SocketException e){
        
                e.printStackTrace();
            }catch (UnexpectedException e){
        
                e.printStackTrace();
            }catch (IOException e){
        
                e.printStackTrace();
            }
        }
    }