套接字编程学习

Big_data_example/java_learning/src/main/java/com/markilue/java_learning/network/TCPServer.java

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+package com.markilue.java_learning.network;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintStream;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+/**
+ *@BelongsProject: java_learning
+ *@BelongsPackage: com.markilue.java_learning.network
+ *@Author: dingjiawen
+ *@CreateTime: 2022-12-22  18:54
+ *@Description: TODO  TCP套接字通信编程实例
+ *@Version: 1.0
+ */
+public class TCPServer {
+
+    //服务端代码
+    public static void main(String[] args) throws IOException {
+        //创建一个ServerSocket,用于监听客户端的连接请求
+        ServerSocket serverSocket = new ServerSocket();
+        //绑定一个地址和端口，此后通过这个地址和端口监听客户端的请求
+        serverSocket.bind(new InetSocketAddress("127.0.0.1",8000));
+
+        //循环不断接受来自客户端的连接
+        while (true){
+            System.out.println("创建好了连接,等待客户端");
+            //接收到了客户端的连接
+            Socket socket = serverSocket.accept();
+            System.out.println("收到客户端请求并接受");
+            //io流交互通信
+            PrintStream printStream = new PrintStream(socket.getOutputStream(), true, "UTF-8");
+            printStream.println("服务器说:"+socket.getInetAddress()+",来了老弟");
+            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+            System.out.println("收到来自客户端的信息:"+in.readLine());
+            System.out.println("接受完毕,准备关闭监听");
+            //关闭
+            printStream.close();
+            in.close();
+            socket.close();
+//            break;
+
+        }
+
+        /*
+        打印结果：
+            创建好了连接,等待客户端
+            收到客户端请求并接受
+            收到来自客户端的信息:客户端向您问好
+            接受完毕,准备关闭监听
+            创建好了连接,等待客户端
+         */
+
+    }
+
+}
+
+//TCP客户端
+class TCPClient{
+
+
+    public static void main(String[] args) throws IOException {
+        //创建一个Socket，向服务器发出连接请求
+        Socket socket = new Socket();
+        socket.connect(new InetSocketAddress("127.0.0.1",8000));//连接指定端口
+
+        //IO流交互通信
+        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+        System.out.println("来自服务器端的信息:"+reader.readLine());
+        //向服务器写数据
+        PrintStream ps = new PrintStream(socket.getOutputStream(), true, "UTF-8");
+        ps.println("客户端向您问好");
+
+        //关闭连接
+        reader.close();
+        socket.close();
+        //打印结果：来自服务器端的信息:服务器说:/127.0.0.1,来了老弟
+
+    }
+
+}

Big_data_example/java_learning/src/main/java/com/markilue/java_learning/network/UDPServer.java

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+package com.markilue.java_learning.network;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetSocketAddress;
+import java.net.SocketException;
+import java.nio.charset.StandardCharsets;
+
+/**
+ *@BelongsProject: java_learning
+ *@BelongsPackage: com.markilue.java_learning.network
+ *@Author: dingjiawen
+ *@CreateTime: 2022-12-22  19:15
+ *@Description: TODO  UDP套接字通信
+ *@Version: 1.0
+ */
+public class UDPServer {
+
+    public static void main(String[] args) throws IOException {
+        System.out.println("---接收方启动中---");
+        //1.使用DatagramSocket指定端口  创建接收端
+        DatagramSocket server = new DatagramSocket(8000);
+        //2.准备容器  封装成DatagramPacket包裹
+        byte[] container = new byte[1024 * 60];
+        DatagramPacket packet = new DatagramPacket(container, 0, container.length);
+        //3.阻塞式接受包裹receive(DatagramPacket p)
+        server.receive(packet);
+        //4.分析数据  byte[]  getData()  getLength()
+        byte[] data = packet.getData();
+        int length = packet.getLength();
+        //操作获取到的数据
+        System.out.println(new String(data,0,length));
+        //返回给客户端信息
+        packet.setData("服务器收到了".getBytes());
+        server.send(packet);
+        //5.释放资源
+        server.close();
+
+        /*
+            ---接收方启动中---
+            客户端发送请求
+         */
+    }
+}
+
+
+class UDPClient{
+
+    public static void main(String[] args) throws IOException {
+        System.out.println("---发送方启动中---");
+        //1.使用DatagramSocket指定端口  创建发送端
+        DatagramSocket client = new DatagramSocket(8888);
+        //2.准备一定数据，并转为字节数组
+        String data="客户端发送请求";
+        byte[] datas = data.getBytes();
+        //3.封装成DatagramPacket包裹，需要指定目的地
+            //传入参数为  (数据集,数据初始位置即0,,数据长度,接收端对象(接收端地址,接收端端口))
+        DatagramPacket packet = new DatagramPacket(datas, 0, datas.length, new InetSocketAddress("localhost", 8000));
+
+        //4.发送send(DatagramPacket p)
+        client.send(packet);
+        //接受服务器返回的消息
+        client.receive(packet);
+        //操作获取到的数据
+        System.out.println(new String(packet.getData(),0,packet.getLength()));
+        //5.释放资源
+        client.close();
+
+        /*
+            ---发送方启动中---
+            服务器收到了
+         */
+
+    }
+}