Socket练习

JavaTCP客户端与服务器通信示例

原创已于 2023-08-06 16:40:12 修改 · 163 阅读

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#Java基础

于 2023-08-06 16:38:56 首次发布

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本文展示了如何在Java中实现TCP客户端向192.168.126.1的8989端口发送消息，并捕获服务器响应，包括客户端和服务端的Socket操作及异常处理。

客户端发送内容到服务端，服务端将内容打印到控制台

package internet;

import org.junit.Test;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * @author 苗晓强
 * @date 2023/8/6 15:07
 */
public class TCPTest {
    @Test
    public void client(){
        Socket socket = null;
        OutputStream outputStream = null;
        try {
            //服务端的IP地址
            InetAddress inetAddress = InetAddress.getByName("192.168.126.1");
            //服务端的端口号
            int port = 8989;
            socket = new Socket(inetAddress,port);
            outputStream = socket.getOutputStream();
            outputStream.write("你好，我是客户端".getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (outputStream != null){
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    @Test
    public void server(){
        //服务端Socket类 ServerSocket
        ServerSocket serverSocket = null;
        Socket socket = null;
        InputStream inputStream = null;
        try {
            int port = 8989;
            serverSocket = new ServerSocket(port);
            socket = serverSocket.accept();
            inputStream = socket.getInputStream();
            int len;
            byte [] buffer = new byte[1024];
            //避免出现中文乱码 使用 ByteArrayOutputStream
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            while ((len = inputStream.read(buffer)) != -1){
                byteArrayOutputStream.write(buffer,0,len);
            }
            System.out.println(socket.getInetAddress().getHostAddress());
            System.out.println(byteArrayOutputStream.toString());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (serverSocket != null){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (inputStream != null){
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}