Socket Client and Server-优快云博客

本文介绍了一个简单的 Java Socket 编程示例，包括客户端和服务端的实现过程。客户端通过 Socket 连接到本地主机的指定端口，并发送从控制台输入的数据。服务器端监听该端口，接收并打印客户端发送的消息。

Socket Client

package socket;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class Client {
    public static void main(String[] args) {
        OutputStream output = null;
        BufferedWriter writer = null;
        Socket socket = null;
        try {
            //1.创建socket
            socket = new Socket("localhost",9999);
            //2.获取输出流
            output = socket.getOutputStream();
            //3.输出流包装成缓冲流
            writer = new BufferedWriter(new OutputStreamWriter(output));
            Scanner input = new Scanner(System.in);
            System.out.println("start input");
            //4.写入到输出流
            writer.write(input.next());
            //5.提交数据
            writer.flush();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try {
                writer.close();
                output.close();
                socket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        
    }
}

Socket Server

package socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) {
        Socket socket = null;
        ServerSocket server = null;
        InputStream is = null;
        BufferedReader reader = null;
        try {
            //1.开启监听
            server = new ServerSocket(9999);
            System.out.println("start listener");
            //2.接受客户端传过来的信息
            socket = server.accept();
            //3.获取输入流
            is = socket.getInputStream();
            //4.输入流包装成缓冲流
            reader = new BufferedReader(new InputStreamReader(is));
            //5.读取打印
            System.out.println(reader.readLine());
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try {
                is.close();
                reader.close();
                socket.close();
                server.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

转载于:https://my.oschina.net/boonya/blog/359497