创建socket服务

package com.z.socket;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

@Component
@Slf4j
public class ServerSocketConfig {
    public static ServerSocket serverSocket = null;

    private static final ThreadPoolExecutor threadpool = new ThreadPoolExecutor(15, 15,
            10L, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());

    @Bean
    public void socketCreate() {
        // 使用多线程创建，accept() 会阻塞程序执行（后面代码不能被执行）
        Runnable socketRun = new Thread() {
            @Override
            public void run() {
                log.info("创建socket线程");
                try {
                    serverSocket = new ServerSocket(514);
                    log.info("socket服务端开启");
                    while (true) {
                        Socket socket = serverSocket.accept();
                        log.info("接收到客户端socket" + socket.getRemoteSocketAddress());
                        threadpool.execute(new ServerReceiveThread(socket));
                    }
                } catch (IOException e) {
                    log.info("socket服务启动异常");
                    e.printStackTrace();
                }
            }
        };
        new Thread(socketRun).start();
    }
}

监听数据

package com.z.config.socket;

import lombok.extern.slf4j.Slf4j;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

@Slf4j
public class ServerReceiveThread implements Runnable {

    private Socket socket;

    public ServerReceiveThread(Socket socket) {
        this.socket = socket;
    }

    /**
     * 解析为十六进制数据
     */
    private String getCode(byte[] req) {
        String HEXES = "0123456789ABCDEF";
        final StringBuilder hex = new StringBuilder(2 * req.length);

        for (int i = 0; i < req.length; i++) {
            byte b = req[i];
            hex.append(HEXES.charAt((b & 0xF0) >> 4))
                    .append(HEXES.charAt((b & 0x0F))).append(" ");
        }
        return hex.toString();
    }

    @Override
    public void run() {
        try {
            // 接收客户端信息
            InputStream inputStream = socket.getInputStream();
            // 发送客户端信息
            OutputStream outputStream = socket.getOutputStream();
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            DataOutputStream dout = new DataOutputStream(out);
            byte[] b = new byte[1024];
            int len = 0;
            while ((len = inputStream.read(b)) != -1) {
                dout.write(b, 0, len);
            }
            String data = getCode(out.toByteArray());
            log.info("服务器收到消息：{}", data);
            log.info("服务器解析消息: {}", out.toString());
            String msg = "server response success";
            outputStream.write(msg.getBytes());
            # 关闭流
            dout.close();
            out.close();
            inputStream.close();
            outputStream.close();
            socket.close();
        } catch (Exception e) {
            log.info("接收数据异常socket关闭");
            e.printStackTrace();
        } finally {
            log.info("数据异常数据要怎么保留");
        }
    }
}