ServletContextListenersocket实现数据接收

1.创建ServletContextListener 监听器

package com.chinalbs.common.utils;import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;import org.springframework.web.context.support.WebApplicationContextUtils;import com.chinalbs.business.service.EnvironprotectRealtimeDataService;public class EquipmentSocetListener implements ServletContextListener {private SocketThread socketThread;@Overridepublic void contextInitialized(ServletContextEvent sce) {EnvironprotectRealtimeDataService erdService = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext()).getBean(EnvironprotectRealtimeDataService.class);if (null == socketThread) {// 新建线程类socketThread = new SocketThread(null,erdService);// 启动线程socketThread.start();}}@Overridepublic void contextDestroyed(ServletContextEvent sce) {if (null != socketThread && !socketThread.isInterrupted()) {socketThread.closeSocketServer();socketThread.interrupt();}}}


erdService 是后面需要进行具体业务处理的service实例，SocketThread类是自定义的线程类

2.SocketThread线程类代码

package com.chinalbs.common.utils;import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;import com.chinalbs.business.service.EnvironprotectRealtimeDataService;public class SocketThread extends Thread {private ServerSocket serverSocket = null;private static final int PORT = 9092;private EnvironprotectRealtimeDataService erdService;public SocketThread(ServerSocket serverScoket,EnvironprotectRealtimeDataService erdService) {this.erdService = erdService;try {if (null == serverSocket) {this.serverSocket = new ServerSocket(PORT);System.out.println("socket start");}} catch (Exception e) {System.out.println("SocketThread创建socket服务出错");e.printStackTrace();}}public void run() {while (true) {try {if (serverSocket == null) {break;} else if (serverSocket.isClosed()) {break;}Socket socket = serverSocket.accept();if (null != socket && !socket.isClosed()) {// 处理接收的数据Thread t1 = new Thread(new SocketOperate(socket,erdService));t1.start();} else {break;}} catch (Exception e) {System.out.println("SocketThread创建socket服务出错111111111111111111111111");e.printStackTrace();}}}public void closeSocketServer() {try {if (null != serverSocket && !serverSocket.isClosed()) {serverSocket.close();}} catch (IOException e) {e.printStackTrace();}}
}


SocketOperate是自定义的socket具体业务操作类

3.SocketOperate代码

package com.chinalbs.common.utils;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;import org.apache.commons.lang.ArrayUtils;import com.chinalbs.business.model.EnvironprotectRealtimeData;
import com.chinalbs.business.service.EnvironprotectRealtimeDataService;import net.sf.json.JSONObject;public class SocketOperate implements Runnable {private EnvironprotectRealtimeDataService erdService;private Socket socket;// 该线程所处理的Socket所对应的输入流BufferedReader br = null;String str = null;String cOntent= null;InputStreamReader reader = null;public SocketOperate(Socket socket,EnvironprotectRealtimeDataService erdService) throws IOException {this.socket = socket;this.erdService = erdService;reader = new InputStreamReader(this.socket.getInputStream(), "GBK");br = new BufferedReader(reader);}@Overridepublic void run() {try {// 采用循环不断从Socket中读取客户端发送过来的数据while (true) {cOntent= readFromClient();System.out.println(content);if (cOntent== null) {//重发，或者什么都不做break;}else{//验证接受到的信息是否正确，判断校验码是否一致//一致，响应信息,插入数据OutputStream os = socket.getOutputStream();String respOnseStr= dataHandler(content);os.write(responseStr.getBytes());os.flush();//不一致，重发或者什么都不做}}} catch (IOException e) {e.printStackTrace();}}//数据处理private String dataHandler(String data){//此处需要返回具体的应答数据，具体的数据格式，根据具体的业务要求}// 定义读取客户端数据的方法private String readFromClient() {try {str = br.readLine();return str;}// 如果捕捉到异常，表明该Socket对应的客户端已经关闭catch (IOException e) {try {br.close();reader.close();socket.close();} catch (IOException e1) {e1.printStackTrace();}}return null;}}


4.配置web.xml

5.将项目运行起来后可以查看器端口监听情况，这里监听的端口是9092，在window下，可以使用命令 netstat -aon|findstr "9092"，在linux下可以使用命令netstat -tunlp|grep 9092

具体项目源码请参考https://download.csdn.net/download/jinxiumeihappy/12115422