Java Web項目中應用Socket通訊多線程、長銜接的辦法。本站提示廣大學習愛好者:(Java Web項目中應用Socket通訊多線程、長銜接的辦法)文章只能為提供參考,不一定能成為您想要的結果。以下是Java Web項目中應用Socket通訊多線程、長銜接的辦法正文
許多時刻在javaweb項目中我們須要用到Socket通訊來完成功效,在web中應用Socket我們須要樹立一個監聽法式,在法式啟動時,啟動socket監聽。我們的運用場景是在java項目中,須要外接如一個硬件裝備,經由過程tcp通訊,獲得裝備傳下去的數據,並對數據做回應。
先看一下web的監聽代碼:
import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; public class AttendSocetListener implements ServletContextListener{ private SocketThread socketThread; public void contextDestroyed(ServletContextEvent arg) { if(null!=socketThread && !socketThread.isInterrupted()) { socketThread.closeSocketServer(); socketThread.interrupt(); } } @Override public void contextInitialized(ServletContextEvent arg) { // TODO Auto-generated method stub if(null==socketThread) { //新建線程類 socketThread=new SocketThread(null); //啟動線程 socketThread.start(); } } }
創立線程:
import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; import java.util.ArrayList; import java.util.List; public class SocketThread extends Thread { private ServerSocket serverSocket = null; public SocketThread(ServerSocket serverScoket){ try { if(null == serverSocket){ this.serverSocket = new ServerSocket(); System.out.println("socket start"); } } catch (Exception e) { System.out.println("SocketThread創立socket辦事失足"); 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()){ //處置接收的數據 Thread t = new Thread(new SocketOperate(socket)); t.start(); }else{ break; } }catch (Exception e) { System.out.println("SocketThread創立socket辦事失足"); e.printStackTrace(); } } } public void closeSocketServer(){ try { if(null!=serverSocket && !serverSocket.isClosed()) { serverSocket.close(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
處置接收到的數據:
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.Socket; public class SocketOperate implements Runnable { private Socket socket; //該線程所處置的Socket所對應的輸出流 BufferedReader br = null; String str = null; String content = null; InputStreamReader reader=null; public SocketOperate(Socket socket) throws IOException { this.socket = socket; reader = new InputStreamReader(this.socket.getInputStream(),"utf-"); br = new BufferedReader(reader); } @Override public void run() { try { // 采取輪回赓續從Socket中讀取客戶端發送過去的數據 while (true) { content = readFromClient(); System.out.println(content); if (content == null) { break; } OutputStream os = socket.getOutputStream(); os.write(("RES, OK,<年班,小明>, ,#" + "\n").getBytes("utf-")); os.flush(); } } catch (IOException e) { e.printStackTrace(); } } //界說讀取客戶端數據的辦法 private String readFromClient() { try { str = br.readLine(); return str; } //假如捕獲到異常,注解該Socket對應的客戶端曾經封閉 catch (IOException e) { try { br.close(); reader.close(); socket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return null; } }
客戶端代碼:
package import java.io.*; import java.net.*; public class TalkClient { public static void main(String args[]) throws UnknownHostException, IOException { Socket socket=new Socket("...",); PrintWriter os=new PrintWriter(socket.getOutputStream()); BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream())); int i=; while(socket.isConnected()){ os.print("BEAT,,,,.,,#"+"\n"); os.flush(); System.out.println("Client:"+i); System.out.println("Server:"+is.readLine()); i++; } //持續輪回 os.close(); //封閉Socket輸入流 is.close(); //封閉Socket輸出流 socket.close(); //封閉Socket } }
以上所述是小編給年夜家引見的Java Web項目中應用Socket通訊多線程、長銜接的辦法,願望對年夜家有所贊助!