FixedThreadPool线程池executor

package com.bai.servlet;

import java.io.BufferedReader;
import java.io.IOException;
import java.util.Date;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.bai.vo.KaimenUtil;

/**
 * Servlet implementation class RenlianApi
 */
@WebServlet("/RenlianApi")
public class RenlianApi extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	public ExecutorService fixedThreadPool = Executors.newFixedThreadPool(3);
    /**
     * @see HttpServlet#HttpServlet()
     */
    public RenlianApi() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		System.out.println("doGet************************");
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		// TODO Auto-generated method stub
		System.out.println("doPost");
		BufferedReader br=request.getReader();
		String line=br.readLine();
		System.out.println("line1:"+line+"----"+new Date().toGMTString());
//		line:{"type":1,"data":"1224","time":1664258923,"deviceSn":"21C130006"}
		
		
        this.fixedThreadPool.execute(new Runnable() {
            public void run() {
              KaimenUtil km=new KaimenUtil();
              km.kaimen();
            }
          });
        
		
		System.out.println("line2:"+line+"----"+new Date().toGMTString());
		response.setCharacterEncoding("utf-8");
		response.setContentType("application/json");
//		response.getWriter().write("{\"code\":0}");
		response.getWriter().write("{\"code\":0,\"message\":\"success\"}");

	}

}