timeservlet.java

一个前台基于AJAX

package com.demo2.web.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

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

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import com.demo2.domain.Second;
import com.demo2.persist.ShowTimeDao;
import com.demo2.persist.ShowTimeDaoImpl;

public class TimeServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
         
		
		String flag = request.getParameter("flag");
		ShowTimeDao showTimeDao = new ShowTimeDaoImpl();
		
		
		
		
		if("update".equals(flag)){
			 int id =0;
			request.setCharacterEncoding("utf-8");
			String json = request.getReader().readLine();
			System.out.print(json+"------");
			JSONObject obj = JSONObject.fromObject(json);
			System.out.println(obj+"=======");
			Second second = (Second) JSONObject.toBean(obj,Second.class);
			String second1 = request.getParameter("second");
			String id1= request.getParameter("id");
			if(id1!=null&&id1.length()>0){
				id =Integer.parseInt(id1);
			  }
			System.out.println(second1+"id=="+id+"--------");
			showTimeDao.updateTimeById(id, second1);
			List<Second> list1 = showTimeDao.showTime();
			JSONArray arrry = JSONArray.fromObject(list1);
			response.setContentType("application/javascript;charset=utf-8");
			PrintWriter out = response.getWriter();
			System.out.println(list1+"<<<<");
			out.print(arrry);
			///response.setContentType("application/javascript;charset=utf-8");
			
			
		}else{
			List<Second> list = showTimeDao.showTime();
			request.setAttribute("list", list);
			request.getRequestDispatcher("index1.jsp").forward(request, response);
		}

		/*if ("find".equals(flag)) {
			request.setCharacterEncoding("utf-8");
			// 实现线程安全，同步
            Second seconds = showTimeDao.showTimes();
		//	List<Second> list = showTimeDao.showTime();
			if ("-1".equals(seconds.getSecond())) {
				String second = "begin";
				seconds.setSecond(second);
			}
			//JSONArray array = JSONArray.fromObject(list);
			JSONObject object = JSONObject.fromObject(seconds);
		///	Second se =(Second) object.toBean(object,Second.class);
			///Second bean = (formBean) object.toBean(js, formBean.class)
			response.setContentType("application/javascript;charset=utf-8");
			PrintWriter out = response.getWriter();
			out.println(object.get("second"));
			System.out.println(object.get("second"));
			//out.print(array);
			//System.out.println(array+"===");
			//for (int i = 0; i < list.size(); i++) {
				//Second sc = list.get(i);
				// 当second--1的时候把他至为开始
				if ("begin".equals(seconds.getSecond())) {

					showTimeDao.resetTime();

				} else {

					if (Integer.parseInt(seconds.getSecond()) == 60) {
						new UpdateThread().start();
					}

				}
			//}

		}
		// 加15秒
		if ("addTime".equals(flag)) {
			showTimeDao.addTime();

		}
*/
	}
  //创建servlet的时候把数据库里面的秒设置为-1
	public void init() throws ServletException {
		/*ShowTimeDao showTimeDao = new ShowTimeDaoImpl();
		showTimeDao.reverseTime();
		new UpdateThread().start();*/
	}

}