📄 admintemperatureservlet.java
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/*
* AdminTemperatureServlet.java
*
* Created on 2007年10月16日, 下午9:01
*/
package com.servlet;
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
*
* @author hyl
* @version
*/
public class AdminTemperatureServlet extends HttpServlet {
/** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
*/
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/** Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
String Temperature=(String)getServletContext().getAttribute("Temperature");
if(Temperature==null){
//从初始化参数中拿
Temperature=(String)getInitParameter("Temperature");
//放入应用上下文
getServletContext().setAttribute("Temperature",Temperature); }
out.println("<HTML><HEAD><TITLE>气温更新 "
+ "</TITLE></HEAD>");
out.println("<BODY><TABLE border=\"0\" width=\"100%\"><tr>");
out.println("<td align=\"left\" valign=\"bottom\">");
out.println("<H1>当前气温</H1></td></tr></TABLE>");
out.print("<FORM ACTION=\"");
out.println(response.encodeURL("adminTemperature"));
out.println("\" METHOD=\"POST\">");
out.println("当前气温（摄氏度）");
out.println("<INPUT TYPE=\"text\" NAME=\"temperature\" "
+ "VALUE="+Temperature+">");
out.println("<INPUT TYPE=\"Submit\" NAME=\"btn_submit\" "
+ "VALUE=\"更新\">");
out.println("</FORM></BODY></HTML>");
}
/** Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
String Temperature=request.getParameter("temperature");
// 将更新后的气温信息放入上下文
getServletContext().setAttribute("Temperature",Temperature);
out.println("<HTML><HEAD><TITLE>气温更新 "
+ "</TITLE></HEAD>");
out.println("<BODY>");
out.println("当前气温："+Temperature+"摄氏度");
out.println("</BODY></HTML>");
}
/** Returns a short description of the servlet.
*/
public String getServletInfo() {
return "Short description";
}
// </editor-fold>
}
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