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PageAutoRefresh Project Dir Structure
PageRefreshServlet.java
import java.io.IOException; import java.io.PrintWriter; import java.util.Calendar; import java.util.GregorianCalendar; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class PageRefreshServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void init() throws ServletException { System.out .println("------------------------------------------------------"); System.out.println(" Init method is called in " + this.getClass().getName()); System.out .println("------------------------------------------------------"); } // Method to handle GET method request. public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println(" doGet method is called in " + this.getClass().getName()); // Set refresh, autoload time as 5 seconds response.setIntHeader("Refresh", 5); // Set response content type response.setContentType("text/html"); // Get current time Calendar calendar = new GregorianCalendar(); String am_pm; int hour = calendar.get(Calendar.HOUR); int minute = calendar.get(Calendar.MINUTE); int second = calendar.get(Calendar.SECOND); if (calendar.get(Calendar.AM_PM) == 0) am_pm = "AM"; else am_pm = "PM"; String CT = hour + ":" + minute + ":" + second + " " + am_pm; PrintWriter out = response.getWriter(); String title = "Auto Page Refresh using Servlet"; String docType = "<!doctype html public \"-//w3c//dtd html 4.0 " + "transitional//en\">\n"; out.println(docType + "<html>\n" + "<head><title>" + title + "</title></head>\n" + "<body bgcolor=\"#f0f0f0\">\n" + "<h1 align=\"center\">" + title + "</h1>\n" + "<p>Current Time is: " + CT + "</p>\n"); } // Method to handle POST method request. public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } public void destroy() { System.out .println("------------------------------------------------------"); System.out.println(" destroy method is called in " + this.getClass().getName()); System.out .println("------------------------------------------------------"); } }
web.xml
<?xml version="1.0" encoding="ISO-8859-1"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" metadata-complete="true" version="3.0"> <display-name>PageAutoRefresh</display-name> <description> This is a simple web application with a source code organization based on the recommendations of the Application Developer's Guide. </description> <servlet> <servlet-name>refresh</servlet-name> <servlet-class>PageRefreshServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>refresh</servlet-name> <url-pattern>/PageRefresh</url-pattern> </servlet-mapping> </web-app>
index.html
<!DOCTYPE HTML> <html lang="en"> <head> <meta charset="UTF-8"> <title>PageRefresh</title> </head> <body> <li><a href="PageRefresh">PageRefresh</a></li> </body> </html>
Environment Used
JDK version :1.6.0_30
Tomcat version : 7.0.50
To Download PageAutoRefreshApp Project Click the below link
https://sites.google.com/site/javaee4321/servlets/PageAutoRefreshApp.zip?attredirects=0&d=1
See also:
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