Java web servlet not working
Question
I have a real webpage using cPanel hosting where I am starting out with learning java web dev. I only use two files: index.jsp & FirstServlet.java. The HTML page is just not using the Java code and I am not quite sure why, I got the code from a demo to have a starting reference.
index.jsp:
<%@page import="java.util.Date"%>
<%@ page language="java" contentType="text/html; charset=US-ASCII"
pageEncoding="US-ASCII"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Hello</title>
</head>
<body>
<h2>Hi There!</h2>
<br>
<h3>Date=<%= new Date() %>
</h3>
</body>
</html>
FirstServlet.java:
package com.journaldev.first;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class FirstServlet
*/
@WebServlet(description = "My First Servlet", urlPatterns = { "/FirstServlet" , "/FirstServlet.do"}, initParams = {@WebInitParam(name="id",value="1"),@WebInitParam(name="name",value="pankaj")})
public class FirstServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public static final String HTML_START="<html><body>";
public static final String HTML_END="</body></html>";
/**
* @see HttpServlet#HttpServlet()
*/
public FirstServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
Date date = new Date();
out.println(HTML_START + "<h2>Hi There!</h2><br/><h3>Date="+date +"</h3>"+HTML_END);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}
Result:
2 answers
solution1
1 2017-09-02 17:45:06
Rename index.html to index.jsp . The JSP compiler doesn't know that this is a file it should compile.
Edit
To run a JSP you'll need to run it within a servlet container. A servlet container would do things like parse the JSP and create the output. It looks like you're just running on a plain webserver like Apache. Does your CPanel environment support Java? It looks like it doesn't based on what you're showing.
A very common servlet container is Tomcat . The Tomcat documentation is very good even if you're just getting started.
solution2
0 2017-09-02 17:58:27
The index.html should be renamed to index.jsp
The second is a normal .java file (servlet) and you are trying to make it a jsp file.
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