June 2004
Beginner to intermediate
364 pages
7h 38m
English
Content preview from Eclipse CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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11.4. Creating a Servlet
Problem
You want to use Eclipse to develop servlets.
Solution
Develop the servlet’s Java code using Eclipse, and
add servlet.jar or
servlet-api.jar (depending on your version of
Tomcat) as external .jar files. After compiling
the servlet, copy it over to your Tomcat installation.
Discussion
JSP files such as that developed in the previous recipe were introduced to make online Java programming easier. JSPs actually are compiled into servlet code, which is pure Java code, with no HTML mixed in. Developing servlets in Eclipse is like developing other Java code: Eclipse can detect problems even before you compile.
You can see the Java code for a servlet in Example 11-2. Servlet code such as this extends the
HttpServlet class, and you have to include a
.jar file in the build path to get that support.
In Tomcat 4.x, that .jar file is
servlet.jar; in Tomcat 5.x,
it’s servlet-api.jar.
Example 11-2. A sample servlet
package org.cookbook.ch11; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class ServletClass extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { response.setContentType("text/html"); PrintWriter out = response.getWriter( ); out.println("<HTML>"); out.println("<HEAD>"); out.println("<TITLE>"); out.println("Servlet Sample"); out.println("</TITLE>"); out.println("</HEAD>"); out.println("<BODY>"); out.println("<H1>"); out.println("Servlet Sample"); ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.