Required component
- Eclipse Platform
- Java 6 SDK
- Apache Tomcat
The Eclipse IDE is an open source IDE . It
provides tools for developing standard Java web applications and Java EE
applications. Eclipse is great tool for creating HTML, JSPs, and
servlets.Eclipse WTP simplifies the creation these web artifacts and provides
runtime environments in which these artifacts can be deployed, started and
debugged. In Eclipse WTP you create "Dynamic Web Projects". These projects
provide the necessary functionality to run, debug and deploy Java web
applications.
Eclipse WTP supports all mayor webcontainer, e.g. Jetty and Apache Tomcat as
well as the mayor Java EE application server. This article uses Apache Tomcat as
a webcontainer.
You need the Java SDK to run servlets on your
machine.
Apache Tomcat is an open source Web and servlet
container, used in the official reference implementations for Java Servlet and
Java Server Pages.To install Apache Tomcat, extract the files from the
downloaded archive and place them into a directory. I put them in my C:\Program
Files directory to make them easy to locate later. That's it for now.
Create a new web project
Step 1: From the Eclipse IDE, select a
workspace after that click the ok button.
Step 2: Set the Perspective to Java EE (if not set by default).
Click on the ok button.
Step 3: Create a new project from File->New->Project to view the project
wizards. From project wizards select web->dynamic web project. Click on
next button.
Step 4: Enter the details for the project for e.g. Project Name, Target runtime,
Configuration etc. For now, we can concentrate on Project Name (Here
project name WecomeServlet) and target Runtime. Target Runtime is used to set the
runtime environment for your servlet programs.
Click on finish button.
Step 5:
Setting up the Target Runtime: Select Windows -> Preferences -> Server ->
Runtime Environments to configure WTP to use Tomcat Press Add.
Click next button
Then Specify the installation directory of Tomcat directory.
Press finish button, then after click on ok button.
Step 6: At this stage the Project is created in eclipse. Now right click on the
project and create new Servlet.
Step 7: Enter the details of your servlet and click finish.Write the
business logic in the service() or doGet() or doPost() method.
import
java.io.IOException;
import
java.io.PrintWriter;
import
javax.servlet.*;
import
javax.servlet.http.*;
public class SerLifeCycle extends HttpServlet
{
int count=0;
public void
init(ServletConfig config)throws ServletException
{
super.init(config);
}
protected void
service(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException
{
response.setContentType("text/html");
PrintWriter
pw=response.getWriter();
count++;
java.util.Date
d = new java.util.Date();
pw.println("<html><body>");
pw.println("Since
loading, this servlet has been accessed " + count + "
times.");
pw.println(" the
current time and date is " +d.toString());
pw.println("</body></html>");
}
}
Step 8: Select
your servlet, right-click on it and select Run As -> Run on Server.The server will start by itself and will run the program for you, if there is no error.
In this case the output will be printed as
