Skip to main content

Setting up Java Servlet & JSP Environment With APACHE TOMCAT SERVER

=================================================================
Setting up Java Servlet and JSP Environment With APACHE TOMCAT SERVER
=================================================================
•    Required tools
    o    Jdk [eg. Jdk7.0]
    o    Apache Tomcat Server [eg. Tomcat 7.0]
 
     [Note: This tutorial will work on Apache tomcat  7.0]
     [Note: Place your tomcat directory into C:\]
     [Note: Install the jdk into C:\Program files\]
 

•    Sitting up Java Environment
    o    Install JDK
    o    After successful installation find the “BIN” directory within installation directory       [eg. C:\Program Files\Java\jdk1.6.0_26\bin]. Copy the full path and set the “PATH”
environment variable as the copied path; [eg. PATH=C: \Program Files\Java\jdk1.6.0_26\bin]      
                

 [Nb. How to set environment variable? Follow at last of this topic]

•    Setting up Apache
    o    CREATE three environment variables as JAVA_HOME, JRE_HOME,CATALINA_HOME
    o    Set path for JAVA_HOME as eg. C:\Program Files\Java\jdk1.6.0_26\
    o    Set path for JRE_HOME as eg. C:\Program Files\Java\jdk1.6.0_26\jre\
    o    Set path for CATALINA_HOME  as eg. C:\apache-tomcat-7.0.39-windows-x86\apache-tomcat-7.0.39

•    Setting up Servlet
    o    CREATE another environment variable as CLASSPATH
    o    Set the path for CLASSPATH as eg.        

C:\apache-tomcat-7.0.39-windows-x86\apache-tomcat-7.0.39\lib\servlet-api.jar

•    Reboot pc

•    Compile your first SERVLET with simple JAVAC command. [Eg. JAVAC HiServlet.Java]
•    If all steps performed correctly then the HiServlet.Java shall be generated as

FirstServlet.class.


=======================
YOUR FIRST SERVLET
=======================

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class HiServlet 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>Hi Servlet! www.wideit.blogspot.com From: Dibyendu</title>");
        out.println("</head>");
        out.println("<body>");
        out.println("<h1>Hi Servlet! www.wideit.blogspot.com From: Dibyendu</h1>");
        out.println("</body>");
        out.println("</html>");
    }
}

•    Run the compiled .class file on the WEB

     o  Place the HiServlet.class file into C:\apache-tomcat-7.0.39-windows-x86\apache-tomcat-7.0.39\webapps\examples\WEB-INF\classes\ folder

    o  Open the .XML file as web from c:\apache-tomcat-7.0.39-windows-x86\apache-tomcat-7.0.39\webapps\examples\WEB-INF\ folder with text editor (eg. notepad)

    o  Now Append or add following at the last of .XML file before </web-app>
 
    <servlet>
        <servlet-name>HiServlet</servlet-name>
        <servlet-class>HiServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>HiServlet</servlet-name>
        <url-pattern>/servlets/servlet/HiServlet</url-pattern>
    </servlet-mapping>

    o Save and Close the file.
    o Start Apache Server [Execute the .bat file as c:\apache-tomcat-7.0.39-windows-x86\apache-tomcat-7.0.39\bin\startup.bat]
    o Open any web browser
    o Navigate http://localhost:8080/examples/servlets/servlet/HiServlet on address bar
    o You should see the content of the class file.
    o Enjoy

===============================
How to set environment variable?
===============================
Platform : Windows

    In windows, right click on your "My Computer" Icon >> Properties >> Advanced Tab >>

Click on "Environment Variables" button >> Look for "System Variables" >> Now you may ADD or

Modify existing one;
Labels:

Comments

Post a Comment

Popular posts from this blog

Hi! I'm Java...

Java is a computer programming language. It enables programmers to write computer instructions using English based commands, instead of having to write in numeric codes. It’s known as a “high-level” language because it can be read and written easily by humans. Like English, Java has a set of rules that determine how the instructions are written. These rules are known as its “syntax”. Once a program has been written, the high-level instructions are translated into numeric codes that computers can understand and execute. Who Created Java? In the early nineties, Java was created by a team led by James Gosling for Sun Microsystems. It was originally designed for use on digital mobile devices, such as cell phones. However, when Java 1.0 was released to the public in 1996, its main focus had shifted to use on the Internet. It provided more interactivity with users by giving developers a way to produce animated webpages . Over the years it has evolved as a successful language for
1 comment
Read more

I'm the Server Operating System

Server Operating System A server operating system is software that was especially developed to serve as a platform for running multi-user computer programs, applications that are networked and programs critical to business computing. This type of operating system (OS) often comes bundled with the most common types of applications deployed in the client-server model, a term used to indicate the exchange of information between computers. For example, a hypertext transfer protocol (HTTP) or web server hosts or "holds" the text files, images files and scripts that work together to form a website. When someone connects to the Internet and types in a web address, the server that holds the files of the site delivers or "serves" the requested pages to the client computer or the machine that made the request. Frequently used applications in the client-server model handle operations for sharing files and printers across a network, hosting and serving web pages via the
Post a Comment
Read more

A Hit Count Using Java Servlet's Session Tracking

import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class SessionTracker extends HttpServlet {         public void doGet(HttpServletRequest req,HttpServletResponse res)         throws ServletException,IOException         {                res.setContentType("text/html");                PrintWriter out=res.getWriter();                HttpSession session=req.getSession(true);                Integer count=(Integer)session.getValue("tracker.count");                if(count==null)                {                         count=new Integer(1);                }else{                         count=new Integer(count.intValue()+1);                }                session.putValue("tracker.count",count);                out.println("<HTML><BODY><H1>SESSION TRACKING DEMO</H1>");                out.println("You've visited this page "+count+((count.intValue()==1)?" time.":"times."
2 comments
Read more