How to make a servlet using eclipse ,apache tomcat [ J2EE PART 5 ]

1.Setting up eclipse for using j2ee ,installing j2ee plugins , webtools ,in existing eclipse [ j2ee part 1 ] 2.Setting up eclipse for using Apache Tomcat/7.0.12 [ j2ee part 2 ] 2.1.Setting up apache tomcat in linux-eclipse [ J2EE part 2.1 ] 3. Apache tomcat 7 404 error in Eclipse Solution [j2ee part 3] 4.How to simply run a HTML file in apache tomcat 7 using elipse [ J2EE PART 4 ] 5.How to make a servlet using eclipse ,apache tomcat [ J2EE PART 5 ] 6.How to make a JSP using Netbeans ,apache tomcat [ J2EE PART 6 ] 7.How to jump from first jsp page to another jsp page ,apache tomcat [ J2EE PART 7 ] 8.How to redirect first jsp page to another jsp page using login page ,apache tomcat [ J2EE PART 8 ]

A Servlet is a Java class in Java EE that conforms to the Java Servlet API, a protocol by which a Java class may respond to HTTP

Right click on myfirstservletproject→New→Other

Select Servlet→Next→

Type java package:com.mamstricks.myfirstservlet→Class name:Firstservlet→

→Select /FirstServlet from URL mapping→EDIT→

→Type"path" in addition to "/FirstServlet"→/FirstServletpath
Its just for understand the URL mapping ,its not necessary

Select Option rounded→Finish

Now we get this class
have a look at screenshot and focus on to yellow marking and red rectangle window

Now type this line as shown in picture

  
System.out.println("From doget method ");
        
    

i will tell you more about doget method  in following tutorials, Dont worry :-)
Run the servlet by right clicking myservlet.java→run as server

→Click→yes

Now this message     System.out.println("From doget method ");  printed in log
So how to print "hello" in browser?
Just write this this two line

       

PrintWriter pw=response.getWriter();
pw.println("Hello");
        
    

So what is this "PrintWriter" ,"getWriter" doing?

PrintWriter pw = response.getWriter();
getWriter() simply returns a "PrintWriter" object that can send character text to the client.The PrintWriter uses the character encoding returned by getCharacterEncoding(). If the response's character encoding has not been specified as described in getCharacterEncoding (i.e., the method just returns the default value ISO-8859-1), getWriter updates it to ISO-8859-1.


Now refresh Your page pointed by arrow

We have done !!!!!!!!!!!

   Please Dont forget to suggest & correct my language  :P
if you have any doubt please comment ...

Posted in: J2EE,servlet