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HelloServlet for Servlet3.0

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Description: A sample HelloServlet for Servlet3.0 specification. No web.xml file is required in this case.
Jars: servlet-api.jar (spec version: 3.0, Implementation-Vendor: Apache Software Foundation)
URL: http://localhost:8080/TestServlet3/Hello?user=nav
Output: "Hello nav"

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  1. package com.nav.sample.servlet3;
  2.  
  3. import java.io.IOException;
  4. import java.io.PrintWriter;
  5.  
  6. import javax.servlet.ServletConfig;
  7. import javax.servlet.ServletException;
  8. import javax.servlet.annotation.WebServlet;
  9. import javax.servlet.http.HttpServlet;
  10. import javax.servlet.http.HttpServletRequest;
  11. import javax.servlet.http.HttpServletResponse;
  12.  
  13. /**
  14.  * Servlet implementation class HelloServlet3
  15.  */
  16. @WebServlet("/Hello")
  17. public class HelloServlet3 extends HttpServlet {
  18. 	private static final long serialVersionUID = 1L;
  19.  
  20. 	@Override
  21. 	public void init(ServletConfig config) throws ServletException {
  22. 		// TODO Auto-generated method stub
  23. 		super.init(config);
  24. 	}
  25.  
  26.     /**
  27.      * Default constructor. 
  28.      */
  29.     public HelloServlet3() {
  30.         // TODO Auto-generated constructor stub
  31.     }
  32.  
  33. 	/**
  34. 	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  35. 	 */
  36. 	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  37. 		PrintWriter pWriter = response.getWriter();
  38. 		pWriter.write("Hello "+request.getParameter("user"));
  39. 		pWriter.flush();
  40. 		pWriter.close();
  41. 	}
  42.  
  43. 	/**
  44. 	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
  45. 	 */
  46. 	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  47. 		// TODO Auto-generated method stub
  48. 	}
  49.  
  50. }

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