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Saturday, 28 February 2015

How To Create Servlet

How to create Servlet or call servlet

step 1:

create a index.jsp file or index.html file and make a form.

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="Display" method="post">
first name:<input type="text" name="firstName"><br>
last name:<input type="text" name="lastName" ><br>
<input type="submit" value="submit">
</form>
</body>
</html>

Step 2:

Now create a servlet display.java

Display.java


package com.jsp.test;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Display extends HttpServlet{

   
   
    /**
     *
     */
    private static final long serialVersionUID = 5346650776384140650L;

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
          String firstNAme=request.getParameter("firstName");
          String lastName=request.getParameter("lastName");
          PrintWriter out=response.getWriter();
          out.print("Welcome"+"  "+firstNAme+"  "+lastName);
          out.close();
    }

}

Step 3:

configure web.xml

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>JSP</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
 
   <servlet>
    <servlet-name>Display</servlet-name>
    <servlet-class>com.jsp.test.Display</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>Display</servlet-name>
    <url-pattern>/Display</url-pattern>
  </servlet-mapping>
 
</web-app>



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