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RequestDispatcher added to servlet

This commit is contained in:
Shubham Aggarwal 2016-11-28 09:36:42 +05:30
parent 0a9a0e819a
commit aa2285f3b4
5 changed files with 81 additions and 22 deletions
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5
javax-servlets/classes/artifacts/ServletmavenExample_war_exploded/META-INF/MANIFEST.MF Normal file
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@ -0,0 +1,5 @@
Manifest-Version: 1.0
Built-By: shubham
Created-By: IntelliJ IDEA
Build-Jdk: 1.8.0_91

7
javax-servlets/classes/artifacts/ServletmavenExample_war_exploded/WEB-INF/web.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
</web-app>

26
javax-servlets/classes/artifacts/ServletmavenExample_war_exploded/index.jsp Normal file
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@ -0,0 +1,26 @@
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Calculate BMI</title>
</head>
<body>
<form name="bmiForm" action="calculateServlet" method="POST">
<table>
<tr>
<td>Your Weight (kg) :</td>
<td><input type="text" name="weight"/></td>
</tr>
<tr>
<td>Your Height (m) :</td>
<td><input type="text" name="height"/></td>
</tr>
<th><input type="submit" value="Submit" name="find"/></th>
<th><input type="reset" value="Reset" name="reset" /></th>
</table>
<h2>${bmi}</h2>
</form>
</body>
</html>

31
javax-servlets/src/main/java/com/root/FormServlet.java
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@ -1,5 +1,6 @@
package com.root;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
@ -7,13 +8,37 @@ import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet(name = "FormServlet", urlPatterns = "/informationServlet")
@WebServlet(name = "FormServlet", urlPatterns = "/calculateServlet")
public class FormServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userName = request.getParameter("userName");
String userPlanet = request.getParameter("userPlanet");
String height = request.getParameter("height");
String weight = request.getParameter("weight");
try {
Double bmi = calculateBMI(Double.parseDouble(weight), Double.parseDouble(height));
request.setAttribute("bmi", bmi);
RequestDispatcher dispatcher = request.getRequestDispatcher("index.jsp");
dispatcher.forward(request, response);
} catch (Exception e) {
response.sendRedirect("index.jsp");
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// do something else here
}
private Double calculateBMI(Double weight, Double height) {
return weight / (height * height);
}
}

34
javax-servlets/web/index.jsp
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@ -1,29 +1,25 @@
<%--
Created by IntelliJ IDEA.
User: shubham
Date: 26/11/16
Time: 8:52 PM
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Form</title>
<title>Calculate BMI</title>
</head>
<body>
<form action="informationServlet" method="POST">
<form name="bmiForm" action="calculateServlet" method="POST">
Name:<input type="text" name="userName"/><br/><br/>
Planet:
<select name="userPlanet">
<option>Mercury</option>
<option>Venus</option>
<option>Mars</option>
</select>
<br/><br/>
<input type="submit" value="Submit"/>
<table>
<tr>
<td>Your Weight (kg) :</td>
<td><input type="text" name="weight"/></td>
</tr>
<tr>
<td>Your Height (m) :</td>
<td><input type="text" name="height"/></td>
</tr>
<th><input type="submit" value="Submit" name="find"/></th>
<th><input type="reset" value="Reset" name="reset" /></th>
</table>
<h2>${bmi}</h2>
</form>
</body>