47 lines
1.5 KiB
Java
47 lines
1.5 KiB
Java
package com.baeldung.servlets;
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import javax.servlet.RequestDispatcher;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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@WebServlet(name = "FormServlet", urlPatterns = "/calculateServlet")
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public class FormServlet extends HttpServlet {
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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String height = request.getParameter("height");
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String weight = request.getParameter("weight");
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try {
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double bmi = calculateBMI(Double.parseDouble(weight), Double.parseDouble(height));
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request.setAttribute("bmi", bmi);
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response.setHeader("Test", "Success");
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response.setHeader("BMI", String.valueOf(bmi));
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RequestDispatcher dispatcher = request.getRequestDispatcher("index.jsp");
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dispatcher.forward(request, response);
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} catch (Exception e) {
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response.sendRedirect("index.jsp");
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}
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}
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@Override
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// do something else here
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}
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private Double calculateBMI(Double weight, Double height) {
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return weight / (height * height);
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}
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} |