java scope
user_3924995
plain_text
5 months ago
3.3 kB
2
Indexable
index jsp ************************************************************************** <%@ page import="java.util.ArrayList" %> <%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %> <!DOCTYPE html> <html> <head> <title>First Page</title> </head> <body> <% ArrayList<String> listOfAnimals = new ArrayList<>(); listOfAnimals.add("dog"); listOfAnimals.add("horse"); listOfAnimals.add("rabbit"); getServletContext().setAttribute("animals", listOfAnimals); ArrayList<String> availableAnimals = (ArrayList<String>)getServletContext().getAttribute("animals"); %> <form action="second.jsp" method="post"> Name: <input type="text" name="name"> </br> Select yout favourite animal: </br> <select name="animal"> <% for (String a : availableAnimals){ %> <option><%=a%></option> <% } %> </select> <br/> <input type="submit" value="Select animal"> </form> </body> </html> ************************************************************************** second jsp ************************************************************************** <%@ page import="java.util.ArrayList" %><%-- Created by IntelliJ IDEA. User: hallgato Date: 11/26/2024 Time: 2:22 PM To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Second page</title> </head> <body> <% if(request.getParameter("name") != null) { session.setAttribute("username", request.getParameter("name")); session.setAttribute("favoriteAnimal", request.getParameter("animal")); } if(request.getParameter("updateAnimal") != null){ session.setAttribute("favoriteAnimal", request.getParameter("updateAnimal")); } String username = (String)session.getAttribute("username"); String animal = (String)session.getAttribute("favoriteAnimal"); ArrayList<String> availableAnimals = (ArrayList<String>) getServletContext().getAttribute("animals"); %> <h2>Welcome, <%=username%> to my website</h2> <h3>Your favorite animal is: <%=animal%></h3> <form action="second.jsp" method="post"> Change your favourite animal: </br> <select name="updateAnimal"> <% for (String a : availableAnimals){ %> <option><%=a%></option> <% } %> </select> <br/> <input type="submit" value="Select animal"> </form> </body> </html> hyperlink is like a get method(doGet in servlet) ************************************************************************** servlet ************************************************************************** package com.example.practice; import java.io.*; import jakarta.servlet.http.*; import jakarta.servlet.annotation.*; @WebServlet(name = "helloServlet", value = "/hello-servlet") public class HelloServlet extends HttpServlet { private String message; public void init() { message = "Hello World!"; } public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException { response.setContentType("text/html"); // Hello PrintWriter out = response.getWriter(); out.println("<html><body>"); out.println("<h1>" + message + "</h1>"); out.println("</body></html>"); } public void destroy() { } }
Editor is loading...
Leave a Comment