I am trying to add products (in viewProduct.jsp) to a basket (basket.jsp).
I'm pretty new to JSP. I know it's done by using an appropriate hyperlink to basket.jsp in viewProduct.jsp. I've written a long line in <p> tags in viewProduct.jsp where I'd like the hyperlink to be. Thanks
viewProduct.jsp
<%# page import="shop.Product"%>
<jsp:useBean id='db'
scope='session'
class='shop.ShopDB' />
<html>
<head>
<title>My Shop</title>
</head>
<body>
<%
String pid = request.getParameter("pid");
Product product = db.getProduct(pid);
// out.println("pid = " + pid);
if (product == null) {
// do something sensible!!!
out.println( product );
}
else {
%>
<div align="center">
<h2> <%= product.title %> by <%= product.artist %> </h2>
<img src="<%= product.fullimage %>" />
<p> <%= product.description %> </p>
<p> -------------------------- link goes here -------------------</p>
</div>
<%
}
%>
</body>
</html>
basket.jsp
<%# page import="java.util.Collection,
java.util.Iterator"%>
<jsp:useBean id='basket'
scope='session'
class='shop.Basket'
/>
<%
String empty = request.getParameter("emptyBasket");
if (empty!=null) {
basket.clearBasket();
}
String item = request.getParameter("addItem");
basket.addItem(item);
%>
<html>
<body>
<% Collection items = basket.getItems();
for (Iterator i = items.iterator(); i.hasNext(); ) {
out.println( "<p>" + i.next() + "</p>" );
}
%>
<p> Order total = <%= basket.getTotalString() %>
<%
if ( basket.getTotal() > 0) {
%>
<form action="order.jsp" method="post">
<input type="text" name="name" size="20">
<input type="submit" value="Place Order" />
</form>
<form action="basket.jsp" method="get">
<input type="hidden" name="emptyBasket" value="yes">
<input type="submit" value="Empty Basket" />
</form>
<%
}
%>
</body>
</html>
As you can see from your basket.jsp if you have a parameter called addItem, then it will be added to the basket
so how about
<p> <%= product.description %> </p>
<!-- use pid -->
<a href="basket.jsp?additem="<%=pid%>><%= product.description %></a>
Although use of JSTL tags would be nicer.
See http://www.tutorialspoint.com/jsp/jsp_standard_tag_library.htm
I am trying to retrieve data from SQL query executed and validate the result with input I am making within form. I keep getting no return, in other words, it just returns empty value. Could you please help me with this matter or if this not the correct solution then how can I retrieve this value to perform validation.
My validation should match the inputed user with database user.
<%# page language="java" contentType="text/html; charset=US-ASCII"
pageEncoding="US-ASCII"%>
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%# taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql"%>
<!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=US-ASCII">
<title>Insert title here</title>
<script>
function validateForm() {
var x = document.forms["input"]["user"].value;
var y = document.forms["input"]["pwd"].value;
if (x == null || x == "" && y==null || y=="" ) {
alert("Username and Password must be filled out");
return false;
}
}
function validateUser() {
var x = document.forms["input"]["user"].value;
var variableFromServer = "${names.FIRST_NAME}";
document.write('<p>'+variableFromServer+'</p>');
if (x != variableFromServer) {
alert("Username is not right"+variableFromServer);
return false;
}
}
</script>
</head>
<body>
<sql:setDataSource var="db" driver="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:********" user="******" password="******"/>
Connected
<sql:query dataSource="${db}" var="query_select">
Select * from User_Details
</sql:query>
<c:forEach var="names" items="${query_select.rows}" >
inside loop : <p>${names.FIRST_NAME}</p>
</c:forEach>
<form action= "/BilalWebtier/login.jsp" name="input" action="demo_form_action.asp" method="post" onsubmit="return validateForm() & validateUser();">
Username: <input type="text" name="user">
Password: <input type="password" name="pwd">
<input type="submit" value="Login">
<br/>
<br/>
</form>
<button type="button">Password Reset</button>
</body>
</html>
You should change it to the click event
<form action= "/BilalWebtier/login.jsp" name="input" action="demo_form_action.jsp" method="post" >
Username: <input type="text" name="user">
Password: <input type="password" name="pwd">
<input type="submit" value="Login" onclick="return validateForm() && validateUser();">
<br/>
<br/>
</form>
I have created two jsp pages in which I am able to get the response of my input. Below are my 2 jsp pages. Also I would like to get a response from android java class to the same Index1.jsp.(For eg: If I am sending one string to Index1.jsp I would to get the response as same string).
Index.jsp
<form action="index1.jsp" method="POST">
<input type="checkbox" name="maths" checked="checked" /> Maths
<input type="checkbox" name="physics" /> Physics
<input type="checkbox" name="chemistry" checked="checked" /> Chem
<input type="submit" value="Select Subject" />
</form>
Index1.jsp
<%
Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()) {
String paramName = (String)paramNames.nextElement();
out.print("<tr><td>" + paramName + "</td>\n");
String paramValue = request.getParameter(paramName);
out.println("<td> " + paramValue + "</td></tr>\n");
}
%>
I am creating small web apps and I am facing the following problem. I have 2 JSPs and when I click the submit button, it repeats the value every time. What I want is that when I click on the submit button it should give only the corresponding value.
index.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%#page import="java.io.*,java.util.*" %>
<!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=ISO-8859-1">
<title>Class Video</title>
</head>
<body>
<form action="second.jsp" method="post">
<table>
<%
File f=new File("C:/Users/SHAKTI/Desktop/video");
File[] list=f.listFiles();
if(list.length!=0){
String s[]=new String[list.length];
for(int i=0;i<list.length;i++){
s[i]=list[i].toString();
String fi=list[i].getName();
%>
<tr><td><%=fi %></td>
<td><input type="text" name="file" value="<%=s[i] %>">
</td>
<td><input type="submit" name="play" value="Play"></td>
</tr>
<%}}
else{
%>
<tr>
<td>There is no any files in the database...</td>
</tr>
<%
}
%>
</table>
</form>
</body>
</html>
second.jsp
<form action="" method="post">
<%
response.setHeader("Cache-Control","no-cache");
response.setHeader("Pragma","no-cache");
response.setDateHeader ("Expires", 0);
String id=request.getParameter("file");
out.println("id = "+id);
%>
<input type="submit" name="submit" value="submit>
</form>
First Jsp : Set Value in First Page
request.setAttribute("name",somevalue);
Second Jsp : Retrieve it in Second page
request.getAttribute("name")
use queryString
URl: http://myaddress.com/xyz?name=jill&sex=f
String someName = request.getParameter("name") ;
String sex = request.getParameter("sex") ;
One way is to use session as described by javaBeginner.
you can also create a from on the fly and submit it.
write a function similar to this one and use it in your success:
function submitValues(url, params) {
var form = [ '<form method="POST" action="', url, '">' ];
for(var key in params)
form.push('<input type="hidden" name="', key, '" value="', params[key], '"/>');
form.push('</form>');
jQuery(form.join('')).appendTo('body')[0].submit();
}
There are many options to pass a value from one jsp to another, Here are some
1) Adding that as a hidden variable and specifying the value
<input name="file" type="hidden" value=""/>
2)Adding it to the session and retrieving the session variable
session.setAttribute("file", value);
3)Passing that as a queryParameter
http://......one.jsp?file=""
It is beacause you are iterating the loop here,
for(int i=0;i<list.length;i++){
s[i]=list[i].toString();
String fi=list[i].getName();
so it will print the last element from the loop, to get the name u clicked on the button try this .. Change this line as
<input type="text" name="file" value="<%=s[i] %>">
as,
<td><input type="button" class="btn" data-reqno=value="<%=s[i] %>" value="file name">
And handle it using jQuery like this , so that you can pass the value to next JSP,
<script type="text/javascript">
$(document).ready(function () {
$(".btn").click(
function() {
var selectedFileName = $(this).attr("data-reqno");
var urlToApprove = "/yourApp/req/filename?name=" + selectedFileName;
}
);
});
</script>
And also try to avoid Scriptlets in JSP , you can use JSTL or El for the same purpose .
Hope it helps !!
there are many method to pass variable such as
session.setAttribute()
session.getAttribute
action "xxx.jsp?variable=1"
Since I am using get I expect to see the submitted values appended to the queryString but instead all I see is the URL of the servlet being called with nothing added at the end.
<form id="editClassList" name="editClassList" method="get" action="EditClassList">
<%
HashMap<Integer,String> classes = new HashMap<Integer,String>();
classes = (HashMap<Integer,String>) request.getAttribute("classes");
%>
<%
if(classes.size()==0){ %>
<label><input class="small-link" type="text" id="add-this-class"
size="42" value="" /></label>
<%
}
%>
<%
Set<Integer> classIds = new HashSet<Integer>();
classIds = classes.keySet();
Iterator<Integer> itr = classIds.iterator();
while(itr.hasNext()){
int nextId = (Integer)itr.next();
%>
<label><input class="small-link" type="text" id="<% out.print(nextId); %>"
size="42" value="<% out.print(classes.get(nextId)); %>" />
</label>
<img id="add-class" src="images/add.png" width="16" height="16" /><br />
<label><input class="small-link" type="text" id="class-to-add"
size="42" value="" /></label>
<%
}
%>
<label><input type="submit" id="save-class-btn" value="Save Class(es)" /></label>
</form>
A try: your input tags lacks the name attribute ?
<input name="data" class="small-link" type="text" id="class-to-add" size="42" value="" />