JSP vs. JavaScript

In my project I have a very complex form and it takes several steps (screens) to fill out all data.
So I wonder if I should create a JavaScript object, implement drawing of theese screens on the client part and submit data only when everything completed
or
create a JSP for every screen and save every screen into database one by one.
So, could you, please, tell me pluses and minuses of both choices based on your experience.
Thanks.

Both sound expensive.
The first on the client. And what happens if JavaScript is disabled?
The second makes a lot of database hits.
Why not go with an inbetween solution where you have multiple pages, submitting their data to the server and save the information on the server using a JavaBean. You can access the bean through the session object, just make sure you give it session scope when you first create/reference it on the initial JSP. Then once the final form is submitted collate your data and submit it all in one go to the database, you can do this in a number of ways - on the JSP, via a servlet or via Java classes.
Maybe you should take a look at Apache's Struts dosumentation as it might come in handy if you will be doing a lot of this. Also check out some of the documents on MVC architecture, that will give you an idea why its beneficial rather than just my humble opinion.

Similar Messages

Set jsp from javascript

I have three "div" tags in index.jsp ,
<div id='header'></div>
<div id='body'></div>
<div id='footer'></div>
Now when window is loaded i want other jsp page to be set in the "body" div tag of index.jsp from javascript
My javascript code
function invokeJSP(){
document.getElementById('body').innerHTML="<jsp:include page='test.jsp'>'";
when I am including this code in <head > part of index.jsp its working the problem is if at all
In test.jsp
if i try to include this line
<% = request.getParameter("name")%>
its giving an error like "unterminated literal string" in javascript console
Can anyone help me how to set the jsp from javascript
Sorry for my bad english.This is the first time I am posting the forum
thanks
hema

hi
Thanks for the response
but i have closed the tag in my program. Have u ever tried to invoke jsp from javascript in this way if it works plz help me.
thanks hema

Jsp in javascript

hi
can we use jsp in javascript
for eg:
<script>
if(flag)
<% respone.sendRedirect("--"); %>
</script>
or is there any other way of doing this type of things
this is only an example.
thx
-jay

You can use JavaScript in a JSP. JavaScript usually runs on client. You can also use Java in a JSP. Here is sample code:
<%@ page import="java.util.*" %>
<%
Calendar cal = Calendar.getInstance();
     int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
     int hourOfDay = cal.get(Calendar.HOUR_OF_DAY);
     int minuteOfHour = cal.get(Calendar.MINUTE);
     if (((dayOfWeek == 7) & (hourOfDay == 23) & (minuteOfHour > 29)) || ((dayOfWeek == 1) & (hourOfDay == 0) & (minuteOfHour < 31))) { %>
<jsp:forward page="file:///M:/Studio/projects/som/html/IC_0019.htm" />
<% } %>

JSP language javascript

What is the problem?
<%@ page language="javascript" %>
<%
var i;
for ( i=1; i<5; i++ )
out.println("JSP whit JavaScript <br>");
%>

What is the problem?
<%@ page language="javascript" %>
<%
var i;
for ( i=1; i<5; i++ )
out.println("JSP whit JavaScript <br>");
%>The <% and %> tags indicate a Java scriptlet.
"var" is JavaScript syntax, the rest is Java.
out.println is a Java method.
If you want to do your loop in JavaScript then it would
be like this:
<script>
for ( var i = 1; i < 5; i++ )
document.writeln("JSP whit JavaScript <br>");
</script>

How to access variables across JSP and JavaScript?

Hi,
I have some .js files and in those files, some of the methods need to access to the variables that I'd declare in the jsp files. How do I do it?
Anne

You can do it this way, but I'm not sure if this is what you had in mind.
Say you had a java variable called XString. And you wanted to display
the value of XString in a javascript Alert. Here's how:
<html>
<body>
<% String XString = "Hi There!"; %>
</body>
<script language="javascript">
alert("<%=XString%>");
</html>Hope This Help,
P.

How to pass values from JSTL to JSP or Javascript ?

Hi All,
Is it possible to share or use the variables which are declared are used by JSTL in JSP expression or scriplet code and in Java Script.
Example:
This Works:
<fmt:set var="test" value="JSTL" />
<fmt:out value="${test}" />
But, this gives error:
<% out.println(test) %>
And passing the value of variable 'test' to Java Script code also gives error.
How to use JSTL variables in JSP and in Javascript ?
Yours,
Sankar.B

<% out.println(pageContext.getAttribute("test") %>
If your tags use a different scope then you'll nee to access them accordingly e.g this will work
<c:set var="test" value="JSTL" scope="session" />
<c:out value="${test}" />
<% out.println(session.getAttribute("test")); %>

Problem in JSP with JavaScripts, which works perfectly in TOMCAT

The peice of code below works without any problem in tomcat, which assign some values from a form named "frmOffice" which is in another jsp. In 9iAS it seems the values are not found. Also it says 'error on page'. What could be the reason. Please respond as soon as possible. Thanks.
<SCRIPT Language="JavaScript">
function Opennewwindow(url,size)
window.open (url,"Newwindow",size);
function NewContact()
var UserID =
parent.parent.frmMenubar.document.frmOffice.UserID.value;
var GroupID =
parent.frmFolderHead.document.fomFolderHead.FolderID.value;
var intDomainID =
parent.parent.frmMenubar.document.frmOffice.DomainID.value;
Opennewwindow('../../modules/contact/Contact_New.jsp?
UserID='+UserID+'&GroupID='+GroupID+'&Email=&DomainID='+intDomainID,'scrollbars=1,width=680,height=190');
</SCRIPT>

Mr. Ahmed,
Excuse-me by my bad english.
I experienced the same problem when surrounded my scripts with comment caracters:

If this is your case, simply uncomment it and the script will work fine.

WL vs. WL-express and JSP vs. javascript/SQL

folks-
i am trying to convince a certain party to
disband a web-based job tracking system being
written in ASP, javascript, html, css and SQL.
it will be hosted on MS webserver running NT.
i am trying to convince them to use JSP and
WL express. i have done two years of EJB
component work on weblogic, however, i have not
done work with JSP or thin-clients. i was mostly
business-logic.
anyway i have some questions and need some
direction. i already know JSP is better than
ASP/javascript etc. because:
* ASP is proprietary. ditto for VBscript
* with an IDE creating JSP is easy and JSP
automatically creates servlets which is way
faster than by hand
* JSP is JAVA based and hence benefits from
all the portability pluses of JAVA
but here are the more difficult questions:
* why is WL express better than an MS
web server? (not including WL market share
and size. after all MS can claim that)
* since WL express does not have an EJB
container, how do you access the database?
via JDBC? does one just have JDBC code
floating around?
* since there is no EJB container how does
one separate presentation from logic from
data access? this is a major downside of
javascript, html, css and SQL etc.
* if a web app grows beyond JSP with WL express
into the need for an EJB container, i would
think that most of the app needs to re-written
as business-logic must be refactored into EJBs
and all JDBC code will be replaced by container
managed beans. this sounds a like a lot of
rework.
* isn't JSP slower than javascript as the
servlet and hmtl code is bounced back and
force across the network?
with respect to architecture, scalability,
and robustness what are the downsides to an
MS webserver and non-JSP coding?

* since WL express does not have an EJB
container, how do you access the database?
via JDBC? does one just have JDBC code
floating around?
Use JDO or an OR-mapper or embed JDBC into your own data access classes.
* since there is no EJB container how does
one separate presentation from logic from
data access? this is a major downside of
javascript, html, css and SQL etc.
Presentation=JSP
Logic=Servlet
Data access=JDO or similar
* if a web app grows beyond JSP with WL express
into the need for an EJB container, i would
think that most of the app needs to re-written
as business-logic must be refactored into EJBs
and all JDBC code will be replaced by container
managed beans. this sounds a like a lot of
rework.
You should be able to tell up front if it a tx-intensive app that requires
WLS.
* isn't JSP slower than javascript as the
servlet and hmtl code is bounced back and
force across the network?
They aren't exclusive. For dynamic pages, use Javascript on the front end,
JSP on the back.
* with respect to architecture, scalability,
and robustness what are the downsides to an
MS webserver and non-JSP coding?
In the real world, and for most apps, while Java has the architectural edge,
they both have similar scalability and similar robustness. MS gives you no
choice though, and you rewrite every time they see a new buzzword. You can't
leave MS-land without abandoning almost everything. You can leave WLS in a
week if you have to.
It's an investment. Invest wisely.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"shane miller" <[email protected]> wrote in message
news:[email protected]...
folks-
i am trying to convince a certain party to
disband a web-based job tracking system being
written in ASP, javascript, html, css and SQL.
it will be hosted on MS webserver running NT.
i am trying to convince them to use JSP and
WL express. i have done two years of EJB
component work on weblogic, however, i have not
done work with JSP or thin-clients. i was mostly
business-logic.
anyway i have some questions and need some
direction. i already know JSP is better than
ASP/javascript etc. because:
* ASP is proprietary. ditto for VBscript
* with an IDE creating JSP is easy and JSP
automatically creates servlets which is way
faster than by hand
* JSP is JAVA based and hence benefits from
all the portability pluses of JAVA
but here are the more difficult questions:
* why is WL express better than an MS
web server? (not including WL market share
and size. after all MS can claim that)
* since WL express does not have an EJB
container, how do you access the database?
via JDBC? does one just have JDBC code
floating around?
* since there is no EJB container how does
one separate presentation from logic from
data access? this is a major downside of
javascript, html, css and SQL etc.
* if a web app grows beyond JSP with WL express
into the need for an EJB container, i would
think that most of the app needs to re-written
as business-logic must be refactored into EJBs
and all JDBC code will be replaced by container
managed beans. this sounds a like a lot of
rework.
* isn't JSP slower than javascript as the
servlet and hmtl code is bounced back and
force across the network?
with respect to architecture, scalability,
and robustness what are the downsides to an
MS webserver and non-JSP coding?

Jsp and javascript problem

I have a JSP page with a table of n rows. Each row has the option of having
          a dropdown list appear on that particular row. The user should have the
          ability to make a selection from the drop down list and have the page change
          to the correct page automatically or it can allow the user to change and
          have them click on a link that passes the value of the select box as a
          parameter to the proper page.
          The problem is that each row CAN NOT be in it's own form. The action for
          the current form is NOT the action I want the select box to use.
          I can't seem to figure out how to get the value of the select box in
          javascript passed as a parameter using a JSP variable.
          Example code:
          <form method="post" action="/index.jsp">
          <table>
          <tr>
          <td> Remove Row? </td>
          <td> View Options? </td>
          <td> Name </td>
          </tr>
          <tr>
          <td> <input type=checkbox name='<%=rowNumber %>' value='<%=
          someCheckboxValue %>'> </td>
          <td> <select name=selectOptions>
          <option value="option 1">option1</option>
          <option value="option 2">option2</option>
          <option value="option 3">option 3</option>
          </select>
            View Option
          </td>
          <td> <%= rowName %> </td>
          </tr>
          <tr>
          <td colspan="3"> <input type=button name='UpdateExampleForm'
          value='Submit'> </td>
          </tr>
          </table>
          </form>


actually i am taking menus from database in file ourmenu.jsp
and i have another file called menu.js which displays the menus on browser
menu.js is the file which i have downloaded from net
and i want to use at it is but with a difference that it should display the menus which r coming from database
in file ourmenu.jsp i have saved the menus in array so can anyone tell me how to refer them in my .js file.
i have tried with foll. code::
var aUsername =new array();
<% i=0;
while (padtemp[i] != null)
%>
aUsername[<%= ++i%>] = "<%= padtemp[i] %>";
in .js file but i am getting no o/p on browser
i have tried with runat=server while including the .js file in .jsp file but its not working too.
can anyone help please
thanks in advance

Using JSTL variables in JSP or Javascript. Possible ?

Hi All,
Is it possible to share or use the variables which are declared are used by JSTL in JSP expression or scriplet code and in Java Script.
Example:
This Works:
<fmt:set var="test" value="JSTL" />
<fmt:out value="${test}" />
But, this gives error:
<% out.println(test) %>
And passing the value of variable 'test' to Java Script code also gives error.
How to use JSTL variables in JSP and in Javascript ?
Yours,
Sankar.B

By default, JSTL variables are kept in servlet
attributes. Default is to store it in the page
context. You can make it request/session/application
scope as required by an attribute of the set tag.Hi there,
Can anyone advise how to access JSP variables in JSTL?
Can it be done as the same method through request/session/application scope?
Thnks...

How to do validation in jsp using javascript

how to do validation in jsp using javascript

The same way you do with any HTML page.
Catch the onclick/onsubmit event, do your validation in javascript and then allow/cancel the action as required.
However this is javascript validation only - javascript can never call JSP code.

Validating forms in jsp using javaScript

Hi all i'm trying to validate this form with javeScript. i was testing it with just the <input type=text name= file> first. it works but after the alert message it still posts to writeXML......
i tried putting the fuction valid() after the <form> tag but it still posts it to writeXML.jsp.......can anyone help me please........What i want to do is make sure that something is typed in all the forms befor posting to writeXML..Thanx
<html>
<head> <title>Create MultipleChoice Questions</title> </head>
<script language="JavaScript">
function valid(form) {
     if(form.file.value == "")
     alert("Please enter the file name")
</script>
<body bgcolor="#cccccc">
<% int count = 0;
String number = request.getParameter("nOfq");
int qNumber = Integer.parseInt(number); %>
<form action="writeXML.jsp" method="POST">
<center>
     <table bgcolor="silver" border="1" width="75%">
     <tr align="center"><td><b>Type in the Name of your Questionnaire here eg. BlackHistory.      Dont leave any spaces between letters</b><br>
     <textarea name="file" rows="1" cols="25"></textarea><br>
     </td></tr>
<% for(int i=1;i<qNumber+1; i++) { %>
<%count++;%>
     <tr align="center" bgcolor="#336699"><td><b>QUESTION <%= count %>: </b><br>
     </td></tr>
     <tr align="center"><td><b>ENTER QUESTION:</b><br>
     <textarea name=<%="questionText"+i%> rows="5" cols="65"></textarea><br>
     </td></tr>
     <tr align="center"><td><b>CHOICE 1:</b><br>
     <textarea name=<%="choice_1"+i%> rows="2" cols="50"></textarea><br>
     </td></tr>
     <tr align="center"><td><b>CHOICE 2:</b><br>
     <textarea name=<%="choice_2"+i%> rows="2" cols="50"></textarea><br>
     </td></tr>
     <tr align="center"><td><b>CHOICE 3:</b><br>
     <textarea name=<%="choice_3"+i%> rows="2" cols="50"></textarea><br>
     </td></tr>
     <tr align="center"><td><b>CHOICE 4:</b><br>
     <textarea name=<%="choice_4"+i%> rows="2" cols="50"></textarea><br><br><br>
     </td></tr>
     <tr align="center" bgcolor="#679995"><td><b>CORRECT ANSWER:</b><br>
     <textarea name=<%="cAnswer"+i%> rows="2" cols="50"></textarea><br><br><br>
     </td></tr>
<% } %>
<tr>
<td align="center"><input type="submit" name="next" value="NEXTT" onClick="valid(this.form)">
<td align="center"><input type="hidden" name="qCount" value="<%=count+1%>">
</td></tr>
</table>
</center>
</form>
</body>
</html>

this Corrected code works perfectly
<html>
<head> <title>Create MultipleChoice Questions</title> </head>
<script language="JavaScript">
function valid(form) {
if(form.file.value == ""){
alert("Please enter the file name");
frmValid.file.focus();
}else{
     frmValid.action="writeXML.jsp";
     frmValid.submit();
</script>
<body bgcolor="#cccccc">
<% int count = 0;
int qNumber=-1;
String number = clearNull(request.getParameter("nOfq"));
if(! number.equals(""))
qNumber = Integer.parseInt(number);
%>
<form name="frmValid" method="POST" >
<center>
<table bgcolor="silver" border="1" width="75%">
<tr align="center"><td><b>Type in the Name of your Questionnaire here eg. BlackHistory. Dont leave any spaces between letters</b><br>
<textarea name="file" rows="1" cols="25"></textarea><br>
</td></tr>
<% for(int i=1;i<qNumber+1; i++) { %>
<%count++;%>
<tr align="center" bgcolor="#336699"><td><b>QUESTION <%= count %>: </b><br>
</td></tr>
<tr align="center"><td><b>ENTER QUESTION:</b><br>
<textarea name=<%="questionText"+i%> rows="5" cols="65"></textarea><br>
</td></tr>
<tr align="center"><td><b>CHOICE 1:</b><br>
<textarea name=<%="choice_1"+i%> rows="2" cols="50"></textarea><br>
</td></tr>
<tr align="center"><td><b>CHOICE 2:</b><br>
<textarea name=<%="choice_2"+i%> rows="2" cols="50"></textarea><br>
</td></tr>
<tr align="center"><td><b>CHOICE 3:</b><br>
<textarea name=<%="choice_3"+i%> rows="2" cols="50"></textarea><br>
</td></tr>
<tr align="center"><td><b>CHOICE 4:</b><br>
<textarea name=<%="choice_4"+i%> rows="2" cols="50"></textarea><br><br><br>
</td></tr>
<tr align="center" bgcolor="#679995"><td><b>CORRECT ANSWER:</b><br>
<textarea name=<%="cAnswer"+i%> rows="2" cols="50"></textarea><br><br><br>
</td></tr>
<% } %>
<tr>
<td align="center"><input type="submit" name="next" value="NEXTT" onClick="valid(this.form)">
<td align="center"><input type="hidden" name="qCount" value="<%=count+1%>">
</td></tr>
</table>
</center>
</form>
</body>
</html>
<%!
private String clearNull( String sField ) {
return ( sField == null ) ? "" : sField;
%>

JSP , bean, JavaScript

I have a page that uses a bean, myBean. There is a method inside myBean named getOccupation() and a property String Occupation. the getOccupation returns the Occupation to the page. The Occupation String is gotten from a database.
I also have a form in the jsp page named myForm and a select field named Occupation.
The idea is, get the Occupation from the database, return it to the jsp and make the select select the corresponding to the String gotten from the database.
I'm trying to mix javascript with java here
javascript to compare the current values of the Options in select to the Occupation and select it but it keeps giving me the error.
<script>
blabla javascript
<% myBean.getOccupation()%>
</script>
That gives an error, anyone can help?
thx
Dewi

I think the below code might help you.....
I tried to reproduce your problem.....
<%!
     String selectValue = "1";
%>
<html>
     <head>
          <title>Test Page </title>
          <script language="JavaScript">
               function as(){
                    obj = document.form1.test;
                    for (i = 1; i < obj.length; i++){
                         if (obj.value == '<%=selectValue%>')
                              obj[i].selected = true;
          </script>
     </head>
     <body onload="as()">
     <form name="form1">
          <select name="test">
               <option value="">---------select----------</option>
               <option value="1">1</option>
               <option value="2">2</option>
               <option value="3">3</option>
               <option value="4">4</option>
          </select>
     </form>
     </body>
</html>
I hope this works.....

How to call jsp in javascript

i am trying to show a confirm dialog and when the user click on the ok button, i want it to call a method inside my .java file. what i want to do is something like this:
<script>
var ans = confirm("Are u sure you want to over write file);
if(ans)
//call the method doUpload
else
//do nothing
</script>
/////////////.java///////////////
public class FileUploadBean{
public void doUpload(HttpServletRequest req, HttpServletResponse res){

Something along these lines ought to do what you want:
<html>
<body>
<form name='foobar' action='foobar.jsp'>
<script language='Javascript'>
function askim() {
  if (confirm('Is you sure?')) {
    document.foobar.submit();
  } else return false;
</script>
<input type='button' value='Submit' onClick='askim()'>
</form>
</body>
</html>
Your mileage may vary.
But the idea here is that the Javascript merely submits the form if the user clicks "OK" on the confirmation pop-up. Otherwise, nothing happens. The form is submitted to a JSP file which accepts the request, does something (such as call your Java class), then prints out some HTML in response.

Populate combo in jsp without javascript?

hai all,
can u tell me how can i populate combo in jsp, is it possible without javascript?

Quite easily, in pseudo code <%
     List myList = (List)session.getAttribute("theList");
%><select name="myOptions"><%
     for (items in the list)
          %><option value="<%= item.value %>"><%= item.label %></option><%
%>
     </select>

How to set JavaBean in JSP using JavaScript function

Hello,
When a user clicks on an item, I want to execute a JavaScript function. Within that function, I want to set specific JavaBeans (<jsp:setProperty... />) within my JSP page.
Can anyone tell me how to do this or where I can find examples on how to set JavaBeans in a JSP page using JavaScript?
Thanks.
Pat

try this:
your.jsp
<html>
<SCRIPT>function buttonClick()
{document.compform.submit();}
</SCRIPT>
<body>
<form name=compform method=post action='your.jsp'>
<%
//write your code which you want to execute once the button is submitted
String submit;
submit=request.getParameter("mysubmit");
if ((submit != null) && (! submit.equals("")))
%>
<input type=hidden name=mysubmit value="submit">
<input type=button value=add onclick='buttonClick()'>
</form></body></html>

JSP vs. JavaScript

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