Geting null vaules with request.getParameter().....

Hello Experts,
I am sending a data from one jsp page to another using java script (document.form.txtbx.value = myData), on same page I cheked and got the correct value but on the next page, I am getting null vaues. I am giving my code just check out and give me suggetions..
On button click I am calling function jfun_submit(..,..,..,..)
function jfun_submit(mhCd , scheme , dhCd , dhnm , total , grantNo , noOfBill ,grossAmt , n_p , totAMT , dept , c_v , type , grossAmtQtr , addAmount , LOC , flagnext , neg_flg , neg_amt_alwd,tansend,appNosend,appDatesend , loc)
var getLink =mhCd+"|"+scheme+"|"+dhCd+"|"+total+"|"+grantNo+"|"+noOfBill+"|"+grossAmt+"|"+n_p+"|"+totAMT+"|"+dept+"|"+ c_v+"|"+type+"|"+grossAmtQtr+"|"+addAmount+"|"+"Budget"+"|"+flagnext+"|"+neg_flg+"|"+neg_amt_alwd+"|"+loc+"&Tan="+tansend+"&AppNo="+appNosend+"&AppDate="+appDatesend;
document.bill.getLink.value= "";
document.bill.getLink.value = getLink; //setting the value to the txtfield
alert("After Set : "+document.bill.getLink.value); //shows alert correctly.
var url="BillSchemeCheckX.jsp
document.bill.action=url;
document.bill.method="POST";
document.bill.submit();
{code}
and on next jsp page me writing following code
{code}
String getLink = request.getParameter("getLink");
out.println("GetLink Value : "+getLink);
{code}
the result displying GetLink value : null
Please help me out

What is the html for the formfield 'getLink'? I am guessing you have the id parameter set which makes this bit work 'document.bill.getLink.value = getLink;' but you dont have the name parameter set so your request.getParameter isnt working.

Similar Messages

Geting null values from request

hi!
i m producing this code through out.println() method in my page and then using java script
i am submiting this page to another page
<td width="56%"><textarea name="question_no_1"></textarea></td>
<input name="question_no_1_radio1" type="radio" value="radio"></td>
<td width="59%"> <textarea name="question_no_1_ans1"></textarea></td>
<input type="radio" name="question_no_1_radio2" value="radio"></td>
<td><textarea name="question_no_1_ans2"></textarea></td>
<input type="radio" name="question_no_1_radio3" value="radio"></td>
<td><textarea name="question_no_1_ans3"></textarea></td>
<input name="question_no_1_radio4" type="radio" value="radio"></td>
<td><textarea name="question_no_1_ans4"></textarea></td>
but when i submit it to the other page and try to retrieve value of parameter "question_no_1"
through the bellow statement it shows a null value but i have given a value previously by
typing a question in it
System.out.println("the Body Of The First Question Is "+request.getParameter("question_no_1"));
can anybody help me what is going on here.
also if i try to normaly submit first page (ie <form="form1" method="post" action="other_jsp_page.jsp"> ) then the statement in the next page gives me the correct value but
i have to submit the first paper through java script.
if u want to see full detail of my code then go to the following link
http://forum.java.sun.com/thread.jsp?thread=309254&forum=45&message=1237097
thanx in advance

OK, your problem is that you are not submmiting the values to the other page. When you do the
--> document.forms[0].submit();
in JavaScript, the form has to action defined
--> <form name="form1" method="" action="">
So, the page does nothing. The line following the submit just changes the location of the page, IT DOES NOT POST the values.
One solutions is the following:
1.- define an action for your form:
<form name="form1" method="POST" action="'save_paper.jsp">
2.- Then create a JavaScript function that validates the fields and simply return "true" if the form is correct, and false if there is a problem (just a little modification of the one you have).
3.- Then modify your submit button:
Instead of:
<input type="button" name="Save" value="Save" onClick="validateField()">
Try:
<input type="SUBMIT" value="Save" onclick="validateField();">

Request.getParameter is NULL from window.open form submit

Hi all,
We have one portlet application where a jsp page has a link which opens as a child window using the window.open function in javascript.
It has a form and some textboxes with a save submit button.When the save button is clicked the portlet processAction is called but when i try to set the renderrequest all the request.getParameters are null .I have tried both the ActionRequest and HttpServletRequest and both have nul values.
As a result me Save is failing since the request.getparametrs are null.I added the "save" as part of form action URL and its getting passsed but the other, i am unable to fetch.
My Form action is : <form name="saveEntries" id="saveEntries" action="<portlet:actionURL secure="true"/>&action=save&_pageLabel=ABC" method="post">
My process action code is :
Enumeration<String> parameters = request.getParameterNames();
          while(parameters.hasMoreElements()) {
               String parameter = parameters.nextElement();
               String[] values = request.getParameterValues(parameter);
               if(values != null && values.length > 1){
                    response.setRenderParameter(parameter, values);
               } else {
                    response.setRenderParameter(parameter, request.getParameter(parameter));
                    if(request.getParameter(parameter)!=null && "save".equalsIgnoreCase(request.getParameter(parameter))){
                         HttpServletRequest httpRequest = (HttpServletRequest) request.getAttribute("javax.servlet.request");
                         Enumeration parameterNames = httpRequest.getParameterNames();
                         Enumeration<String> httpparameters = parameterNames;
                         while(httpparameters.hasMoreElements()) {
                              String httpparameter = httpparameters.nextElement();
                              String[] httpvalues = httpRequest.getParameterValues(httpparameter);
                              if(httpvalues != null && httpvalues.length > 1){
                                   response.setRenderParameter(httpparameter, httpvalues);
                              } else {
                                   logger.debug("----------------->:ApproveTime else processAction = :Getting HTTP :parameter:"+parameter);
                                   logger.debug("----------------->:ApproveTime else processAction = :Getting HTTP :request.getParameter(parameter):"+request.getParameter(parameter));
                                   response.setRenderParameter(httpparameter, httpRequest.getParameter(httpparameter));
Any help is highly appreciated.

Hello,
One potential reason why it isn't working for you is that the Java Portlet specifications (JSR168 and JSR286) don't allow URLs to be manipulated once they are created with a a portlet:xxxURL tag. The reason for this is that the portlet container needs to be able to rewrite the URLs to properly go back through the portal framework (or over WSRP if running the portlet remotely) and to encode all the parameters needed. The portal framework could even change it from a URL to a Javascript action, where simply appending extra "&paramName=someValue" onto the end of the generated URL won't work. So this:
<form action="<portlet:actionURL secure="true"/>&action=save&_pageLabel=ABC" method="post">isn't legal by the portlet specification-- if you want to add parameters to the actionURL, you can by doing this:
<form action="<portlet:actionURL secure="true"><portlet:param name="action" value="save"/><portlet:param name="_pageLabel" value="ABC"/></portlet:actionURL>" method="post">which will add the parameters to the URL in a way that will always work with the portal framework.
One other thing to note- it looks like you're just trying to copy all of the action parameters in the request into render parameters in the response; this can be done much easier like this:
response.setRenderParameters(request.getParameterMap());Kevin

In Portal, request.getparameter return NULL (Sample Monthcalendar)

I used the sample monthcalendar. When i used it without integrated in portal, i can change month by month with ">>" button.
In the JSP File, there is a call to the P_CALDATE parameter
String l_inputDate = request.getParameter("P_CALDATE"); // Input Date.
When i put this JSP file as an URL Portlet, i can't navigate month by month. the function request.getParameter("P_CALDATE") return NULL, but in the URL i have the parameter:
http://hddms220.cg63.fr/servlet/page?_pageid=54,58,56&_dad=portal30&_schema=PORTAL30&P_CALDATE=2002-05-01.
Someone have an idea
Thanks in advanced

I have tested the sample with JSERV, and all works fine.
But if i wan't use OC4J/ORION to display a portlet how can i do it.
Thanks in advanced

In WL6.1 request.getParameter returns NULL for URL parameters that exist

          With the following URL, I get different results between WebLogic 4.5.1 and WebLogic
          6.1:
          http://phx-kmccarthy.medspecialists.net/tsweb/ParametersTest.jsp?apple=macintosh&tree&dog&country=USA
          Weblogic 6.1 returns:
          query string = apple=macintosh&tree&dog&country=USA
          apple = macintosh
          tree = null
          dog = null
          country = USA
          WebLogic 4.5.1 returns:
          query string = apple=macintosh&tree&dog&country=USA
          apple = macintosh
          tree =
          dog =
          country = USA
          here is the jsp...
          <%--
          * ParamtersTest.jsp which shows that empty parameters are ignored in WebLogic
          6.1
          --%>
          <%
          String apple, tree, dog, country;
          apple = request.getParameter("apple");
          tree = request.getParameter("tree");
          dog = request.getParameter("dog");
          country = request.getParameter("country");
          out.println("<br>query string = " + request.getQueryString());
          out.println("<br>apple = " + apple);
          out.println("<br>tree = " + tree);
          out.println("<br>dog = " + dog);
          out.println("<br>country = " + country);
          %>
          From the documentation on the getParameter() method:
          Returns the value of a request parameter as a String, or null if the parameter
          does not exist.
          In my opinion, not existing and being empty are different. Also, every other web
          application environment we've dealt with (including WebLogic 4.5.1) treats them
          as different. If the parameter doesn't have a value, (i.e. ...&tree&dog&...) then
          getParameter() returns the empty string, not null.
          As a result of this we have JSPs that break when running on 6.1.


Found the solution at last. Tomcat servlet container can't handle the chunked transfer-encoding that the J2ME Wireless Toolkit uses when you call outputstream.flush() in midlet. Using outputstream.close() instead of outputstream.flush() will avoid this problem for small requests. For all the codes in the articles on Http Post in Wireless Forum, don't use outputstream.flush() and it will run perfectly - Servlet's request.getParameter(parameterName) will work fine in doPost method.

Request.getParameter() always returns null

I have a html file and am trying to retrieve the values from a formin my servlet.
here is the html code:
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<h1><b>Add DVD</b></h1>
</head>
<body>
<form action="add_dvd.do" method="POST">
Title:<input type="text" name="title" />
Year:<input type="text" name="year" />
Genre: <select name='gselected'>
<option value='Sci-Fi'>Sci-Fi</option>
</select>
or enter new genre:<input type="text" name='gentered' value="" />
<input type="submit" value="Add DVD" />
</form>
</body>
</html>
and here is the servlet code:
public class AddDVDServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// System.out.println("in AddDVDServlet post method");
List errorMsgs = new LinkedList();
//retrieve form parameters
try{
String title = request.getParameter("title").trim();
String year = request.getParameter("year").trim();
*String gentered = request.getParameter("gentered");
String gselected = request.getParameter("gselected");
String genre="";
if("".equals(gentered))
genre = gselected;
else
genre = gentered;
// System.out.println("parameter retrieved");
if(!year.matches("\\d\\d\\d\\d"))
// System.out.println("year not 4 digit long");
errorMsgs.add("Year must be four digit long");
if("".equals(title))
// System.out.println("title not entered");
errorMsgs.add("Please enter the title of the dvd");
if("".equals(genre))
// System.out.println("genre not valid");zdf
errorMsgs.add("Enter genre.");
if(! errorMsgs.isEmpty())
//System.out.println("errors in entry ");
request.setAttribute("errors",errorMsgs);
// System.out.println("error attribute set in request");
RequestDispatcher rd = request.getRequestDispatcher("error.view");
rd.forward(request, response);
return;
//create DVDItem instance
DVDItem dvd = new DVDItem(title,year,genre);
request.setAttribute("dvdItem",dvd);
RequestDispatcher rd = request.getRequestDispatcher("success.view");
rd.forward(request, response);
catch(Exception e){
errorMsgs.add(e.getMessage());
request.setAttribute("errors",errorMsgs);
RequestDispatcher rd = request.getRequestDispatcher("error.view");
rd.forward(request, response);
e.printStackTrace();
System.out.println("exception:"+e);
why does getParameter always return null??? whats wrong?

I don't know. However, I suspect that because you have a tag with the same name as 'title', its causing a name conflict. Chnage the name to something else. If it works, then that's the likely explaination.

Request.getParameter("") values: Are they null or ""?

Hello:
I have a web page that links up to a MYSQL database. I use JSP files to process the database queries from an HTML form. However, I am having an issue after moving the code from MYSQL 5.0 and JDK 1.5 to a machine with MYSQL 4.X and JDK 1.4.X
I am enabling user to enter several pieces of search criteria that I, in turn, use to build the SQL syntax statement. And I test to see which HTML fields the user has entered something into so that the SQL only includes those where statements.
I first had the following to process the individual search criteria into SQL where statements:
String tester1 = request.getParameter("tester");
String tester = "";
if (tester1 != "") {
     tester += " tester like \"" + tester1 + "%\"" + " and ";
     } else {
tester += "";
so if the user enter "Tommy in the tester field as a search criterion this part of the SQL would be
tester like Tommy%
Then I build the select statment with only the where statements that the user is interested in (and provided search criteria on):
String syntax = "Select * from database where ";
String array[] = { tester, call_from, call_to, r_no, rec_no, date };
for (int counter=0;counter<array.length;counter++){
          if (array[counter] != "") {
          syntax += array[counter];
int a = 0;
int b = (syntax.length() - 4);
String syntax1 = syntax.substring(a, b);
so the above would create
Select * from database where tester like Tommy%
This worked on the previous machine. However, it no longer works on the machine with the older apis. So I have tried everything to weed out the blank database fields so they are not factored in the query (if they are they return nothing as these fields are required to be entered into the database). I tried this:
String tester1 = request.getParameter("tester");
String tester = "";
if ((tester1 != "") || (tester1 != null)){
     tester += " tester like \"" + tester1 + "%\"" + " and ";
     } else {
tester += "#";
. . . and then . . .
String syntax = "Select * from database where ";
String array[] = { tester, call_from, call_to, r_no, rec_no, date };
for (int counter=0;counter<array.length;counter++){
          if (array[counter] != "#") {
          syntax += array[counter];
int a = 0;
int b = (syntax.length() - 4);
String syntax1 = syntax.substring(a, b);
But no matter what I try the query that gets sent to the database is as follows:
Select * from qa_data where tester like "%" and called_from_1 = "" and call_to = "" and r_no = "" and rec_no = "" and (date >= "" and date <= "")
So I am at a loss. It appears that I am not testing for the correct value that the browser is sending to my JSP file when a user does not enter a value in the field. What other than "" and null are there? I have tested for one or the other and both. I am at a loss now as to what to do. I am only concerned with IE6/7 and Firefox 1.5
I output what the value being sent to the JSP file was and it was something like "The tester value is:". So, basically it isn't anything ("").
Can anyone help me here?

Rule #1 when comparing strings: use the equals() method, rather than == or !=
You only use == when checking for null, or checking to see if it is the same object.
if (tester1 == null || tester1.trim().equals("")){
// value is null/empty/spaces only
else {
// a value is present
}

Request.getParameter("_ROWKEY") returns null in JDev 3.2

My SubmitEditForm.jsp uses a bean which inherits from the EditCurrentRecord data web bean. In JDeveloper 3.1 'request.getParameter("ROWKEY")' in this JSP returns the rowkey for the record being edited, but in JDeveloper 3.2 'request.getParameter("_ROWKEY")' returns null. No modifications have bean made to the application - the working JDeveloper 3.1 app has only been compiled in JDeveloper 3.2. Can anyone help please?

Hi,
This exception is raised when the multipart/form-data parser has read the number of bytes specified by the Content-Length HTTP header, or tries to read past the end of the input stream, but has not parsed to the end of the message. As implied by the error text, this can happen for a couple of reasons.
Although its unlikely, it is possible for a client to sent an incorrect Content-Length header. However, we've so far only seen this with a user-written HTTP client. We have yet to see a browser send the wrong value.
The usual reason for this error is if a user hits the stop button while submitting a form. If the browser has already sent the HTTP header, including Content-Type, then the parser will try to read the entire message. However, this is going to fail, as the browser stops sending the request as soon as the stop button is pressed.
Finally, there is one more possible reason for this error, and that is if the request is somehow being 'munged' in some way between the browser and the servlet container.
To help us better understand what is happening here, can you supply
the following information:
- Does this problem happen consistently or occur only randomly?
- When it does happen, is it repeatable, or does it go away if the user hits the submit button again?
- Does it happen with certain HTML forms, any HTML form, or is it specific to the data entered into a pariticular form?
- Does it happen with any browser, or a specific version and/or implementation?
- What is your network configuration? For example, does the problem occur only when going through a proxy server or fire wall.
- Does it depend on network load? For example, does it happen only at heavy load times?
- What is you web server configuration, on what platform are you running it, and what JDK version are you using?
As I'm writing this, the TAR system is down for upgrades - my apologies if you've already supplied this information.
Regards,
Simon
null

Request.getParameter returns null - Converting webapp from Tomcat to oc4j

I support a simple web app that passes arguments via url context variables. For some reason it does not work in OC4J. When I use request.getContextPath() I see that the URL string only contains the webapps name, not the whole URL with parameters set.
BTW it is an OC4J cluster

*Name:             index.jsp
*Function:         This page is 1st url for WebApp
*Information:      This page is used as the home page for this application.
*Version:          1.0 (created on 2005-06-06)
* 2.0 052406 pge
%>
<%@ page pageEncoding="UTF-8"%>
<%@ page import="com.hp.itsm.api.*" %>
<%@ page import="com.hp.itsm.api.interfaces.*" %>
<%@ page import="java.text.Collator" %>
<%@ page import="java.util.*"%>
<%@ page contentType="text/html; charset=utf-8" %>
<%@ include file="include/variables_initialize.jsp" %>
<%@ include file="include/methods_global.jsp" %>
<%@ include file="include/methods_servicedesk.jsp" %>
<%
String login = request.getParameter("u");
String xxx = request.getContextPath();
//Service Call objects
ApiSDSession SDsession = null;
IPerson[] personList = null;
IAccount accountRequester = null;
Boolean bError = Boolean.FALSE; //Default to no errors found
List errMsgList = new ArrayList(); //Array of error messages
//Get account information
accountRequester = getAccount(SDsession, login);
if (accountRequester == null) {
bError = Boolean.TRUE;
errMsgList.add("Could not retrieve the accountRequester.");
}

Null value in Session vars and request.getParameter

We're migrating our application from iPlanet.
          Under iPlanet, when we looped through a resultset and set the values to
          session variables - it worked fine, even when a resultset value was null,
          but in WebLogic, I get the following error:
          java.lang.IllegalArgumentException: key/value is null
          Is there anyway to "turn this off" so it behaves like iPlanet?
          My second question is that we have many JSP's that check to see if a
          parameter is null in javascript:
          Here's the code:
          function onLoad() {
          document.form.elements[0].focus();
          // Check to see if the user is coming from a shortcut
          var imageName = "<%=request.getParameter("imageName")%>";
          if (imageName == "null") {
          selectTop("<%=select_image%>");
          } else {
          selectTop(imageName);
          <% if (tableIndex == 2) { %>
          loadShortcutIcon(13,100);
          <% } %>
          in iPlanet, when the parameter "imageName" is not in the URL, the javascript
          variable gets set to "null" - but in WebLogic, it is set to a blank string -
          "". Is there anyway to make this return null like iPlanet?
          Thanks,
          Matt


Hi,
the URL parameter is added just for the request to the page. When you press the command button then you issue a new request that does not have a URL parameter added. To work around this, you can use a PhaseListener that stores the URL request parameter in the session for later use
Frank

In JSP pages request.getParameter returns null

There are two jsp's,the first JSP has 1 textbox inside the form tag.We input the values in the textbox and submit.
Code :Ist jsp
<BODY>
<HEAD>
function validate()
document.add.submit();
</HEAD>
<FORM name="add" method="post" action=/dir/two.jsp" >
<TABLE width="37%" border="0" align="center" class="c4f3">
<TR>
<TD class="c4">Rating</TD>
<TD><input type=text name="rating"></TD?
</TR>
<TR>
<TD align=center><INPUT type="button" name="submitadd" value="Submit" onClick="validate()" </TD>
</TR>
</TABLE>
</FORM>
</BODY>
After the submit it goes to the 2nd JSP page .
code:2nd Jsp
<%
String Rating=request.getParameter("rating");
out.println(" Rating "+Rating);
%>
The 2nd JSP pages gets the values by request.getParameter.When I use method='post' in Ist JSP ,even if I enter values in the textbox, it prints null. But when I give method="get" , it prints the value.
Pls let me know if there is any problem in the code or its the problem due to webserver configuration.Also suggest the solution to over come this problem.
Thanks

If I'am right you have misplaced the opening body-tag of your first jsp-page.
The opening body-tag should follow after the closing head tag .
The structure of your HTML-code should look like this:
<html>
<head>
</head>
<body>
</body>
</html>

Reading Null Values From Request Object

For a proof-of-concept, I wrote a mini program that has 2 files. File #1 is main.html. There's a javascript function called addNewRowToThisTable that isn't displayed but it basically allows the user to create as many rows in the table as user desires. When the "Submit" button is clicked the file ReadIt.jsp is called and it's supposed to display on the first and last names of the people who had the checkbox for that row checked. The best way to illustrate the problem I'm having is through an example. Let's say there are 3 rows:
[x] Alan Anderson [Add New Row]
[ ] Bob Brady [Add New Row]
[x] Carl Chadwick [Add New Row]
[Submit]
Let's assume that only rows 1 and 3 are clicked. After the form is submitted the JSP will print...
firstNameArr .length = 3
lastNameArr .length = 3
isSelectedArr.length = 2
firstNameArr[0] = Alan
lastNameArr[0] = Anderson
firstNameArr[1] = Bob
lastNameArr[1] = Brady
Unfortunately firstNameArr[1] and lastNameArr[1] should be "Carl", and "Chadwick" respectively. I know the reason why it's failing is because my program relies on the array index of the "isSelected" field to perfectly match up with the "firstName" and "lastName" fields. It's unreliable because if the checkbox for a row is not checked then it won't show up in the JSP String array isSelectedArr. I'm not really sure how to get around this problem. I have 2 ideas at the beginning of solutions but I'm not sure how to follow through on either and I'm also not sure if either is the proper approach to take. My guesses are...
1) There's some way in JSP to use "getParameterValues('isSelected')" to retrieve the full array of "isSelected" items regardless of whether or not they're checked. That would guarantee that my arrays would match up correctly. Unfortunately, I haven't been able to find this.
2) Maybe I can put in some sort of ID in the "isSelected" field that would relate the checkbox to the rest of the data in the row. The problem with this is that I've got a dynamic # of rows due to my addNewRowToThisTable method.
So the bottom line is that I'm thoroughly stumped. If anyone can offer advice I'd be very grateful.
main.html
<html><head><title></title></head><body>
<form method="get" action="ReadIt.jsp">
<table>
<tr>
     <td><input type="checkbox" name="isSelected" /></td>
     <td><input type="text" name="firstName" /> </td>
     <td><input type="text" name="lastName" /></td>
     <td><input type="button" value="Add New Row" onClick="addNewRowToThisTable(this)" />
</tr>
<tr>
     <td colspan=4><input type="submit" value="submit"></input></td>
</tr>
</table>
</form>
</body></html>
ReadIt.jsp
<%
String[] isSelectedArr = request.getParameterValues("isSelected");
String[] firstNameArr = request.getParameterValues("firstName");
String[] lastNameArr = request.getParameterValues("lastName");
if (firstNameArr != null) System.out.println("firstNameArr .length = " + firstNameArr .length);
if (lastNameArr != null) System.out.println("lastNameArr .length = " + lastNameArr .length);
if (isSelectedArr != null) {
     System.out.println("isSelectedArr.length = " + isSelectedArr.length);
     for (int i=0; i < isSelectedArr.length; i++) {
          System.out.println("firstNameArr["+i+"] = " + firstNameArr);
          System.out.println("lastNameArr["+i+"] = " + firstNameArr[i]);
%>

it's sort of a kludge, but try this:
your javascript function adds new for fields that get submitted to the servlet. name the checkboxes uniquely with a patterm with said function, say isSelected-1, isSelected-2, isSelected-3... now also name the first and last name fields the same way. fname-1, fname-2, fname-3... lname-1,lname-2,lname-3.
when you get to the page that is supposed to match them up, go through all the request parameters looking for those that start with "isSelected-" take the last char (the index), convert it to an int, and then from your request do:
String first = request.getParameter("fname-" + indexThatWasFound);
          String last = request.getParameter("lname-" + indexThatWasFound);in looping over the request for each index recovered from the searching of the request for the isSelected-n values, you will get the matching first and last name.
I TOLD you it was a kludge.

How to get Int value from request.getParameter()?

Hi all,
I have a integer value which is passed from one page to another page.
i am geting this value in the next page using
request.getParameter().
Eg.
Suppose value of "i" in page1 is 32, i pass this as hidden variable to next page.
<input type="hidden" Value="<%=i%>" NAME="limit">
in page2, i fethch this value to a variable by name "limit"
String limit=request.getParameter("limit");
but, since value stored in limit is int, i can't assign it to string.
i can't use request.getParameter for int values.
How to solve my problem.
I know it is simple,
Pls. help me
Regards
ASh
String limit=request.getParameter("limit");

String limitSTR = request.getParameter("limit");
int limit = -1;
if (limitSTR != null) limit = Integer.parseInt(limitSTR);

JSP request.getParameter bug

i try the following code for receive Parameters from jsp.
<% String name=request.getParameter("Name"); %>
but when Name TextField(in HTML) is empty and i want to check
for none empty field with (if) instruction with following code..
if(name ==null ) //somecodes..
this instruction not run and programs continue .

It's not a bug.
<%
String name=request.getParameter("Name");
if (name == null) {
//what to do if parameter does not exist
//e.g.: a checkbox not checked
} else if (name.trim().equals("")) {
//what to do if parameter exists but is 'empty'
//e.g.: an text input field with no non-whitespace characters
//NOTE: if you want leading and trailing spaces to be
// considered values, remove the .trim() from the condition
} else {
//there is a value.. do with it as you will
%>

Jsp request.getparameter doesn't get querystring values

We have recently deployed our jsp application which was running successfully on ias8i apache jserv into the 8.1.7 JVM and configured the mod_ose on the Oracle HTTP server every thing seems to be fine except the following case.
Here we are accepting the userid,password from a jsp and submiting to the same jsp for action on submit we are reading a combination of jsp form feilds and url querystrings strangely we are able to get values only for the form feilds and querystrings return null.
The same peice of code works fine on apache jserv implementation.
Any clues please write to me.
<SCRIPT Language="JavaScript">
function check_password()
document.Login.action ="problem.jsp?tab=YES&nSessionId="+document.Login.sessionid.value+"&nUserId=" + document.Login.userid.value;
document.Login.target = "_top";
document.Login.method = "post";
document.Login.submit();
</SCRIPT>
<%
userid = request.getParameter("userid");
password = request.getParameter("password");
tab = request.getParameter("tab");
%>
<form name="Login" Border="0" TopMargin="0" LeftMargin="0" Marginheight="0" Marginwidth="0">
<table>
<tr>
<td class="FORMHEADERLEFTB"><b> Login</td>
<td class="FORMHEADERLEFT">:</td>
<td><input TYPE="TEXT" NAME="userid" SIZE="25" VALUE="<%=userid%> MAXLENGTH="10"></td>
</tr>
<tr>
<td class="FORMHEADERLEFTB"> Password</td>
<td class="FORMHEADERLEFT">:</td>
<td><input TYPE="password" NAME="password" SIZE="25" VALUE="<%=password%>" MAXLENGTH="10" onChange="check_password()"></td>
</tr>
</table>
<input type="hidden" name="sessionid" value="999999">
</form>
Thanks
suresh
null

How are you retrieving the parameter values? I am able to retrieve parameters successfully using the following simple testcase:
untitled1.jsp:
<form method="post" action="servlet1">
<P>Username:
<input type="text" name="un"/>
</P>
<P>Password:
<input type="text" name="pw"/></P>
<P>
<input type="submit" value="Submit"/>
</P>
</form>
servlet1.java: (copy and paste from doGet() to doPost() method depending on value of form method in untitled1.jsp)
String un = request.getParameter("un").toString();
String pw = request.getParameter("pw").toString();
out.println(un);
out.println(pw);
Please test this and let me know your results and the differences with what you are trying to do.
Regards,
Lynn
Java Tools Team

Geting null vaules with request.getParameter().....

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