Newbie request.getParameter(String) issue

I'm having an issue setting a boolean value in a bean based off a string from request.getParameter(). I've created a small example to illustrate what I want to happen:
testForm.jsp:
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"/>
    <title>testForm</title>
</head>
<body><form method="POST" action="testWork.jsp">
      <input type="hidden" name="hiddenTest" value="1"/>
      <input type="submit" name="submitTest" value="Submit"/>
    </form></body>
</html>testWork.jsp:
<jsp:useBean id="test" scope="session"
             class="thistestapp.testClass"/>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"/>
    <title>testWork</title>
</head>
<body>
<%
out.print("<p>" + request.getParameter("hiddenTest") + "</p>" );
// Great it's sending "1"
test.setTestB(request.getParameter("hiddenTest"));
//So when I set this in the bean I should get true
out.print("<p>" + test.getTestB() + "</p>" );
//False? Not nice!!
test.setTestB("1");
//Alright there must be an issue with my code in the bean, so hardcode a
//"1" in. I should still get false.
out.print("<p>" + test.getTestB() + "</p>" );
//True?? I hate you.
%>
</body>
</html>testClass.java:
package thistestapp;
public class testClass {
    private Boolean testB;
    public void setTestB(String testB) {
        if ( testB == "1"){
           this.testB = true;
        else{
           this.testB = false;
    public Boolean getTestB() {
        return testB;
}So, I want when the bean is sent a "1" from the form to set the bean value to true. I however can't get that to happen. I'm sure there's something I'm missing.
TIA.
Joe

? if ( testB == "1"){
Standard beginner's error. If you want to test if two strings contain the same text, use the equals() method. Like this:if ( testB.equals("1")){Your code tests whether the two sides of the == operator refer to the same object. It's possible and likely for two different strings to contain the same value, which is what you are really interested in.

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I seem to be losing the information after the amperstand.. and not sure why..
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"sample1.xml" is not recognised as a parameter (for obvious reasons). It should probably look something like:
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Hi,
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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
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I first had the following to process the individual search criteria into SQL where statements:
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if (tester1 != "") {
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so if the user enter "Tommy in the tester field as a search criterion this part of the SQL would be
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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++){
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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)){
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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++){
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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 ("").
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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
}

Retriving only hidden parameters from request.getParameter

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You can use the getParameterNames() or getParameterMap() methods from javax.servlet.ServletRequest to get all the parameters in the request. Even if they're dynamically generated, and you don't know the names in advance, these methods will ferret them out.
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How to get Int value from request.getParameter()?

Hi all,
I have a integer value which is passed from one page to another page.
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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
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String limitSTR = request.getParameter("limit");
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In JSP pages request.getParameter returns null

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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:
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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.
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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)
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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.

Submitting request.getParameter value on page submit

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<%
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%>
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JSP request.getParameter bug

i try the following code for receive Parameters from jsp.
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if(name ==null ) //somecodes..
this instruction not run and programs continue .

It's not a bug.
<%
String name=request.getParameter("Name");
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//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
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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.
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The same peice of code works fine on apache jserv implementation.
Any clues please write to me.
<SCRIPT Language="JavaScript">
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document.Login.action ="problem.jsp?tab=YES&nSessionId="+document.Login.sessionid.value+"&nUserId=" + document.Login.userid.value;
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</SCRIPT>
<%
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password = request.getParameter("password");
tab = request.getParameter("tab");
%>
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<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>
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</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

Unable get complete filepath from jsp page using request.getParameter()

Hey all,
i am actually trying to get the selected file path value using request.getParameter into the servlet where i will read the (csv or txt) file but i dont get the full path but only the file name(test.txt) not the complete path(C:\\Temp\\test.txt) i selected in JSP page using browse file.
Output :
FILE NAME : TEST
FILE PATH : test.txt
Error : java.io.FileNotFoundException: test.txt (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:106)
at java.io.FileReader.<init>(FileReader.java:55)
at com.test.TestServlet.processRequest(TestServlet.java:39)
at com.test.TestServlet.doPost(TestServlet.java:75)
JSP CODE:
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>DEMO SERVLET</title>
</script>
</head>
<body>
<h2>Hello World!</h2>
<form name="myform" action="TestServlet" method="POST"
FILE NAME : <input type="text" name="filename" value="" size="25" /><br><br>
FILE SELECT : <input type="file" name="myfile" value="" width="25" /><br><br>
<input type="submit" value="Submit" name="submit" />
</form>
</body>
</html>
Servlet Code :
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, FileNotFoundException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
String filename = request.getParameter("filename");
out.println(filename);
String filepath = request.getParameter("myfile");
out.println(filepath);
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet TestServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet TestServlet at " + request.getContextPath() + "</h1>");
if (filepath != null) {
File f = new File(filepath);
BufferedReader br = new BufferedReader(new FileReader(f));
String strLine;
String[] tokens;
while ((strLine = br.readLine()) != null) {
tokens = strLine.split(",");
for (int i = 0; i < tokens.length; i++) {
out.println("<h1>Servlet TestServlet at " + tokens[i] + "</h1>");
out.println("----------------");
out.println("</body>");
out.println("</html>");
} finally {
out.close();
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
Needed Output :
FILE NAME : TEST
FILE PATH : C:\\Temp\\test.txt
Any suggestions Plz??

As the [HTML specification|http://www.w3.org/TR/html401/interact/forms.html] states, you should be setting the enctype to multipart/form-data to be able to upload files to the server. In the server side, you need to process the multipart/form-data binary stream by parsing the HttpServletRequest#getInputStream(). It is a lot of work to get it to work flawlessly. There are 3rd party API's around which can do that for you, such as [Apache Commons FileUpload|http://commons.apache.org/fileupload] (carefully read the User Guide how to use it).
You can also consider to use a Filter which makes use of the FileUpload API to preprocess the request so that you can continue writing the servlet code as usual. Here is an example: [http://balusc.blogspot.com/2007/11/multipartfilter.html].

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.

Newbie request.getParameter(String) issue

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