Re: Spring java Controller get correct data from button when "apply" button is clicked but not pressing the <Enter> key

marisa lee <>
Fri, 9 Apr 2010 19:54:28 -0700 (PDT)
On Apr 9, 4:32 pm, albert kao <> wrote:

The group button in my form is set to "unack".
The Spring ParameterizableViewController ( receive
the correct group "unack" when the "apply" button is clicked.
However, the HwController receive the null group when the cursor is
moved to the text box and press the <Enter> key.
Only the data from the button is received incorrectly, the other form
data are received correctly.
Please help so that the HwController will receive the correct group
when the <Enter> key is pressed.
I use Spring 2.5.x to implement JSP.
Eclipse console output:
12:56:52,187 INFO com.mycomp.hw.monitoring.war.HwController:57 -
groupStr unack
12:56:52,187 INFO com.mycomp.hw.monitoring.war.HwController:60 -
group unack
12:56:52,187 INFO com.mycomp.hw.monitoring.war.HwController:71 -
rowsPerPageStr 40
12:56:52,187 INFO com.mycomp.hw.monitoring.war.HwController:80 -
rowsPerPage 40
12:57:14,156 INFO com.mycomp.hw.monitoring.war.HwController:57 -
groupStr null
12:57:14,156 INFO com.mycomp.hw.monitoring.war.HwController:60 -
group all
12:57:14,156 INFO com.mycomp.hw.monitoring.war.HwController:69 -
acked null
12:57:14,156 INFO com.mycomp.hw.monitoring.war.HwController:71 -
rowsPerPageStr 60
12:57:14,156 INFO com.mycomp.hw.monitoring.war.HwController:80 -
rowsPerPage 60

Hw.jsp file:
<script type="text/javascript">
  function setgroup() {
    var group = 'all';
    var elem = document.getElementsByName("radio");
    for (var i = 0; i < elem.length; i++) {
       if (elem[i].checked) {
            group = elem[i].value;

    var rowsPerPageElem = document.getElementById("rowsPerPage");
    var rowsPerPage = rowsPerPageElem.value;
    var chkelem = document.getElementById("ok");
    var ok = chkelem.checked;

    window.location = "Hw?rowsPerPage=" + rowsPerPage + "&ok=" =

+ ok +

"&group=" + group;

<form name="form">
    <c:set var="allchecked" value=""/>
    <c:set var="ackchecked" value=""/>
    <c:set var="unackchecked" value=""/>

    <c:if test="${group == 'all'}">
      <c:set var="allchecked" value="checked"/>
    <c:if test="${group == 'ack'}">
      <c:set var="ackchecked" value="checked"/>
    <c:if test="${group == 'unack'}">
      <c:set var="unackchecked" value="checked"/>

  <input type="radio" name="radio" value="all" ${allchecked}
onClick="setgroup()"> All
  <input type="radio" name="radio" value="ack" ${ackchecked}
onClick="setgroup()"> Acknowledged
  <input type="radio" name="radio" value="unack" ${unackchecked}
onClick="setgroup()"> Unacknowledged

<form name="hwform">
  <c:set var="unhwchk" value="" />
  <c:if test="${ok}">
    <c:set var="unhwchk" value="checked" />
  <br><br><input type="checkbox" name="ok" id="ok" ${unhwchk}
  <br>Rows Per Page<input type="text" name="rowsPerPage"
id="rowsPerPage" value="${rowsPerPage}" onsubmit="setgroup()"/>
  <input type="button" value="Apply" onClick="setgroup()"><br>
public ModelAndView handleRequestInternal(HttpServletRequest request,
    HttpServletResponse response) throws Exception {
  String group = "all";
  String groupStr = request.getParameter("group");"groupStr " + groupStr);
  if (groupStr != null)
    group = groupStr;"group " + group);


The form is changed to the following.
Now pressing the <Enter> key and clicking the "Apply" button has the
same result - the button value is changed from "ack" to "all".
However, I expect that the button value should not change.
<form name="hwform" onsubmit="setgroup()">
  <c:set var="unhwchk" value="" />
  <c:if test="${ok}">
    <c:set var="unhwchk" value="checked" />
  <br><br><input type="checkbox" name="ok" id="ok" ${unhwchk}/>HW
  <br>Rows Per Page<input type="text" name="rowsPerPage"
id="rowsPerPage" value="${rowsPerPage}"/>
  <input type="submit" value="Apply"/><br>

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