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Pressing the enter key receive extra invalid data

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posted 13 years ago

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Pressing the enter key at the jsp page receive extra invalid data at the ProdController.java.
The alertgroupStr receive "unack" as expected.
However, I do not understand why alertgroupStr receive the extra invalid "null" later.
Debug log:
11:14:52,187 DEBUG com.systems.monitoring.war.ProdController:54 - alertgroupStr unack
...
11:14:52,187 DEBUG com.systems.monitoring.war.ProdController:54 - alertgroupStr null

ProdController.java:

Jsp page:

<?xml version="1.0" encoding="UTF-8" ?>
<%@ include file="/WEB-INF/jsp/includeTaglibs.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
                      "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" type="text/css" media="all"
	href="/static/css/style.css" />
<link rel="stylesheet" type="text/css" media="all"
	href="/static/css/tablist.css" />
<script type="text/javascript" src="/static/js/prototype.js"></script>
<script type="text/javascript" src="js/util.js"></script>
<title>Hw Monitoring
<%@page import="org.springframework.beans.*" %>
<%@page import="org.springframework.context.*" %>
<%@page import="org.springframework.web.servlet.support.*" %>
</title>

</head>

function init()
  {
  }
  
  function isEmpty(v) {
	 return (v == null) || (v.length == 0);
  }

function isInteger(v) {
     return !isEmpty(v) && !/[^\d]/.test(v);
  }

if (checked)
		 elem.style.color = 'green';
	 else
         elem.style.color = 'red';
   }  
  
  function refresh() {
     window.location.reload(true);
  }

function timedRefresh(timeoutPeriod) {
    setTimeout("refresh();", timeoutPeriod);
  }
</script>

<c:set var="untagchk" value="" />  
  <c:if test="${includingUnassignedTags}">
    <c:set var="untagchk" value="checked" />
  </c:if>
      
  <input type="checkbox" name="includingUnassignedTags" id="includingUnassignedTags" ${untagchk} onClick="setUnassignedTags()"><spring:message code="alert.unassignedtags"/>
      
  <spring:message code="alert.number"/>${totalalerts}
<c:if test="${numPages > 0}">
        <spring:message code="alert.page"/>${pageNumber} <spring:message code="alert.of"/> ${numPages}
</c:if>
<table class="resizable">
	<thead>
		<tr>
			<th><spring:message code="alert.id"/></th>
			<th><spring:message code="alert.date"/></th>
			<th><spring:message code="alert.time"/></th>
			<th><spring:message code="alert.reader"/></th>
			<th><spring:message code="alert.asset"/></th>
			<th><spring:message code="alert.description"/></th>
			<th><spring:message code="alert.alert"/><br></br>
			    <spring:message code="alert.acknowledgement"/></th>
		</tr>
	</thead>
	<tbody>
		<c:set var="boxindex" value="0" />
		<c:forEach items="${alerts}" var="alert">
			<tr>
				<c:forEach items="${alert}" var="alertvalue" begin="0" end="5"
					step="1">
					<td>${alertvalue}</td>
				</c:forEach>
				
				
				<c:set var="spanid" value="span${alert[0]}" />
				
				<c:if test="${alert[6] == 'checked'}">
					<c:set var="format_start" value="<span id='${spanid}' class='fg-green'>" />
				</c:if>
				<c:if test="${alert[6] == 'unchecked'}">
					<c:set var="format_start" value="<span id='${spanid}' class='fg-red'>" />
				</c:if>
				<td><c:set var="boxindex" value="${boxindex+1}" />
				    <c:set var="boxid" value="box${alert[0]}" />
				    <c:out value="${format_start}" escapeXml="false" />
				<input type="checkbox" name="checkboxChoice" id="${boxid}"
					value="${alert[0]}"
					${alert[6]} onClick="postCheckbox(${alert[0]}, '${boxid}', '${spanid}');">
			    	<spring:message code="alert.ack"/>
				</span></td>
			</tr>
		</c:forEach>

</tbody>
</table>
</form>

<c:if test="${numPages > 1}">
    <div class="pageNumber">
      <span class="noLink"><spring:message code="alert.page"/> </span>
      <c:forEach begin="1" end="${numPages}" varStatus="status">
        <c:choose>
        <c:when test="${status.index==pageNumber}"><span class="noLink">${status.index}</span></c:when>
        <c:otherwise><a href="Prod?page=${status.index}&alertgroup=${alertgroup}&includingUnassignedTags=${includingUnassignedTags}&rowsPerPage=${rowsPerPage}">${status.index}</a></c:otherwise>
        </c:choose>
      </c:forEach>
    </div>
  </c:if>

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