我正在使用JSF PrimaFaces。在我的页面上，有几个动作（例如搜索项目等）。此外，项目列表显示在下方。
我使用带有分页属性的<p:datatable>创建了列表。以下是我的问题：
当我点击搜索按钮时，一切正常。
当我将页数从10更改为25时，将显示25个项目，这是预期的行为。
但是，当我在更改项目数量后单击搜索按钮时，会显示以下消息＆＃39; xml解析错误，未找到任何元素＆＃39;。
我使用了Firefox的调试工具，它显示了
＆＃39; 500内部服务器未找到错误＆＃39;
对此有任何帮助将不胜感激。如果需要，我会发布代码。
提前致谢。
以下是代码：
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:int="http://java.sun.com/jsf/composite/intComp"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:p="http://primefaces.org/ui"
template="./template.xhtml">
<ui:define name="title">
<h:outputText value="Px List"/>
</ui:define>
<ui:define name="help">
This page provides list of existing items.
<ul>
<li>${shoppingController.appProps['RTN']}</li>
<li>Long Name</li>
</ul>
The shopping item is sorted by alphabetically.
</ui:define>
<ui:define name="sideMenu">
<int:setupSideMenu FI="${shoppingController.appProps['FI']}" batchShown="${currentUser.userType eq '0'}" />
</ui:define>
<h:outputText value="${param}"></h:outputText>
<ui:define name="content">
<c:choose>
<c:when test="${not empty param.txtShoppingCode and not empty param.shoppingGroupId}">
<c:set var="pageData" value="${shoppingController.getPxCodesOfShoppingByGroupIdAndPxName(param.shoppingGroupId, param.txtShoppingCode)}"/>
</c:when>
<c:when test="${not empty param.txtShoppingCode and empty param.shoppingGroupId}">
<c:set var="pageData" value="${shoppingController.getPxCodesOfShoppingByPartnerIdAndPxName(param.cuid, param.txtShoppingCode)}"/>
</c:when>
<c:when test="${not empty param.shoppingGroupId}">
<c:set var="pageData" value="${shoppingController.getPxCodesOfShoppingItemByGroupId(param.shoppingGroupId)}"/>
</c:when>
<c:otherwise>
<c:set var="pageData" value="${shoppingController.getPxCodesOfShoppingByPartnerId(param.cuid)}"/>
</c:otherwise>
</c:choose>
<h2 align='center'>Shopping Item List</h2>
<table style="text-align: center; width: 100%; border: 0;">
<tbody>
<f:view rendered="${not empty message}">
<tr>
<td colspan="3" style="text-align: center; vertical-align: top; height: 20px;">
<div class="errorMessage">${message}</div>
</td>
</tr>
</f:view>
<tr align="right">
<td colspan="5" align="right">
<form id="frmAddCode" method="post" action="shoppingItemAdd.xhtml" >
<input class="ButtonStyle"
type="button"
id="btnAddCode"
value="Add Shpopping Item"
title="Add Shopping Item"
style="width: 200px;"/>
</form>
</td>
</tr>
<tr>
<td style="text-align: left; width: 25%;"></td>
<td style="text-align: left; width: 126px;" class="FieldLabel">${shoppingController.appProps['RTN']}</td>
<td style="text-align: left; width: 274px;" class="FieldLabel">Long Name</td>
</tr>
<tr>
<td style="text-align: right; width: 208px;" class="FieldLabel">${shoppingController.appProps['FI']} Details:</td>
<td style="text-align: left; width: 126px;">
<input class="DisabledField" size="10" value="${shoppingController.getPartner(param.cuid).rtn}" name="txtRtn" id="txtRtn" readonly="readonly" />
</td>
<td style="text-align: left; width: 274px;">
<input class="DisabledField" size="25" value="${shoppingController.getPartner(param.cuid).longname}" name="txtLongName" id="txtLongName" readonly="readonly" />
</td>
</tr>
<tr>
<td style="text-align: right;" class='FieldLabel'>Select Px Code Group :</td>
<td style="width: 50%; text-align: left;" class="FieldLabel" colspan="2">
<int:shoppingGroupId formId="PxCodeGroupForm" postTo="shoppingList.xhtml" cuid="${param.cuid}"/>
</td>
</tr>
<tr>
<td style="text-align: right;" class='FieldLabel'>Px Code :</td>
<td style="text-align: left; width: 126px;" colspan="2">
<form id="frmSearchByCode" method="post" action="shoppingList.xhtml">
<input type="hidden" name="cuid" value="${param.cuid}"/>
<c:if test="${not empty param.shoppingGroupId}">
<input type="hidden" name="shoppingGroupId" value="${param.shoppingGroupId}"/>
</c:if>
<h:inputText size="28" id="txtShoppingCode" value="${param.txtShoppingCode}"/>
<input class="ButtonStyle" type="submit" name="btnSearchCode" id = "btnSearchCode"
value="Search" title="Search Shppoing Item"/>
<!-- <h:commandButton action="#{PxController.getPxCodesByPartnerId(param.cuid)}" value="Search" ></h:commandButton> -->
</form>
</td>
</tr>
<tr>
<td colspan="3">
<table style="width: 100%;">
<tr style="vertical-align: top; text-align: center;">
<td style="text-align: left; width: 100%;" colspan="5">
<h3>List of Seacrh Items</h3>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td colspan="3">
<h:form id="frmPxList">
<input type="hidden" name="cuid" value="${param.cuid}"/>
<c:if test="${not empty param.txtShoppingCode}">
<input type="hidden" name="txtShoppingCode" value="${param.txtShoppingCode}"/>
</c:if>
<c:if test="${not empty param.txtShoppingCode}">
<input type="hidden" name="txtShoppingCode" value="${param.txtShoppingCode}"/>
</c:if>
<p:dataTable var="shoppingItemRow" value="${pageData}"
styleClass="hide-column-names" paginator="true" paginatorPosition="bottom" rows="10" rowsPerPageTemplate="10,25,50">
<p:column style="border-width: 0px;">
<h:outputLink rendered="${not empty param.txtShoppingCode}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[0].id}" />
<f:param name="txtShoppingCode" value="${param.txtShoppingCode}" />
${shoppingItemRow[0].name}
</h:outputLink>
<h:outputLink rendered="${empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[0].id}" />
${shoppingItemRow[0].name}
</h:outputLink>
</p:column>
<p:column style="border-width: 0px;">
<h:outputLink rendered="${not empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[1].id}" />
<f:param name="shoppingGroupId" value="${param.shoppingGroupId}" />
${shoppingItemRow[1].name}
</h:outputLink>
<h:outputLink rendered="${empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[1].id}" />
${shoppingItemRow[1].name}
</h:outputLink>
</p:column>
<p:column style="border-width: 0px;">
<h:outputLink rendered="${not empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[2].id}" />
<f:param name="shoppingGroupId" value="${param.shoppingGroupId}" />
${shoppingItemRow[2].name}
</h:outputLink>
<h:outputLink rendered="${empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[2].id}" />
${shoppingItemRow[2].name}
</h:outputLink>
</p:column>
<p:column style="border-width: 0px;">
<h:outputLink rendered="${not empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[3].id}" />
<f:param name="shoppingGroupId" value="${param.shoppingGroupId}" />
${shoppingItemRow[3].name}
</h:outputLink>
<h:outputLink rendered="${empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[3].id}" />
${shoppingItemRow[3].name}
</h:outputLink>
</p:column>
<p:column style="border-width: 0px;">
<h:outputLink rendered="${not empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[4].id}" />
<f:param name="shoppingGroupId" value="${param.shoppingGroupId}" />
${shoppingItemRow[4].name}
</h:outputLink>
<h:outputLink rendered="${empty param.shoppingGroupId}" value="${request.contextPath}/shoppingItemEdit.xhtml" styleClass="pages">
<f:param name="cuid" value="${param.cuid}" />
<f:param name="shoppingId" value="${shoppingItemRow[4].id}" />
${shoppingItemRow[4].name}
</h:outputLink>
</p:column>
</p:dataTable>
</h:form>
</td>
</tr>
<ui:debug hotkey="k" rendered="true"/>
</tbody>
</table>
<script type="text/javascript">
$(document).ready(function () {
var $frmAddCode = $('#frmAddCode');
$frmAddCode.append('<input type="hidden" name="cuid" value="${param.cuid}" />');
$('#btnAddCode').click(function() {
$frmAddCode.submit();
});
});
</script>
</ui:define>
</ui:composition>