美好的一天！
我正在使用JSF 2.1 Primefaces 4.0 Glassfish 3.2.1
在我的 Form.xhtml 中，我有这段代码。
<h:form id="modDlgFormc">
<p:dialog id="modIDc" header="Criteria Info"
showEffect="fade" hideEffect="fade" modal="true"
resizable="false" widgetVar="modDlgc" closable="false"
position="center" visible ="#{Fame.modVisiblec}">
<p:messages id="pmsgCrit" closable="true"/>
<h:panelGrid id="criteriapGrid" columns="1">
<h:panelGrid id="critLabelId" columns="2">
<p:selectOneMenu id="fieldNameId" value="#
{Fame.fieldName}" var="fieldSelect">
<f:selectItem itemLabel="Select Field Name"
itemValue="" />
<f:selectItems value="#{Fame.fieldNameMap}" />
<p:ajax event="change" update="fieldNameId
operandId" listener="#{Fame.fieldNameChange}"/>
</p:selectOneMenu>
<p:selectOneMenu id="operandId" value="#{Fame.operator}" >
<f:selectItem itemLabel="Select Operand" itemValue="" />
<f:selectItems value="#{Fame.operandMap}" />
<p:ajax event="change" update="operandId valueId"
listener="#{Fame.operandChange}" />
</p:selectOneMenu>
</h:panelGrid>
<h:panelGrid id="valueId" columns="2">
<c:if test="#{Fame.showValue == 'txt'}">
<h:outputLabel for="inputVal" value="Value : " style="font-weight: bolder"/>
<p:inputText id="inputVal" size="30" value="#{Fame.value}"/>
<c:if test="#{Fame.operator == 'Is Between'}">
<h:outputText value=""/>
<p:inputText size="30" value="#{Fame.value2}"/>
</c:if>
</c:if>
<c:if test="#{Fame.showValue == 'cal'}">
<h:outputLabel for="fromDateId" value="From : " style="font-weight: bolder"/>
<p:calendar id="fromDateId" value="#{Fame.date}" showButtonPanel="true" maxdate="#{Fame.maxDate}"/>
<c:if test="#{Fame.operator == 'Is Between'}">
<h:outputLabel for="toDateId" value="To : " style="font-weight: bolder"/>
<p:calendar id="toDateId" value="#{Fame.date2}" showButtonPanel="true" maxdate="#{Fame.maxDate}"/>
</c:if>
</c:if>
<c:if test="#{Fame.showValue == 'upload'}">
<h:outputText value=""/>
<p:commandButton value="UPLOAD" onclick="uconfirmation.show()" type="button" />
</c:if>
</h:panelGrid>
<h:panelGrid id="critBtnId" columns="4">
<p:commandButton id="addBtn" value="ADD" actionListener="#{Fame.saveCriteria}" update=":modDlgFormc:modIDc" rendered="#{empty Fame.editMode}" />
<p:commandButton value="SAVE" actionListener="#{Fame.updateCriteria}" update=":modDlgFormc:modIDc" rendered="#{not empty Fame.editMode}"/>
<p:commandButton value="CANCEL" actionListener="#{Fame.cancelCriteria}" update=":modDlgFormc" rendered="#{not empty Fame.editMode}"/>
<p:commandButton id="mCancelButtonc" value="CLOSE" update=":modDlgFormc:modIDc :wbookForm" actionListener="#{Fame.closealldialogsopen}"/>
</h:panelGrid>
<br/>
</h:panelGrid>
<center>
<h:panelGrid id="critDTable" columns="1">
<p:dataTable id="criteriaTbl" var="criteria" value="#{Fame.createdCriteria}" paginator="true" rows="5" rowIndexVar="rowIndex" paginatorPosition="bottom"
paginatorTemplate="{CurrentPageReport} {FirstPageLink} {PreviousPageLink} {PageLinks} {NextPageLink} {LastPageLink}"
currentPageReportTemplate="{totalRecords} record(s) in {totalPages} page(s)">
<p:column headerText="WORKSHEET NAME">
#{criteria.wsheetName}
</p:column>
<p:column headerText="FIELD NAME">
#{criteria.fieldName}
</p:column>
<p:column headerText="OPERATOR">
#{criteria.operator}
</p:column>
<p:column headerText="VALUE">
#{criteria.value}
</p:column>
<p:column headerText="UPDATE">
<p:panelGrid>
<p:row>
<p:column style="vertical-align: top;border: none">
<p:commandButton actionListener="#{Fame.editCri(rowIndex)}" style="width:30px;text-align:center;border:none;background-color:transparent;" icon="ui-icon-pencil" update=":modDlgFormc" />
<p:commandButton actionListener="#{Fame.deleteCri(rowIndex)}" style="width:30px;text-align:center;border:none;background-color:transparent;" icon="ui-icon-close" update=":modDlgFormc" />
</p:column>
</p:row>
</p:panelGrid>
</p:column>
</p:dataTable>
</h:panelGrid>
</center>
</p:dialog>
</h:form>
我的主要代码
@ManagedBean(name = "Fame")
@SessionScoped
private FameCriteriaDAOImpl fameCriteriaDAOImpl = new FameCriteriaDAOImpl();
private ArrayList<FameCriteriaBean> createdCriteria = new ArrayList();
public void saveCriteria() {
fameCriteriaDAOImpl = new FameCriteriaDAOImpl();
try {
if (this.validate() == true) {
//String wsheetId = fameManagementDP.getWsheetId(group_Id, workbookName);
FameCriteriaBean bean = new FameCriteriaBean();
bean.setWsheetId(this.worksheetId);
bean.setFieldName(this.fieldName);
bean.setOperator(this.operator);
bean.setValue(this.value);
String actionStr = "inserted";
fameCriteriaDAOImpl.save(bean);
}
} catch (SQLException sqlEx) {
sqlEx.printStackTrace();
error(converter.getConvertedError(sqlEx.getMessage()));
} finally {
this.initialize();
this.initializeCreatedCriteria();
this.resetCriteria();
}
}
我的 Bean 代码。
public class FameCriteriaBean {
private String wsheetName = "";
private String wsheetId = "";
private String fieldName = "";
private String operator = "";
private String value = "";
public FameCriteriaBean(){
}
/**
* @return the fieldName
*/
public String getFieldName() {
return fieldName;
}
/**
* @param fieldName the fieldName to set
*/
public void setFieldName(String fieldName) {
this.fieldName = fieldName;
}
/**
* @return the operator
*/
public String getOperator() {
return operator;
}
/**
* @param operator the operator to set
*/
public void setOperator(String operator) {
this.operator = operator;
}
/**
* @return the value
*/
public String getValue() {
return value;
}
/**
* @param value the value to set
*/
public void setValue(String value) {
this.value = value;
}
/**
* @return the wsheetId
*/
public String getWsheetId() {
return wsheetId;
}
/**
* @param wsheetId the wsheetId to set
*/
public void setWsheetId(String wsheetId) {
this.wsheetId = wsheetId;
}
/**
* @return the wsheetName
*/
public String getWsheetName() {
return wsheetName;
}
/**
* @param wsheetName the wsheetName to set
*/
public void setWsheetName(String wsheetName) {
this.wsheetName = wsheetName;
}
}
以下是该方案。
我选择了一个fieldName，然后加载了操作数列表。这是正确的。
我单击ADD按钮，然后显示p：消息，表示没有选择操作数。这是正确的。
我注意到错误出现时我选择的字段名值已经消失。
我的问题是如何不刷新fieldNameId的值，以便在p：message中显示错误后可以使用它。
我在我的java课程中使用SessionScoped是因为我在 Form.xhtml 中使用p:wizard。
请帮我解决这个问题。
谢谢你，更多力量！ ：）
答案 0 :(得分：1)
我做的是这个。 请参阅更新的主要类
@ManagedBean(name = "Fame")
@SessionScoped
private FameCriteriaDAOImpl fameCriteriaDAOImpl = new FameCriteriaDAOImpl();
private ArrayList<FameCriteriaBean> createdCriteria = new ArrayList();
public void saveCriteria() {
fameCriteriaDAOImpl = new FameCriteriaDAOImpl();
if (!this.validate()) {
return;
}
try {
FameCriteriaBean bean = new FameCriteriaBean();
bean.setWsheetId(this.worksheetId);
bean.setFieldName(this.fieldName);
bean.setOperator(this.operator);
bean.setValue(this.value);
String actionStr = "inserted";
fameCriteriaDAOImpl.save(bean);
} catch (SQLException sqlEx) {
sqlEx.printStackTrace();
error(converter.getConvertedError(sqlEx.getMessage()));
} finally {
this.initialize();
this.initializeCreatedCriteria();
this.resetCriteria();
}
}