【发布时间】：2013-02-01 12:17:09
【问题描述】：
我对视图范围 bean 有疑问。我知道这是常见的问题，但我没有得到正确的答案。我有一个数据表，负责在用户输入搜索某些条件时显示搜索结果。 这是xhtml：
<html xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns="http://www.w3.org/1999/xhtml"
xmlns:p="http://primefaces.org/ui">
<h:panelGroup id ="adminReportLogList">
<p:dataTable value="#{adminLogView.lazyModelReport}" var="model" id="reportLogList" lazy="true" paginator="true" rows="20" paginatorAlwaysVisible="false" paginatorPosition="bottom" emptyMessage="emppty list" styleClass="dtable" style="table-layout: fixed; width: 100%"
paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}" rowsPerPageTemplate="5,10,15,20">
<p:column headerText="Report number" sortBy="#{model.reportNumber}">
<h:outputText value="#{model.reportLogId}"/>
</p:column>
<p:column headerText="Report date" sortBy="#{model.reportDate}">
<h:outputText value="#{model.reportDate}">
<f:convertDateTime pattern="yyyy/MM/dd hh:mm:ss"/>
</h:outputText>
</p:column>
<p:column headerText="Search date" sortBy="#{model.searchLogId.searchDate}">
<h:outputText value="#{model.searchLogId.searchdate}">
<f:convertDateTime pattern="yyyy/MM/dd hh:mm:ss"/>
</h:outputText>
</p:column>
<p:column headerText="User name" sortBy="#{model.searchLogId.loginLogId.username}">
<h:outputText value="#{model.searchLogId.loginLogId.username}"/>
</p:column>
<p:column headerText="Customer number" sortBy="#{model.customerId}">
<h:outputText value="#{model.customerId.registernumber}"/>
</p:column>
<p:column headerText="Customer name" sortBy="#{model.customerId}">
<h:outputText value="#{model.customerId.name}"/>
</p:column>
</p:dataTable>
</h:panelGroup>
<br/>
// SEARCH PANEL
<p:panel>
<h:panelGrid columns="3" styleClass="insGrid" id="reportLogSearchPanel">
<h:outputText value="User: "/>
<p:inputText id="reportLogSearchByUserName" value="#{adminLogView.searchUserName}">
<p:watermark for="reportLogSearchByUserName" value ="Customer name"/>
</p:inputText>
<h:message for="reportLogSearchByUserName" id="msgReportLogSearchByUserName" styleClass="errorMessage"/>
<h:outputText value="Customer id number: "/>
<p:inputText id="reportLogSearchByCustomerName" value="#{adminLogView.searchCustomerName}">
<p:watermark for="reportLogSearchByCustomerName" value="Customer id number"/>
</p:inputText>
<h:message for="reportLogSearchByCustomerName" id="msgReportLogSearchBySearchDate" styleClass="errorMessage"/>
<h:outputText value="Report date "/>
<p:inputText id="reportLogSearchByReportDate" value="#{adminLogView.searchReportDate}">
<p:watermark for="reportLogSearchByReportDate" value="Report date YYYY/MM/DD"/>
</p:inputText>
<h:message for="reportLogSearchByReportDate" id="msgReportLogSearchByReportDate" styleClass="errorMessage"/>
<h:panelGroup/>
<h:commandButton value="Search" styleClass="btn" action="#{adminLogView.searchReport()}">
<f:ajax render =":form:adminReportLogList :form:reportLogList" execute=":form:reportLogSearchPanel"/>
</h:commandButton>
</h:panelGrid>
</p:panel>
在另一个xhtml的标签中使用的是：/我认为在这种情况下不是原因/
<ui:composition xmlns:ui="http://java.sun.com/jsf/facelets"
template="./../templates/admin_main.xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui">
<ui:define name="content">
<h:panelGroup id="include">
<ui:include src="#{adminLogView.page}.xhtml"/>
</h:panelGroup>
</ui:define>
</ui:composition>
这是我的豆子
@Named(value = "adminLogView")
@ViewScoped
public class AdminLogView implements Serializable{
@EJB
private LogServiceLocal logService;
private List<Reportlog> ReportLogList;
String page = "reportLog";
LazyDataModel<Reportlog> lazyModelReport;
LazyDataModel<Loginlog> lazyModelLogin;
LazyDataModel<Searchlog> lazyModelSearch;
String searchCustomerName;
String searchUserName;
String searchReportDate;
@PostConstruct
public void init(){
this.lazyModelReport = new LazyReportLogDataModel(this.logService);
}
public void searchReport(){
Map<String, String> filter = new HashMap<String, String>();
if(this.searchCustomerName != null && !this.searchCustomerName.isEmpty())
filter.put("customerName", this.searchCustomerName);
if(this.searchReportDate != null && !this.searchReportDate.isEmpty())
filter.put("reportDate", this.searchReportDate);
if(this.searchUserName != null && !this.searchUserName.isEmpty())
filter.put("userName", this.searchUserName);
this.lazyModelReport.load(0, 30, null, SortOrder.UNSORTED, filter);
}
}
当我们导航到上面的页面时，@postConstruct 方法会被多次调用，即使使用 sessionScoped 也是如此。即使我们在同一视图中单击搜索按钮，bean 也会再次初始化。只有 RequestScope 可以正常工作。 是不是我误解或忘记了。 PS。 提前致谢。
【问题讨论】：
标签： jsf-2 cdi view-scope