我正在使用JSF开发一个项目。在一个打开的弹出窗口中,我想显示一些产品的详细信息,但无法在数据表上获取视图范围bean的值。
你能帮助我吗?
感谢。
这是我的UrunuDenetlemeSayfasi.xhtml代码段:
<h:commandLink onclick="window.open('UruneGozAt.xhtml',
'Ürün İçeriği', config='width=700, height=400, top=100, left=100,
scrollbars=no, resizable=no');"
action="#{uruneGozAtBean.urunIdsineGoreUrunIcerigiGetir}" value="Ürün İçeriğine Göz At">
<f:param name="urunid" value="#{urun.urunID}" />
</h:commandLink>
这是UrunuGozAt.xhtml:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:body>
<h:dataTable class="table table-striped"
value="#{uruneGozAtBean.urunIcerik}" var="urun">
<h:column>
<f:facet name="header">
<h:outputText value="barkod no" />
</f:facet>
<h:outputText value="#{urun.barkodNo}" />
</h:column>
</h:dataTable>
</h:body>
</html>
这是UruneGozAtBean.java
UrunDenetlemeSayfasiBean urunDenetle = new UrunDenetlemeSayfasiBean();
UrunDenetleService urunService = new UrunDenetleService();
private UrunIcerik urunIcerik = new UrunIcerik();
private Long urunIdParametre;
public UrunIcerik getUrunIcerik() {
return urunIcerik;
}
public void setUrunIcerik(UrunIcerik urunIcerik) {
this.urunIcerik = urunIcerik;
}
public Long getUrunIdParametre() {
return urunIdParametre;
}
public void setUrunIdParametre(Long urunIdParametre) {
this.urunIdParametre = urunIdParametre;
}
public void urunIdsineGoreUrunIcerigiGetir() {
setUrunIcerik(urunService.urunIdsineGoreUrunIcerigiGetir(urunIdEldeEt()));
}
public Long urunIdEldeEt(){
FacesContext fc = FacesContext.getCurrentInstance();
setUrunIdParametre(getUrunIdParametre(fc));
return getUrunIdParametre();
}
public Long getUrunIdParametre(FacesContext fc){
Map<String, String> parametre = fc.getExternalContext().getRequestParameterMap();
return Long.valueOf(parametre.get("urunid")).longValue();
}
编辑:
现在是我当前的实现,它返回null
。
我正在使用JSF开发一个项目。在一个打开的弹出窗口中,我想显示一些产品的详细信息,但无法在数据表上获取视图范围bean的值。
你能帮助我吗?
感谢。
这是我的UrunuDenetlemeSayfasi.xhtml代码段:
<h:commandLink onclick="window.open('UruneGozAt.xhtml','Ürün İçeriği',
config='width=700, height=400, top=100, left=100, scrollbars=no, resizable=no');"
value="Ürün İçeriğine Göz At"> <f:param name="urunId" value="#{urun.urunID}" />
</h:commandLink>
这是UruneGozAt.xhtml:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<f:metadata>
<f:viewParam name="urunId" value="#{uruneGozAtBean.urunId}"
required="false" />
<f:viewAction action="#{uruneGozAtBean.urunIdsineGoreUrunIcerigiGetir()}" />
</f:metadata>
<h:head>
<title>Ürün İçeriği</title>
<!-- add this always, even if it's empty -->
</h:head>
<h:body>
<h:dataTable class="table table-striped"
value="#{uruneGozAtBean.urunIcerik}" var="urun">
<h:column>
<f:facet name="header">
<h:outputText value="barkod no" />
</f:facet>
<h:outputText value="#{urun.barkodNo}" />
</h:column>
</h:dataTable>
</h:body>
</html>
这是UruneGozAtBean.java
@ManagedBean
@ViewScoped
public class UruneGozAtBean {
public UrunDenetlemeSayfasiBean urunDenetle = new UrunDenetlemeSayfasiBean();
public UrunDenetleService urunService = new UrunDenetleService();
private ArrayList<UrunIcerik> urunIcerik = new ArrayList<UrunIcerik>();
private Long urunId;
public Long getUrunId() {
return urunId;
}
public void setUrunId(Long urunId) {
this.urunId = urunId;
}
public ArrayList<UrunIcerik> getUrunIcerik() {
return urunIcerik;
}
public void setUrunIcerik(ArrayList<UrunIcerik> urunIcerik) {
this.urunIcerik = urunIcerik;
}
public void urunIdsineGoreUrunIcerigiGetir() {
setUrunIcerik(urunService.urunIdsineGoreUrunIcerigiGetir(urunIdEldeEt()));
System.out.print("aaa");
}
public Long urunIdEldeEt() {
FacesContext fc = FacesContext.getCurrentInstance();
setUrunId(getUrunId(fc));
return getUrunId();
}
public Long getUrunId(FacesContext fc) {
Map<String, String> parametre = fc.getExternalContext().getRequestParameterMap();
return Long.valueOf(parametre.get("urunId")).longValue();
}
}
答案 0 :(得分:3)
@ViewScoped
个bean。如果从当前视图打开弹出窗口,那么您将打开一个新视图,因此即使它使用相同的托管bean来显示数据,因为它们是不同的视图,它们使用同一类的不同实例。
在这种情况下,您应该通过查询字符串传递参数,然后在视图中接收它并处理它以加载所需的数据。在这种情况下,您的代码将是这样的(注意:请确保您发送名称为"urunId"
的参数):
UrunuGozAt.xhtml:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
<!-- add this always, even if it's empty -->
<f:metadata>
<f:viewParam name="urunId" value="#{uruneGozAtBean.urunId}"
required="false" />
<f:viewAction action="#{uruneGozAtBean.loadData}" />
</f:metadata>
</h:head>
<h:body>
<h:dataTable class="table table-striped"
value="#{uruneGozAtBean.urunIcerik}" var="urun">
<h:column>
<f:facet name="header">
<h:outputText value="barkod no" />
</f:facet>
<h:outputText value="#{urun.barkodNo}" />
</h:column>
</h:dataTable>
</h:body>
</html>
UruneGozAtBean托管bean:
@ViewScoped
@ManagedBean
public class UruneGozAtBean {
//your current fields, getters and setters...
private Long urunId;
//getter and setter for this field...
public void loadData() {
if (urunId != null) {
//load the data for the table...
}
}
}
更多信息:
答案 1 :(得分:0)
DataTable需要一个列表来迭代,但据我所知,你返回一个UrunIcerik对象。