jsf-primefaces我无法从数据库表中获取当前行
我正在将Netbeans与Primefaces一起使用。我的问题是不能立即使用。当我单击该行时，除了p:dialog是空的之外，一切都正常 我无法理解为什么jsf-primefaces我无法从数据库表中获取当前行,jsf,primefaces,Jsf,Primefaces,我正在将Netbeans与Primefaces一起使用。我的问题是不能立即使用。当我单击该行时，除了p:dialog是空的之外，一切都正常 我无法理解为什么getCurrent方法在没有Primefaces但没有Primefaces的情况下工作 代码如下 非常感谢你的帮助 谢谢 ArabaController.java代码如下： @ManagedBean(name = "arabaController") @SessionScoped public class ArabaController i
getCurrent@ManagedBean(name = "arabaController")
@SessionScoped
public class ArabaController implements Serializable {
private primeController mediumCarsModel;
private primeController arabaList;
private primeController getprimeAraba;
private List<Araba> carsSmall;
private ArabaController y;
private Araba current;
private Araba selectedCar;
private DataModel items = null;
private String Marka;
private String Model;
private String Renk;
private int Yil;
private DataModel sel;
public static int deneme;
@EJB
private session.ArabaFacade ejbFacade;
private PaginationHelper pagination;
private int selectedItemIndex;
public Araba getSelected() {
if (current == null) {
current = new Araba();
selectedItemIndex = -1;
}
return current;
}
private ArabaFacade getFacade() {
return ejbFacade;
}
public PaginationHelper getPagination() {
if (pagination == null) {
pagination = new PaginationHelper(20) {
@Override
public int getItemsCount() {
return getFacade().count();
}
@Override
public DataModel createPageDataModel() {
return new ListDataModel(getFacade().findRange(new int[]{getPageFirstItem(), getPageFirstItem() + getPageSize()}));
}
};
}
return pagination;
}
public String prepareList() {
recreateModel();
System.out.println("selim");
return "List";
}
public String prepareView() {
current = (Araba) getItems().getRowData();
selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
return "View";
}
public Araba getCurrent(){
selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
current = (Araba) getItems().getRowData();
System.out.println(selectedItemIndex) ;
System.out.println(current);
System.out.println("current");
return current;
}
//////////////////////////////////////////////////////////////////////
public void onRowSelect(SelectEvent event) {
FacesMessage msg = new FacesMessage("Seçilen Araba", ((Araba) event.getObject()).getMarka());
FacesContext.getCurrentInstance().addMessage(null, msg);
}
public void getSelectedMarka(SelectEvent event)
{
Marka=((Araba) event.getObject()).getMarka();
return;
}
public String getSelectedModel(SelectEvent event)
{
Model=((Araba) event.getObject()).getModel();
return Model;
}
public String getSelectedRenk(SelectEvent event)
{
Renk=((Araba) event.getObject()).getRenk();
return Renk;
}
public int getSelectedYil(SelectEvent event)
{
Yil=((Araba) event.getObject()).getYil();
return Yil;
}
/////////////////////////////////////////////////////////////////////////////////////
public String prepareCreate() {
current = new Araba();
selectedItemIndex = -1;
return "Create";
}
public String create() {
try {
getFacade().create(current);
JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("ArabaCreated"));
return prepareCreate();
} catch (Exception e) {
JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
return null;
}
}
public String prepareEdit() {
current = (Araba) getItems().getRowData();
selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
return "Edit";
}
public String update() {
try {
getFacade().edit(current);
JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("ArabaUpdated"));
return "View";
} catch (Exception e) {
JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
return null;
}
}
public String destroy() {
current = (Araba) getItems().getRowData();
selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
performDestroy();
recreatePagination();
recreateModel();
return "List";
}
public String destroyAndView() {
performDestroy();
recreateModel();
updateCurrentItem();
if (selectedItemIndex >= 0) {
return "View";
} else {
// all items were removed - go back to list
recreateModel();
return "List";
}
}
private void performDestroy() {
try {
getFacade().remove(current);
JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("ArabaDeleted"));
} catch (Exception e) {
JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
}
}
private void updateCurrentItem() {
int count = getFacade().count();
if (selectedItemIndex >= count) {
// selected index cannot be bigger than number of items:
selectedItemIndex = count - 1;
// go to previous page if last page disappeared:
if (pagination.getPageFirstItem() >= count) {
pagination.previousPage();
}
}
if (selectedItemIndex >= 0) {
current = getFacade().findRange(new int[]{selectedItemIndex, selectedItemIndex + 1}).get(0);
}
}
public DataModel getItems() {
if (items == null) {
items = getPagination().createPageDataModel();
}
return items;
}
private void recreateModel() {
items = null;
}
private void recreatePagination() {
pagination = null;
}
public String next() {
getPagination().nextPage();
recreateModel();
return "List";
}
public String previous() {
getPagination().previousPage();
recreateModel();
return "List";
}
public SelectItem[] getItemsAvailableSelectMany() {
return JsfUtil.getSelectItems(ejbFacade.findAll(), false);
}
public SelectItem[] getItemsAvailableSelectOne() {
return JsfUtil.getSelectItems(ejbFacade.findAll(),true);
}
public Object getRowDataTable()
{
return sel.getRowData();
}
@FacesConverter(forClass = Araba.class)
public static class ArabaControllerConverter implements Converter {
public Object getAsObject(FacesContext facesContext, UIComponent component, String value) {
if (value == null || value.length() == 0) {
return null;
}
ArabaController controller = (ArabaController) facesContext.getApplication().getELResolver().
getValue(facesContext.getELContext(), null, "arabaController");
return controller.ejbFacade.find(getKey(value));
}
java.lang.Integer getKey(String value) {
java.lang.Integer key;
key = Integer.valueOf(value);
return key;
}
String getStringKey(java.lang.Integer value) {
StringBuffer sb = new StringBuffer();
sb.append(value);
return sb.toString();
}
public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
if (object == null) {
return null;
}
if (object instanceof Araba) {
Araba o = (Araba) object;
return getStringKey(o.getIdaraba());
} else {
throw new IllegalArgumentException("object " + object + " is of type " + object.getClass().getName() + "; expected type: " + ArabaController.class.getName());
}
}
}
////////////////////////////////////////////////////////////////////////////////////
public Araba getSelectedCar() {
return selectedCar;
}
public void setSelectedCar(Araba selectedCar) {
this.selectedCar = selectedCar;
}
public primeController getMediumCarsModel() {
mediumCarsModel = new primeController(ejbFacade.findAll());
return mediumCarsModel;
}
///////////////////////////////////////////////////////////////////////////////////////
}
@ManagedBean(name = "primeController")
@SessionScoped
public class primeController extends ListDataModel<Araba> implements SelectableDataModel<Araba> {
private session.ArabaFacade x;
private Araba current;
private DataModel items = null;
@EJB
private session.ArabaFacade ejbFacade;
private PaginationHelper pagination;
private int selectedItemIndex;
public primeController() {
}
public primeController(List<Araba> data) {
super(data);
}
public List<Araba> sendAraba()
{
List<Araba> cars = x.findAll();
return cars;
}
@Override
public Araba getRowData(String rowKey) {
//In a real app, a more efficient way like a query by rowKey should be implemented to deal with huge data
List<Araba> cars = x.findAll();
System.out.print("olmalı idi");
for(Araba car : cars) {
if(car.getModel().equals(rowKey))
return car;
}
return null;
}
@Override
public Object getRowKey(Araba car) {
controller.ArabaController.deneme=3;
return car.getModel();
}
}
public abstract class AbstractFacade<T> {
private Class<T> entityClass;
public AbstractFacade(Class<T> entityClass) {
this.entityClass = entityClass;
}
protected abstract EntityManager getEntityManager();
public void create(T entity) {
getEntityManager().persist(entity);
}
public void edit(T entity) {
getEntityManager().merge(entity);
}
public void remove(T entity) {
getEntityManager().remove(getEntityManager().merge(entity));
}
public T find(Object id) {
return getEntityManager().find(entityClass, id);
}
public List<Araba> findAll() {
// javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
//cq.select(cq.from(entityClass));
//return getEntityManager().createQuery(cq).getResultList();
CriteriaBuilder cb= getEntityManager().getCriteriaBuilder();
CriteriaQuery<Araba> cq= cb.createQuery(Araba.class);
Root<Araba> araba=cq.from(Araba.class);
cq.select(araba);
TypedQuery<Araba> q=getEntityManager().createQuery(cq);
List<Araba> tumArabalar=q.getResultList();
System.out.println("current");
return tumArabalar;
}
public List<Araba> findRange(int[] range) {
// javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
// cq.select(cq.from(entityClass));
// javax.persistence.Query q = getEntityManager().createQuery(cq);
CriteriaBuilder cb= getEntityManager().getCriteriaBuilder();
CriteriaQuery<Araba> cq= cb.createQuery(Araba.class);
Root<Araba> araba=cq.from(Araba.class);
cq.select(araba);
TypedQuery<Araba> q=getEntityManager().createQuery(cq);
q.setMaxResults(range[1] - range[0]);
q.setFirstResult(range[0]);
return q.getResultList();
}
public int count() {
javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
javax.persistence.criteria.Root<T> rt = cq.from(entityClass);
cq.select(getEntityManager().getCriteriaBuilder().count(rt));
javax.persistence.Query q = getEntityManager().createQuery(cq);
return ((Long) q.getSingleResult()).intValue();
}
}
公共抽象类AbstractFacade{
私有类实体类；
公共抽象外观（类entityClass）{
this.entityClass=entityClass；
}
受保护的抽象EntityManager getEntityManager（）；
公共无效创建（T实体）{
getEntityManager（）.persist（实体）；
}
公共无效编辑（T实体）{
getEntityManager（）.merge（实体）；
}
公共无效删除（T实体）{
getEntityManager（）.remove（getEntityManager（）.merge（entity））；
}
公共找不到（对象id）{
返回getEntityManager（）.find（entityClass，id）；
}
公共列表findAll（）{
//javax.persistence.CriteriaQuery cq=getEntityManager（）.getCriteriaBuilder（）.createQuery（）；
//cq.select（cq.from（entityClass））；
//返回getEntityManager（）.createQuery（cq.getResultList（）；
CriteriaBuilder cb=getEntityManager（）.getCriteriaBuilder（）；
CriteriaQuery cq=cb.createQuery（Araba.class）；
根araba=cq.from（araba.class）；
cq.select（阿拉巴）；
TypedQuery q=getEntityManager（）.createQuery（cq）；
List tumArabalar=q.getResultList（）；
系统输出打印项次（“当前”）；
返回图马拉巴拉尔；
}
公共列表findRange（int[]范围）{
//javax.persistence.CriteriaQuery cq=getEntityManager（）.getCriteriaBuilder（）.createQuery（）；
//cq.select（cq.from（entityClass））；
//javax.persistence.Query q=getEntityManager（）.createQuery（cq）；
CriteriaBuilder cb=getEntityManager（）.getCriteriaBuilder（）；
CriteriaQuery cq=cb.createQuery（Araba.class）；
根araba=cq.from（araba.class）；
cq.select（阿拉巴）；
TypedQuery q=getEntityManager（）.createQuery（cq）；
q、 setMaxResults（范围[1]-范围[0]）；
q、 setFirstResult（范围[0]）；
返回q.getResultList（）；
}
公共整数计数（）{
javax.persistence.CriteriaQuery cq=getEntityManager（）.getCriteriaBuilder（）.createQuery（）；
javax.persistence.criteria.Root rt=cq.from（entityClass）；
选择（getEntityManager（）.getCriteriaBuilder（）.count（rt））；
javax.persistence.Query q=getEntityManager（）.createQuery（cq）；
返回（（长）q.getSingleResult（））.intValue（）；
}
}
@Stateless
public class ArabaFacade extends AbstractFacade<Araba> {
@PersistenceContext(unitName = "WebApplication1PU")
private EntityManager em;
@Override
protected EntityManager getEntityManager() {
return em;
}
public ArabaFacade() {
super(Araba.class);
}
}
@无状态
公共类ArabaFacade扩展了AbstractFacade{
@PersistenceContext（unitName=“WebApplication1PU”）
私人实体管理者；
@凌驾
受保护的EntityManager getEntityManager（）{
返回em；
}
公共建筑{
超级（阿拉巴级）；
}
}
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
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:p="http://primefaces.org/ui">
<ui:composition template="/template.xhtml">
<ui:define name="title">
<h:outputText value="#{bundle.ListArabaTitle}"></h:outputText>
</ui:define>
<ui:define name="body">
<h:form id="form" styleClass="jsfcrud_list_form">
<p:growl id="growl" showDetail="true"/>
<h:panelGroup id="messagePanel" layout="block">
<h:messages errorStyle="color: red" infoStyle="color: green" layout="table"/>
</h:panelGroup>
<h:outputText escape="false" value="#{bundle.ListArabaEmpty}" rendered="#{arabaController.items.rowCount == 0}"/>
<h:panelGroup rendered="#{arabaController.items.rowCount > 0}">
<h:outputText value="#{arabaController.pagination.pageFirstItem + 1}..#{arabaController.pagination.pageLastItem + 1}/#{arabaController.pagination.itemsCount}"/>
<h:commandLink action="#{arabaController.previous}" value="#{bundle.Previous} #{arabaController.pagination.pageSize}" rendered="#{arabaController.pagination.hasPreviousPage}"/>
<h:commandLink action="#{arabaController.next}" value="#{bundle.Next} #{arabaController.pagination.pageSize}" rendered="#{arabaController.pagination.hasNextPage}"/>
<p:dataTable id="araba" var="item" value="#{arabaController.mediumCarsModel}" rowKey="#{item.idaraba}" paginator="true" rows="20"
selection="#{arabaController.selected}" selectionMode="single" >
<p:ajax event="rowSelect" listener="#{arabaController.onRowSelect}"
update=":form:display :form:growl" oncomplete="carDialog.show()" />
<p:column>
<f:facet name="header">
<h:outputText value="#{bundle.ListArabaTitle_idaraba}"/>
</f:facet>
<h:outputText value="#{item.idaraba}"/>
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="#{bundle.ListArabaTitle_marka}"/>
</f:facet>
<h:outputText value="#{item.marka}"/>
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="#{bundle.ListArabaTitle_renk}"/>
</f:facet>
<h:outputText value="#{item.renk}"/>
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="#{bundle.ListArabaTitle_yil}"/>
</f:facet>
<h:outputText value="#{item.yil}"/>
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="#{bundle.ListArabaTitle_model}"/>
</f:facet>
<h:outputText value="#{item.model}"/>
</p:column>
</p:dataTable>
<p:dialog id="dialog" header="Car Detail" widgetVar="carDialog" resizable="false"
showEffect="explode" hideEffect="explode">
<h:panelGrid id="display" columns="2" cellpadding="4">
<h:outputText value="#{bundle.ViewArabaLabel_idaraba}"/>
<h:outputText value="#{arabaController.current.idaraba}" title="#{bundle.ViewArabaTitle_idaraba}"/>
<h:outputText value="#{bundle.ViewArabaLabel_marka}"/>
<h:outputText value="#{arabaController.current.marka}" title="#{bundle.ViewArabaTitle_marka}"/>
<h:outputText value="#{bundle.ViewArabaLabel_renk}"/>
<h:outputText value="#{arabaController.current.renk}" title="#{bundle.ViewArabaTitle_renk}"/>
<h:outputText value="#{bundle.ViewArabaLabel_yil}"/>
<h:outputText value="#{arabaController.current.yil}" title="#{bundle.ViewArabaTitle_yil}"/>
<h:outputText value="#{bundle.ViewArabaLabel_model}"/>
<h:outputText value="#{arabaController.current.model}" title="#{bundle.ViewArabaTitle_model}"/>
</h:panelGrid>
</p:dialog>
</h:panelGroup>
<br />
<h:commandLink action="#{arabaController.prepareCreate}" value="#{bundle.ListArabaCreateLink}"/>
<br />
<br />
<h:commandLink value="#{bundle.ListArabaIndexLink}" action="/index" immediate="true" />
</h:form>
</ui:define>
</ui:composition>
</html>
bundlebundle<h:outputText value="#{bundle.ViewArabaLabel_idaraba}"/>
如果在JSF页面中抛出异常，则不会呈现页面的其余部分。这可以解释为什么您的对话框是空的。我在Primefaces 3.3.1中看到了类似的问题。 我有一个表单，其中包含一些输入字段来执行搜索，然后是带有搜索结果的数据表。 我注意到AJAX请求得到的响应是
<partial-response>
<error>
<error-name>class java.lang.StringIndexOutOfBoundsException</error-name>
<error-message>String index out of range: -1</error-message>
</error>
</partial-response>
类java.lang.StringIndexOutOfBoundsException
字符串索引超出范围：-1
这似乎使事情变得更好。显然，他指的是资源包（属性文件）。
<partial-response>
<error>
<error-name>class java.lang.StringIndexOutOfBoundsException</error-name>
<error-message>String index out of range: -1</error-message>
</error>
</partial-response>