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我已經問過一千次，但沒有人給我一個有效的解決方案。請問爲什麼在我的xhtml頁面中，當我按下按鈕時，所有的時候都會調用post構造？我該如何解決這個問題？請有效的解決方案。我已經閱讀了很多答案，但他們不符合我的問題。我有一週的時間遇到麻煩。 我XHTML的範圍沒有改變：@ViewScoped在每次執行操作時調用post構造
update of a render component that updates another component
<!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:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Add a Default Package</title>
</h:head>
<h:body>
<h:form id="form">
<p:outputLabel for="Name">Name:</p:outputLabel>
<p:inputText id="Name"
value="#{addDefaultPackageBean.defpackDTO.name}" />
<p:message for="Name" />
<p:outputLabel for="Location">Locations Available:</p:outputLabel>
<p:selectOneMenu id="Location"
value="#{addDefaultPackageBean.defpackDTO.location}">
<f:selectItems
value="#{addDefaultPackageBean.availableLocations}" />
</p:selectOneMenu>
<p:commandButton action="#{addDefaultPackageBean.Search()}" value="Ciao" render=":form:Volo" update=":form:Volo :form"></p:commandButton>
<p:panel header="Voli Disponibili per la location selezionata"
id="Volo" rendered="#{addDefaultPackageBean.flag}">
<h:panelGrid columns="3" id="voloGrid">
<p:outputLabel for="Volare">Volo:</p:outputLabel>
<p:selectOneMenu for="Volare" value="#{addDefaultPackageBean.fly}">
<f:selectItems id="Volare" value="#{addDefaultPackageBean.elelisfly}"
var="Ciao" itemValue="#{Ciao.name}"
itemLabel="#{Ciao.name}" />
</p:selectOneMenu>
<p:commandButton actionListener="#{addDefaultPackageBean.sel()}" value="hotel and escursions" render="@form" update=":form:Hotel :form"/>
</h:panelGrid>
</p:panel>
<p:outputLabel for="Hotel">Hotel:</p:outputLabel>
<p:selectOneMenu for="Hotel" value="#{addDefaultPackageBean.hotel}">
<f:selectItems id="Hotel"
value="#{addDefaultPackageBean.elelishotel}" var="ElementDTO"
itemValue="#{ElementDTO.name}" itemLabel="#{ElementDTO.name}" />
</p:selectOneMenu>
<p:message for="Hotel" />
<p:commandButton actionListener="#{addDefaultPackageBean.add}" value="Add" update=":form:Volo :form:Hotel" render="@form" process="@this,:form:Volo,:form:Location"/>
</h:form>
</h:body>
</html>
我的豆頁：
package beans;
import java.awt.Event;
import java.io.Serializable;
import java.util.ArrayList;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.enterprise.context.SessionScoped;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.faces.view.ViewScoped;
import elementManagement.ElementMgr;
import elementManagementDTO.ElementDTO;
import DefaultPackageManagement.DefaultPackageMgr;
import DefaultPackageManagementDTO.DefaultPackageDTO;
@ManagedBean(name="addDefaultPackageBean") //come viene richiamato
@ViewScoped
public class AddDefaultPackageBean implements Serializable {
/**
*
*/
@EJB
private DefaultPackageMgr defpackMgr;
private DefaultPackageDTO defpackDTO;
private ArrayList<ElementDTO> elelisfly;
private ArrayList<ElementDTO> elelishotel;
private ArrayList<ElementDTO> elelisescursion;
private ArrayList<ElementDTO> elelis;
private ElementDTO[] selectedEscursions;
private String fly;
private String hotel;
private Boolean flag=true;
private Boolean flagdopo=true;
private ArrayList<String> availableLocations;
private ElementDTO flyElem;
@EJB
private ElementMgr elemMgr;
public ElementDTO[] getSelectedEscursions() {
return selectedEscursions;
}
public void setSelectedEscursions(ElementDTO[] selectedEscursions) {
this.selectedEscursions = selectedEscursions;
}
public AddDefaultPackageBean() {
defpackDTO = new DefaultPackageDTO();
this.elelishotel=new ArrayList<ElementDTO>();
this.elelisescursion=new ArrayList<ElementDTO>();
this.elelisfly=new ArrayList<ElementDTO>();
this.availableLocations=new ArrayList<String>();
this.flyElem=new ElementDTO();
}
@PostConstruct
public void init()
{
System.out.print("merda init ");
if(this.getElelisfly().size()==0){System.out.print("Voli vuoto ");}
this.setElelis(elemMgr.getAllElements());
this.selectedEscursions=new ElementDTO[this.getElelis().size()];
this.fly="";
for(ElementDTO e:elelis)
{
if (this.availableLocations.contains(e.getLocation())==false)
{
this.availableLocations.add(e.getLocation());
}
}
}
public String add() {
System.out.print("entrato nell'ultimo step!il mio hotel è "+hotel);
//System.out.print("entrato nell'ultimo step!il mio hotel è "+this.selectedEscursions[0].getName());
/* //assegno location al pacchetto defpackDTO
this.defpackDTO.setLocation(this.getFlyElem().getLocation());
//assegno location a defpackDTO
this.defpackDTO.getElem().add(this.getFlyElem());
//assegno hotel a defpackDTO
this.AssignElemHotelFromSelection();
//assegno escursioni a defpackDTO
for(int i=0;i<this.selectedEscursions.length;i++)
{
this.defpackDTO.getElem().add(this.selectedEscursions[i]);
}
defpackMgr.save(defpackDTO);
*/
return "/employee/index?faces-redirect=true";
}
public void sel()
{
System.out.print("ehila"+this.fly);
this.setElelis(this.elemMgr.getAllElementsByLocation(this.defpackDTO.getLocation()));
for(ElementDTO e:elelis)
{
System.out.print("elemento della location Haiti "+e.getName());
}
for(ElementDTO e:elelis)
{
System.out.print("elementisfwefsf dei voli "+e.getName());
}
this.AssignElemFlyFromSelection();
System.out.print(this.fly+"Il volo selezionato per la location è "+this.getFlyElem().getName());
this.elelisescursion.clear();
this.elelishotel.clear();
for(ElementDTO e:elelis)
{
if(e.getType().equals("Hotel"))
{
System.out.print("ho un hotel tra gli elementi "+e.getName());
if(e.getStartingDate().after(this.flyElem.getStartingDate())&&((e.getEndingDate().before(this.flyElem.getEndingDate()))))
{
System.out.print("ho un hotel tra gli elementi con le date giuste"+e.getName());
this.getElelishotel().add(e);
}
}
else
{
if(e.getType().equals("Escursion"))
{
if(e.getStartingDate().after(this.flyElem.getStartingDate())&&(e.getEndingDate().before(this.flyElem.getEndingDate())))
{
System.out.print("ho un escursione tra gli elementi con le date giuste"+e.getName());
this.getElelisescursion().add(e);
}
}
}
}
this.setFlag(true);
this.setFlagdopo(true);
}
public DefaultPackageDTO getDefpackDTO() {
return defpackDTO;
}
public void setDefpackDTO(DefaultPackageDTO defpackDTO) {
this.defpackDTO = defpackDTO;
}
public ArrayList<ElementDTO> getElelisfly() {
return elelisfly;
}
public void setElelisfly(ArrayList<ElementDTO> elelisfly) {
this.elelisfly = elelisfly;
}
public ArrayList<ElementDTO> getElelishotel() {
return elelishotel;
}
public void setElelishotel(ArrayList<ElementDTO> elelishotel) {
this.elelishotel = elelishotel;
}
public ArrayList<ElementDTO> getElelisescursion() {
return elelisescursion;
}
public void setElelisescursion(ArrayList<ElementDTO> elelisescursion) {
this.elelisescursion = elelisescursion;
}
public String getFly() {
return fly;
}
public void setFly(String fly) {
this.fly = fly;
}
public String getHotel() {
return hotel;
}
public void setHotel(String hotel) {
this.hotel = hotel;
}
private void AssignElemFlyFromSelection()
{
for (ElementDTO elem:this.elelisfly)
{
if(elem.getName().equals(this.fly))
{
this.flyElem=elem;
}
}
}
private void AssignElemHotelFromSelection()
{
for (ElementDTO elem:this.elelishotel)
{
if(elem.getName().equals(this.hotel))
{
this.defpackDTO.getElem().add(elem);
}
}
}
private void AssignElemEscursionFromSelection()
{
for(int i=0;i<selectedEscursions.length;i++)
{
this.defpackDTO.getElem().add(selectedEscursions[i]);
}
}
public void Search(){
this.getElelisfly().clear();
String s=defpackDTO.getLocation();
System.out.print("luogo scelto "+s);
this.setElelis(this.elemMgr.getAllElementsByLocation(s));
for(ElementDTO e:elelis)
{
System.out.print("aggiungo volo "+e.getName());
if(e.getType().equals("Flight"))
{
this.getElelisfly().add(e);
System.out.print("aggiungo volo "+e.getName());
}
}
this.setFlag(true);
}
public ArrayList<ElementDTO> getElelis() {
return elelis;
}
public void setElelis(ArrayList<ElementDTO> elelis) {
this.elelis = elelis;
}
public ArrayList<String> getAvailableLocations() {
return availableLocations;
}
public void setAvailableLocations(ArrayList<String> availableLocations) {
this.availableLocations = availableLocations;
}
public Boolean getFlag() {
return flag;
}
public void setFlag(Boolean flag) {
this.flag = flag;
}
public boolean isFlagdopo() {
return flagdopo;
}
public void setFlagdopo(boolean flagdopo) {
this.flagdopo = flagdopo;
}
public ElementDTO getFlyElem() {
return flyElem;
}
public void setFlyElem(ElementDTO flyElem) {
this.flyElem = flyElem;
}
}
Muchas gracias ahora todo funciona！現在所有作品!!!!!! – Rotom92