I am making a JSF project on eclipse neon using JSF 2.0, Primefaces and Bootsfaces components. Even though I am able to create the output and put it inside an arraylist, I am having hard time displaying that arraylist on datatable. Here is my Bean:
#ManagedBean
#SessionScoped
public class FinalList implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
List<ListElements> newList = new ArrayList<>();
public List<ListElements> getResultList(String url, String title) {
ListElements list = new ListElements();
list.setUrl(url);
list.setTitle(title);
newList.add(list);
return newList;
}
}
Here is the contents of my List:
public class ListElements implements Serializable {
private static final long serialVersionUID = 1L;
/**
*
*/
private String Title;
private String Url;
public String getTitle() {
return Title;
}
public void setTitle(String title) {
Title = title;
}
public String getUrl() {
return Url;
}
public void setUrl(String url) {
Url = url;
}
}
Here is my datatable on .xhtml page:
<h:form>
<b:dataTable id="datatbl" value="#{finalList.class}" var="d"
excel="true" csv="true" pdf="true" columnVisibility="true"
copy="true" print="true">
<b:dataTableColumn value="#{d.url}" />
<b:dataTableColumn value="#{d.title}" />
</b:dataTable>
</h:form>
Appearently I am not able to reach my ListElements list. If I try to change value="#{finalList.class}" with anything else , I get
list cannot be resolved as a member of finalList
error. I think I should be able to change it as value="#{finalList.list}". Can someone tell me where I go wrong?
I have tried every way I know but nothing changed. I desperately need help.
All help will be appreciated.
Related
Until now I add the things I want to have in my list over the getter which makes no sense and end in a mess up in my database, when adding a new entry.
My model until now:
#Data
#Entity
public class Telefonbuch {
/*#PostConstruct
public void init() {
//geschaeftsstellen = new ArrayList<String>();
geschaeftsstellen.add("Dortmund");
System.out.println("TEEEEEEEEEEEST");
geschaeftsstellen.add("Essen");
geschaeftsstellen.add("Stralsund");
geschaeftsstellen.add("Stuttgart");
geschaeftsstellen.add("Zürich");
geschaeftsstellen.add("Istanbul");
geschaeftsstellen.add("Köln");
geschaeftsstellen.add("Aachen");
geschaeftsstellen.add("Berlin");
}*/
public List<String> getGeschaeftsstellen() {
geschaeftsstellen = new ArrayList<String>();
geschaeftsstellen.add("Dortmund");
System.out.println("TEEEEEEEEEEEST");
geschaeftsstellen.add("Essen");
geschaeftsstellen.add("Stralsund");
geschaeftsstellen.add("Stuttgart");
geschaeftsstellen.add("Zürich");
geschaeftsstellen.add("Istanbul");
geschaeftsstellen.add("Köln");
geschaeftsstellen.add("Aachen");
geschaeftsstellen.add("Berlin");
//ArrayList<String> a = new ArrayList<String>();
//a.add("Test");
return geschaeftsstellen;
}
public void setGeschaeftsstellen(List<String> geschaeftsstellen) {
this.geschaeftsstellen = geschaeftsstellen;
}
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column
private String vorname;
#Column
private String nachname;
#Column
private String telefonnummer;
#Column
private String handynummer;
#Column
private String geschaeftsstelle;
#Column
#ElementCollection
private List<String> geschaeftsstellen;
I just show the other variables to let you know what is in this. I know the #Column annotation for the List is not necessary. But it's a question for me. Should data like this be in a database or not? I will never use it again somewhere else. What is the right way to insert the data of the list for these selection buttons? When I just uncomment the PostConstruct it won't get called.
When I add #ManagedBean I get the error: DataModel must implement org.primefaces.model.SelectableDataModel when selection is enabled.
But in my .xhtml I already have selection="#{telefonbuchList.selectedEntry}" selectionMode="single" rowKey="#{telefonbuch.id}"
How do i know which import is the right one? javax.annotation or javax.faces.bean? Just with the annotation one it gets called.
Here can see where I use it. It's the tab "Neuer Eintrag" for a newEntry. The tab "Telefonbuch" is the list with a table for all entities.
Edit:
TelefonbuchListController on Request:
#Scope (value = "session")
#Component (value = "telefonbuchList")
#ELBeanName(value = "telefonbuchList")
#Join(path = "/", to = "/eintraege-liste.jsf")
public class TelefonbuchListController {
#Autowired
private TelefonbuchRepository telefonbuchRepository;
private List<Telefonbuch> eintraege;
#Deferred
#RequestAction
#IgnorePostback
public void loadData() {
eintraege = telefonbuchRepository.findAll();
}
public List<Telefonbuch> getEintraege() {
return eintraege;
}
private Telefonbuch selectedEntry;
public Telefonbuch getSelectedEntry() {
return selectedEntry;
}
public void setSelectedEntry(Telefonbuch selectedEntry) {
this.selectedEntry = selectedEntry;
}
public void deleteEntry() {
telefonbuchRepository.delete(selectedEntry);
eintraege.remove(selectedEntry);
selectedEntry = null;
}
I got your question that you are asking for a List getting filled with options usable with a selectOneRadio component - and why #PostConstruct does not work. #PostConstruct is ignored by JPA or other persistence frameworks - it's usable with CDI/Managed beans as far as I know.
Move it to your TelefonbuchList bean:
public class TelefonbuchListController {
#PostConstruct
public void init() {
geschaeftsstellen = new ArrayList<String>();
geschaeftsstellen.add("Dortmund");
geschaeftsstellen.add("Essen");
...
}
public List<String> getGeschaeftsstellen() {
return geschaeftsstellen;
}
}
You can use this list to fill your selectOneRadio component select items.
i trie to run this code
#ManagedBean
#ApplicationScoped
public class Controller implements Serializable {
private static final long serialVersionUID = 1L;
private Benutzer benutzer;
private List<Erfasst> bisherErfasst = new ArrayList<Erfasst>();
private EntityManagerFactory emf = Persistence
.createEntityManagerFactory("CP Kontrolle");
private static Controller instance = new Controller();
public Benutzer getBenutzer() {
return benutzer;
}
public boolean anmelden(String email, int kdnr) {
EntityManager em = emf.createEntityManager();
Query query = em
.createQuery("SELECT b FROM Benutzer b WHERE b.email = :email AND b.kdnr = :kdnr");
query.setParameter("email", email);
query.setParameter("kdnr", kdnr);
List<Benutzer> liste = query.getResultList();
em.close();
if (liste.size() == 1) {
benutzer = liste.get(0);
AngemeldeteBenutzer.getAb().hinzufuegen(benutzer);
return true;
} else {
return false;
}
}
public static Controller getInstance() {
return instance;
}
[....]
}
}
The above code is my ControllerBean. From the Login-Form, user data will be checked in the "anmelden" Class and return true or false if it was successfully.If successfully, the user will be store into a list, as you can see.
#ManagedBean
#ApplicationScoped
public class AngemeldeteBenutzer implements Serializable {
private static final long serialVersionUID = 1L;
private List<Benutzer> online = new LinkedList<Benutzer>();
private static AngemeldeteBenutzer ab = new AngemeldeteBenutzer();
public static AngemeldeteBenutzer getAb() {
return ab;
}
public List<Benutzer> getOnline() {
return online;
}
public void hinzufuegen(Benutzer benutzer) {
online.add(benutzer);
}
}
This is my other Bean, which store the successfully logged user into a list.
Now i want to list all user into my table, but my table is still empty. No errors!
<h:panelGrid columns="2" id="onlinePanel" >
<h:dataTable value="#{angemeldeteBenutzer.online}" var="on">
<h:column>
<f:facet name="header">Email</f:facet>
<h:outputText value="#{on.email}"></h:outputText>
</h:column>
</h:dataTable>
</h:panelGrid>
The mistake is here:
private static Controller instance = new Controller();
public static Controller getInstance() {
return instance;
}
private static AngemeldeteBenutzer ab = new AngemeldeteBenutzer();
public static AngemeldeteBenutzer getAb() {
return ab;
}
You seem to have missed the point of a bean management framework with dependency injection support. You seem to be expecting that #{angemeldeteBenutzer} in the JSF page is referring exactly the same instance as you manually created there with new operator and are filling with users.
This is Wrong! You have there two instances of the class, one automatically created by JSF and available via #{angemeldeteBenutzer} and another one manually created by yourself and available via that getAb() method only.
Get rid of all those static fields and methods. They don't belong there. Instead, use #ManagedProperty to let JSF inject managed beans in each other. Add this code to the Controller class.
#ManagedProperty("#{angemeldeteBenutzer}")
private AngemeldeteBenutzer ab;
public AngemeldeteBenutzer getAb() {
return ab;
}
public void setAb(AngemeldeteBenutzer ab) {
this.ab = ab;
}
And replace in the same Controller class this line
AngemeldeteBenutzer.getAb().hinzufuegen(benutzer);
by
ab.hinzufuegen(benutzer);
Note: if you're already on Java EE 7, consider using CDI #Named instead of JSF #ManagedBean. When injecting via #Inject instead of #ManagedProperty, you don't need those ugly getter/setter anymore.
#Named
#ApplicationScoped
public class AngemeldeteBenutzer {
}
#Named
#ApplicationScoped
public class Controller {
#Inject
private AngemeldeteBenutzer ab;
}
Unrelated to the concrete problem, the Controller doesn't seem to be a legit application scoped bean. It looks too much like a view scoped bean due that view-specific variables and business logic. Make sure you understand the scopes: How to choose the right bean scope?
I'm trying to create a custom component for displaying an Entity with a certain form. So I've created my #FacesComponent and he's working but only when he is not inside a loop like <ui:repeat>. When I'm using the following code, my component is displaying null values for price and photo but not for name. Do you have an explaination ?
XHTML code :
<ui:define name="content">
<f:view>
<h:form>
<ui:repeat value="#{dataManagedBean.listNewestCocktails}" var="item" varStatus="status">
<h:outputText value="#{item.price}"/> <!--working very well-->
<t:cocktailVignette idPrefix="newCocktails" name="foo" price="#{item.price}" urlPhoto="#{item.photoURI}"/> <!-- not working the getPrice here -->
</ui:repeat>
<!--<t:cocktailVignette idPrefix="allCocktails" name="OSEF" price="20" urlPhoto="osefdelurl" ></t:cocktailVignette> -->
</h:form>
</f:view>
My component code :
package component;
import java.io.IOException;
import javax.faces.context.FacesContext;
import javax.faces.component.FacesComponent;
import javax.faces.component.UIComponentBase;
import javax.faces.context.ResponseWriter;
#FacesComponent(value = "CocktailVignette")
public class CocktailVignette extends UIComponentBase {
private String idPrefix;
private String name;
private String price;
private String urlPhoto;
public String getIdPrefix() {
return idPrefix;
}
public void setIdPrefix(String idPrefix) {
this.idPrefix = idPrefix;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getUrlPhoto() {
return urlPhoto;
}
public void setUrlPhoto(String urlPhoto) {
this.urlPhoto = urlPhoto;
}
#Override
public String getFamily() {
return "CocktailVignette";
}
#Override
public void encodeBegin(FacesContext context) throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.write("<div id=\""+idPrefix+name+"\" class=\"cocktail-vignette\">");
writer.write("<h2>"+name+"</h2>");
writer.write("<h3>"+price+"</h3>");
writer.write("</div>");
}
}
Thanks a lot :) I'm trying but nothing is working ...
All of component's attributes which are sensitive to changes in state (e.g. the value being dependent on <ui:repeat var>, at least those which is not known during view build time but during view render time only), must delegate the storage of attribute value to the state helper as available by inherited getStateHelper() method.
Kickoff example:
public String getPrice() {
return (String) getStateHelper().eval("price");
}
public void setPrice(String price) {
getStateHelper().put("price", price);
}
Apply the same for all other attributes and get rid of the instance variable declarations. Important note is that the state helper key ("price" in above example) must be exactly the same as attribute name.
See also:
How to save state when extending UIComponentBase
I have the following problem!
On one of my sites i have a button:
<h:commandButton value="IDA Analyzer Results" action="#{SelectionBean.monitoringLog()}"/>
The method it calls with some part of the bean:
#ManagedBean(name = "SelectionBean")
#SessionScoped
public class TableSelectionBean {
private List<String> analyzerLog = new ArrayList<String>();
public String monitoringLog() throws FileNotFoundException, IOException{
String fileName = "/opt/IDA2/Linux/bin/"+"filtered_"+selectionMonitoringData.get(0).getMonitoringName()+"_result.txt";
if(selectionMonitoringData.get(0).getIsExecuted())
{
BufferedReader br = new BufferedReader(new FileReader(fileName));
try {
String line;
while ((line=br.readLine()) != null) {
getAnalyzerLog().add(line);
}
} finally {
br.close();
System.out.println(getAnalyzerLog());
}
}
return "analyzerresult.xhtml";
}
After i click this button as you can see it navigates me to an other page:
<h:body>
<h:form>
<h:commandButton value="hi" action="#{AnalyzerBean.myMethod()}"></h:commandButton>
</h:form>
</h:body>
Here is the Bean:
#ManagedBean(name = "AnalyzerBean")
#SessionScoped
public class AnalyzerResultBean {
#ManagedProperty(value="#{SelectionBean.analyzerLog}")
private List<String> analyzerLog;
public void myMethod(){
System.out.print(analyzerLog);
}
/**
* #return the analyzerLog
*/
public List<String> getAnalyzerLog() {
return analyzerLog;
}
/**
* #param analyzerLog the analyzerLog to set
*/
public void setAnalyzerLog(List<String> analyzerLog) {
this.analyzerLog = analyzerLog;
}
So when I'm trying to use this Managed property it says:
The scope of the object referenced by expression #{SelectionBean.analyzerLog}, view, is shorter than the referring managed beans (AnalyzerBean) scope of session but as you can see both of the is Session Scoped. What could be the problem?
If you use JSF 2.x and you want to navigate analyzerresult.xhtml page return analyzerresult
public String monitoringLog() throws FileNotFoundException, IOException{
return "analyzerresult";
}
.xhtml extension is not needed.
<h:selectManyListbox id="sectorsListBox" size="2" multiple="multiple" value="#{Mybean.classificationSelectedItems}">
<f:selectItems id="sectors" value="#{Mybean.classificationSelectItems}"/>
</h:selectManyListbox>
Backing Bean has:
public class Mybean
{
private Map<String,String> classificationSelectItems = new LinkedHashMap<String,String>();
private List<String> classificationSelectedItems = new ArrayList<String>();
//getter and setter for both.
}
init()
{
classificationSelectItems.put("INS","Insurance")
classificationSelectItems.put("HLC","HealthCare")
}
The select many box gets initialized with these 2 values but the problem is only the last selected entry is getting stored in classificationSelectedItems. Why is that so ? And how do I get all the selected entries stored in the list of classificationSelectedItems ?
Adding FYI, the init method is class by Spring.
I have tested with an examle(reference:http://www.mkyong.com/jsf2/jsf-2-multiple-select-listbox-example/), good luck :)
Facelets:
<h:form id="form">
<h:selectManyListbox value="#{user.favFood1}" >
<f:selectItems value="#{user.favFood2Value}" />
</h:selectManyListbox>
<h:commandButton value="test"/>
</h:form>
Bean:
#ManagedBean(name = "user")
#ViewScoped
public class UserBean implements Serializable {
private static final long serialVersionUID = 1L;
public List<String> favFood1;
private Map<String, Object> food2Value;
public UserBean() {
favFood1 = new ArrayList<String>();
food2Value = new LinkedHashMap<String, Object>();
food2Value.put("Food2 - Fry Checken", "Fry Checken1"); //label, value
food2Value.put("Food2 - Tomyam Soup", "Tomyam Soup2");
food2Value.put("Food2 - Mixed Rice", "Mixed Rice3");
}
public List<String> getFavFood1() {
return favFood1;
}
public void setFavFood1(List<String> favFood1) {
this.favFood1 = favFood1;
}
public Map<String, Object> getFavFood2Value() {
return food2Value;
}
}
I noticed exactly this behaviour when I used a Collection in the setter method, like
public void setClassificationSelectedItems(Collection<String> in){
// store it somewhere
}
This setter is called during the restore phase but not during the update phase, so the previously set value will be set, but never the new one. If you use a List, it works as expected:
public void setClassificationSelectedItems(List<String> in){
// store it somewhere
}
Note that you will need to redeploy the application after such a change because the JSP needs to be recompiled but this isn’t done automatically.