JSF/JPA-Fehler: Die Klasse 'java.lang.String' nicht die Eigenschaft haben

Ich bin anzeigen einer Liste der Fußball-Spieler aus einer Datenbank, die der Benutzer auswählen kann, und fügen Sie zu einer ArrayList. Anzeige aller Spieler funktioniert gut, aber nicht für den ausgewählten. Wenn ich ihn für den nur-Objekt oder seinen hashcode, seine Erträge sein, aber sobald ich mich auf eine Eigenschaft in Bezug auf die Player-Einheit, gibt es einen Fehler. Wer?

Backing bean

@Named
@SessionScoped
public class PlayerBean implements Serializable {

private static final long serializableUID = 1L;
@Inject
PlayerFacade facade;

private List<Player> allPlayers;
private List<Player> selectedPlayers;

public PlayerBean() {
}

public List<Player> getAllPlayers() {
    return facade.findAll();
}


public List<Player> getSelectedPlayers() {
    return selectedPlayers;
}

public void setSelectedPlayers(List<Player> selectedPlayers) {
    this.selectedPlayers= selectedPlayers;
}

}

Entity-Klasse

@Entity
@Table(name = "player")
@XmlRootElement

public class Player implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@Column(name = "PlayerID")
private Integer playerID;
@Size(max = 45)
@Column(name = "Name")
private String name;
@Size(max = 45)
@Column(name = "Position")
private String position;
//@Max(value=?)  @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Column(name = "Weight")
private BigDecimal weight;

public Player() {
}

public Player(Integer playerID) {
    this.playerID = playerID;
}

public Integer getPlayerID() {
    return playerID;
}

public void setPlayerID(Integer playerID) {
    this.playerID = playerID;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getPosition() {
    return position;
}

public void setPosition(String position) {
    this.position = position;
}

public BigDecimal getWeight() {
    return weight;
}

public void setWeight(BigDecimal weight) {
    this.weight = weight;
}

@Override
public int hashCode() {
    int hash = 0;
    hash += (playerID != null ? playerID.hashCode() : 0);
    return hash;
}

@Override
public boolean equals(Object object) {
    //TODO: Warning - this method won't work in the case the id fields are not set
    if (!(object instanceof Player)) {
        return false;
    }
    Player other = (Player) object;
    if ((this.playerID == null && other.playerID != null) || (this.playerID != null && !this.playerID.equals(other.playerID))) {
        return false;
    }
    return true;
}

@Override
public String toString() {
    return "playerID=" + playerID + " ]";
}

}

JSF-Seite

<h:form id="allPlayers" style="text-align: center;" >
                    <h:selectManyCheckbox value="#{playerBean.selectedPlayers}">
                     <f:selectItems value="#{playerBean.allPlayers}" var="p" itemLabel="#{p.name} #{p.position} #{p.weight}" />
                    </h:selectManyCheckbox>
                    <h:commandButton value="Add to Team" action="team"/>
                </h:form>
            </p>
            <p>
                <h:form id="selectedPlayers" style="text-align: center;" >
                    <h:dataTable value="#{playerBean.selectedPlayers}" var="players">
                        <h:column>
                            #{players}
                        </h:column>
                        <h:column>
                            #{players.name}
                        </h:column>
                    </h:dataTable>
                    <h:commandButton value="Set Team" action="team"/>
                </h:form>

Fehlermeldung

javax.el.ELException: /team.xhtml: The class 'java.lang.String' does not have the property 'name'.
at com.sun.faces.facelets.compiler.TextInstruction.write(TextInstruction.java:88)
at com.sun.faces.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:82)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:302)
at com.sun.faces.renderkit.html_basic.TableRenderer.renderRow(TableRenderer.java:385)
at com.sun.faces.renderkit.html_basic.TableRenderer.encodeChildren(TableRenderer.java:162)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:894)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:176)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:894)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1856)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1859)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:443)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:337)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:219)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:647)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:724)

InformationsquelleAutor user3093851 | 2013-12-12