我在 Tomcat 7.0.23 上尝试这个例子。单击一行时不会填充对话框“dialog”和“multiDialog”，因为 getWrappedData() 返回 null。这是List<Car> cars = (List<Car>) getWrappedData();CarDataModel 的方法 getRowData 中的一行。
如果我使用 rowKey 属性而不是绑定，它可以工作。
<p:dataTable id="cars" var="car" value="#{tableBean.cars}" paginator="true" rows="10"
selection="#{tableBean.selectedCar}"
rowKey="#{car.model}">
问题是什么？
这是我的 pom.xml 中的一个片段
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-api</artifactId>
<version>2.1.13</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.sun.faces</groupId>
<artifactId>jsf-impl</artifactId>
<version>2.1.13</version>
<scope>compile</scope>
</dependency>
我的汽车数据模型
package data;
import java.io.Serializable;
import java.util.List;
import javax.faces.model.ListDataModel;
import org.primefaces.model.SelectableDataModel;
public class CarDataModel extends ListDataModel<Car> implements SelectableDataModel<Car>, Serializable{
private static final long serialVersionUID = -6094333899604122284L;
public CarDataModel() {
}
public CarDataModel(List<Car> data) {
super(data);
}
@Override
@SuppressWarnings("unchecked")
public Car 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<Car> cars = (List<Car>) getWrappedData();
for (Car car : cars) {
if (car.getModel().equals(rowKey))
return car;
}
return null;
}
@Override
public Object getRowKey(Car car) {
return car.getModel();
}
}
我的 TableBean
package data;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
@ManagedBean
@ViewScoped
public class TableBean implements Serializable {
private static final long serialVersionUID = 2213388781051004157L;
private final static String[] colors;
private final static String[] manufacturers;
static {
colors = new String[10];
colors[0] = "Black";
colors[1] = "White";
colors[2] = "Green";
colors[3] = "Red";
colors[4] = "Blue";
colors[5] = "Orange";
colors[6] = "Silver";
colors[7] = "Yellow";
colors[8] = "Brown";
colors[9] = "Maroon";
manufacturers = new String[10];
manufacturers[0] = "Mercedes";
manufacturers[1] = "BMW";
manufacturers[2] = "Volvo";
manufacturers[3] = "Audi";
manufacturers[4] = "Renault";
manufacturers[5] = "Opel";
manufacturers[6] = "Volkswagen";
manufacturers[7] = "Chrysler";
manufacturers[8] = "Ferrari";
manufacturers[9] = "Ford";
}
private List<Car> cars;
private Car selectedCar;
private Car[] selectedCars;
private CarDataModel mediumCarsModel;
public TableBean() {
cars = new ArrayList<Car>();
populateRandomCars(cars, 50);
mediumCarsModel = new CarDataModel(cars);
}
public Car[] getSelectedCars() {
return selectedCars;
}
public void setSelectedCars(Car[] selectedCars) {
this.selectedCars = selectedCars;
}
public Car getSelectedCar() {
return selectedCar;
}
public void setSelectedCar(Car selectedCar) {
this.selectedCar = selectedCar;
}
private void populateRandomCars(List<Car> list, int size) {
for(int i = 0 ; i < size ; i++)
list.add(new Car(getRandomModel(), getRandomYear(), getRandomManufacturer(), getRandomColor()));
}
private int getRandomYear() {
return (int) (Math.random() * 50 + 1960);
}
private String getRandomColor() {
return colors[(int) (Math.random() * 10)];
}
private String getRandomManufacturer() {
return manufacturers[(int) (Math.random() * 10)];
}
private String getRandomModel() {
return UUID.randomUUID().toString().substring(0, 8);
}
public CarDataModel getMediumCarsModel() {
return mediumCarsModel;
}
public List<Car> getCars() {
return cars;
}
}
我的 datatableRowSelectionRadioCheckbox.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
template="/WEB-INF/templates/template.xhtml">
<ui:define name="title">DataTable - RadioCheckbox</ui:define>
<ui:define name="content">
<h:form id="form">
<p:dataTable id="cars" var="car" value="#{TableBean.mediumCarsModel}" paginator="true" rows="10"
selection="#{TableBean.selectedCar}">
<f:facet name="header">
RadioButton Based Selection
</f:facet>
<p:column selectionMode="single" style="width:18px" />
<p:column headerText="Model">
#{car.model}
</p:column>
<p:column headerText="Year">
#{car.year}
</p:column>
<p:column headerText="Manufacturer" >
#{car.manufacturer}
</p:column>
<p:column headerText="Color">
#{car.color}
</p:column>
<f:facet name="footer">
<p:commandButton id="viewCommand" value="View" icon="ui-icon-search"
update=":form:displaySingle" oncomplete="singleCarDialog.show()"/>
</f:facet>
</p:dataTable>
<p:dataTable id="multiCars" var="car" value="#{TableBean.mediumCarsModel}" paginator="true" rows="10"
selection="#{TableBean.selectedCars}">
<f:facet name="header">
Checkbox Based Selection
</f:facet>
<p:column selectionMode="multiple" style="width:18px" />
<p:column headerText="Model">
#{car.model}
</p:column>
<p:column headerText="Year">
#{car.year}
</p:column>
<p:column headerText="Manufacturer" >
#{car.manufacturer}
</p:column>
<p:column headerText="Color">
#{car.color}
</p:column>
<f:facet name="footer">
<p:commandButton id="multiViewButton" value="View" icon="ui-icon-search"
update=":form:displayMulti" oncomplete="multiCarDialog.show()"/>
</f:facet>
</p:dataTable>
<p:dialog id="dialog" header="Car Detail" widgetVar="singleCarDialog" resizable="false"
showEffect="fade" hideEffect="explode">
<h:panelGrid id="displaySingle" columns="2" cellpadding="4">
<f:facet name="header">
<ui:param name="resourceName" value="images:cars/#{TableBean.selectedCar.manufacturer}.jpg"/>
<p:graphicImage value="#{resource[resourceName]}"/>
</f:facet>
<h:outputText value="Model:" />
<h:outputText value="#{TableBean.selectedCar.model}" />
<h:outputText value="Year:" />
<h:outputText value="#{TableBean.selectedCar.year}" />
<h:outputText value="Manufacturer:" />
<h:outputText value="#{TableBean.selectedCar.manufacturer}" />
<h:outputText value="Color:" />
<h:outputText value="#{TableBean.selectedCar.color}" />
</h:panelGrid>
</p:dialog>
<p:dialog id="multiDialog" header="Car Detail" widgetVar="multiCarDialog"
height="300" showEffect="fade" hideEffect="explode">
<p:dataList id="displayMulti"
value="#{TableBean.selectedCars}" var="selectedCar">
Model: #{selectedCar.model}, Year: #{selectedCar.year}
</p:dataList>
</p:dialog>
</h:form>
</ui:define>
</ui:composition>
我的模板.xhtml
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
[
<!ENTITY nbsp " ">
]>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets">
<ui:insert name="metadata"/>
<h:head>
<title>My Primefaces</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<h:outputStylesheet name="css/default.css" />
<h:outputStylesheet name="css/primefaces.css" />
<h:outputStylesheet name="css/syntaxhighlighter.css" />
<h:outputStylesheet name="css/theme.css" />
</h:head>
<h:body>
<div id="header" class="ui-widget ui-widget-header">
<div id="logo">
<img src="#{resource['images:logo.png']}" alt="Logo" />
</div>
</div>
<div id="page" class="ui-widget">
<ui:include src="/sidebar/mainmenu.xhtml"/>
<div id="content">
<div class="post">
<h1 class="title ui-widget-header ui-corner-all"><ui:insert name="title">Title</ui:insert></h1>
<div class="entry" style="line-height:200%">
<ui:insert name="content">Main Content</ui:insert>
</div>
</div>
</div>
<div style="clear: both;"> </div>
</div>
<div id="footer" class="ui-widget ui-widget-header ui-corner-all">
<p class="copyright">My test of PrimeFaces-3.4</p>
</div>
</h:body>
</html>