我正在尝试为带有 primefaces 的数据表实现行选择，但是当我单击一行时，什么也没有显示。我已将其缩小到未调用所选汽车的设置器，但我不知道如何设置它。这是我的代码，有人可以帮忙吗？
表豆
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(name="TableBean")
@ViewScoped
public class ViewCDeployments 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 ViewCDeployments() {
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;
}
}
汽车.java
import java.io.Serializable;
public class Car implements Serializable {
/**
*
*/
private static final long serialVersionUID = 240545116337689611L;
private String model;
private int year;
private String manufacturer;
private String color;
private int price;
public Car(String model, int year, String manufacturer, String color) {
this.model = model;
this.year = year;
this.manufacturer = manufacturer;
this.color = color;
}
public Car(String model, int year, String manufacturer, String color, int price) {
this.model = model;
this.year = year;
this.manufacturer = manufacturer;
this.color = color;
this.price = price;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
public String getManufacturer() {
return manufacturer;
}
public void setManufacturer(String manufacturer) {
this.manufacturer = manufacturer;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
@Override
public boolean equals(Object obj) {
if(obj == null)
return false;
if(!(obj instanceof Car))
return false;
Car compare = (Car) obj;
return compare.model.equals(this.model);
}
@Override
public int hashCode() {
int hash = 1;
return hash * 31 + model.hashCode();
}
@Override
public String toString() {
return "Car{" + "model=" + model + ", year=" + year + ", manufacturer=" + manufacturer + ", color=" + color + ", price=" + price + '}';
}
}
汽车数据模型
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 = -5147159758418722534L;
public CarDataModel() {
}
public CarDataModel(List<Car> data) {
super(data);
}
@SuppressWarnings("unchecked")
@Override
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();
}
}
XHTML
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:ui="http://java.sun.com/jsf/facelets">
<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=":frmContent:form:displaySingle" oncomplete="singleCarDialog.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">
Header
</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>
</h:form>
</ui:composition>