Question

我在实现DataTable示例时遇到问题 - 从Primefaces网站选择：http://www.primefaces.org/showcase/ui/data/datatable/selection.xhtml

我按照描述创建了两个类：SelectionView.java and CarService.java，但我的Netbeans 8.0.1在课堂上显示错误：

SelectionView.java：package import org.primefaces.showcase.domain.Car 不存在包导入 org.primefaces.showcase.service.CarService不存在

CarService.java中相同：

包导入org.primefaces.showcase.domain.Car不存在

然而类似的进口如：

import org.primefaces.event.SelectEvent;
import org.primefaces.event.UnselectEvent;

工作正常。

使用Netbeans 8.0.1并在Primefaces 5.0库中进行buiilt。

这是代码：的 SelectionView.java

package main;

import java.io.Serializable;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.ViewScoped;
import javax.faces.context.FacesContext;
import org.primefaces.event.SelectEvent;
import org.primefaces.event.UnselectEvent;
import org.primefaces.showcase.domain.Car;
import org.primefaces.showcase.service.CarService;

@ManagedBean(name="dtSelectionView")
@ViewScoped
public class SelectionView implements Serializable {

    private List<Car> cars1;
    private List<Car> cars2;
    private List<Car> cars3;
    private List<Car> cars4;
    private List<Car> cars5;
    private List<Car> cars6;
    private Car selectedCar;
    private List<Car> selectedCars;

    @ManagedProperty("#{carService}")
    private CarService service;

    @PostConstruct
    public void init() {
        cars1 = service.createCars(10);
        cars2 = service.createCars(10);
        cars3 = service.createCars(10);
        cars4 = service.createCars(10);
        cars5 = service.createCars(10);
        cars6 = service.createCars(10);
    }

    public List<Car> getCars1() {
        return cars1;
    }

    public List<Car> getCars2() {
        return cars2;
    }

    public List<Car> getCars3() {
        return cars3;
    }

    public List<Car> getCars4() {
        return cars4;
    }

    public List<Car> getCars5() {
        return cars5;
    }

    public List<Car> getCars6() {
        return cars6;
    }

    public void setService(CarService service) {
        this.service = service;
    }

    public Car getSelectedCar() {
        return selectedCar;
    }

    public void setSelectedCar(Car selectedCar) {
        this.selectedCar = selectedCar;
    }

    public List<Car> getSelectedCars() {
        return selectedCars;
    }

    public void setSelectedCars(List<Car> selectedCars) {
        this.selectedCars = selectedCars;
    }

    public void onRowSelect(SelectEvent event) {
        FacesMessage msg = new FacesMessage("Car Selected", ((Car) event.getObject()).getId());
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }

    public void onRowUnselect(UnselectEvent event) {
        FacesMessage msg = new FacesMessage("Car Unselected", ((Car) event.getObject()).getId());
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }
}

CarService.java

package main;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.UUID;
import javax.faces.bean.ApplicationScoped;
import javax.faces.bean.ManagedBean;
import org.primefaces.showcase.domain.Car;

@ManagedBean(name = "carService")
@ApplicationScoped
public class CarService {

    private final static String[] colors;

    private final static String[] brands;

    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";

        brands = new String[10];
        brands[0] = "BMW";
        brands[1] = "Mercedes";
        brands[2] = "Volvo";
        brands[3] = "Audi";
        brands[4] = "Renault";
        brands[5] = "Fiat";
        brands[6] = "Volkswagen";
        brands[7] = "Honda";
        brands[8] = "Jaguar";
        brands[9] = "Ford";
    }

    public List<Car> createCars(int size) {
        List<Car> list = new ArrayList<Car>();
        for(int i = 0 ; i < size ; i++) {
            list.add(new Car(getRandomId(), getRandomBrand(), getRandomYear(), getRandomColor(), getRandomPrice(), getRandomSoldState()));
        }

        return list;
    }

    private String getRandomId() {
        return UUID.randomUUID().toString().substring(0, 8);
    }

    private int getRandomYear() {
        return (int) (Math.random() * 50 + 1960);
    }

    private String getRandomColor() {
        return colors[(int) (Math.random() * 10)];
    }

    private String getRandomBrand() {
        return brands[(int) (Math.random() * 10)];
    }

    public int getRandomPrice() {
        return (int) (Math.random() * 100000);
    }

    public boolean getRandomSoldState() {
        return (Math.random() > 0.5) ? true: false;
    }

    public List<String> getColors() {
        return Arrays.asList(colors);
    }

    public List<String> getBrands() {
        return Arrays.asList(brands);
    }
}

有什么想法吗？：（

谢谢！

Answer 1

您正尝试从primefaces展示中导入类：

import org.primefaces.showcase.domain.Car;
import org.primefaces.showcase.service.CarService;

您的项目中没有这些。删除2个导入。

示例DataTable - 无法编译Primefaces中的选择

1 个答案: