JSF 静态列表不会显示在数据表中

Question

我正在尝试获取一个列表以显示在从托管 bean 到 JSF 页面的数据表中，但它不起作用。 它告诉我"没有找到记录"。

JSF 管理的 bean ：

@ManagedBean
@RequestScoped
public class TestController {
private List<Rhnom> list = new ArrayList<Rhnom>();
@SuppressWarnings("serial")
private List<String> list2 = new ArrayList<String>() {{
add("s1");
add("s2");
add("s3");
}}; 
//getters and setters

JSF 页面 ：

<p:dataTable value="#{tesController.list2}" var="type">
<p:column headerText="Lib">
<h:outputText value="#{type}">
</h:outputText>
</p:column>
</p:dataTable>

Answer 1

我认为您在实现方面存在问题

链接

https://www.primefaces.org/showcase/ui/data/datatable/basic.xhtml

例

<p:dataTable var="car" value="#{dtBasicView.cars}">
<p:column headerText="Id">
<h:outputText value="#{car.id}" />
</p:column>

<p:column headerText="Year">
<h:outputText value="#{car.year}" />
</p:column>

<p:column headerText="Brand">
<h:outputText value="#{car.brand}" />
</p:column>

<p:column headerText="Color">
<h:outputText value="#{car.color}" />
</p:column>
</p:dataTable>

管理豆

@Named("dtBasicView")
@ViewScoped
public class BasicView implements Serializable {

private List<Car> cars;

@Inject
private CarService service;

@PostConstruct
public void init() {
cars = service.createCars(10);
}

public List<Car> getCars() {
return cars;
}

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

爪哇类

@Named
@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)];
}

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

private 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);
}
}