Question

我正在尝试打印一个简单的dataTable。我已经创建了两个类Product和ProductController，我将List传递给但是每当我运行代码时，它只打印dataTable列标题值，但不打印应该从List中获取的数据。

我正在使用Wildfly 10.0.1服务器

index.xhtml代码

<html xmlns="http://www.w3.org/1999/xhtml"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html">
<body>
<h:form>

<h:dataTable var="p" value="#{ProductController.findAll()}" border = "1" cellpadding="2">
        <h:column>
            <f:facet name="header">Id</f:facet>
            <h:outputText value="#{p.id}"></h:outputText>

        </h:column>

        <h:column>
            <f:facet name="header">Name</f:facet>
            <h:outputText value="#{p.name}"></h:outputText>

        </h:column>
        <h:column>
            <f:facet name="header">Price</f:facet>
            <h:outputText value="#{p.price}"></h:outputText>

        </h:column>

    </h:dataTable>
</h:form>
</body>
</html>

产品类

package entities;
public class Product {

    private String id;
    private String name;


    public String getId() {
            return id;
    }

    public void setId(String id) {
        System.out.println("I am here");
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public Product(String id, String name) {
        super();
        this.id = id;
        this.name = name;
        //this.price = price;
    }

    public Product() {
        super();
    }   
}

ProductController类

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

import entities.Product;
@ManagedBean
@SessionScoped

public class ProductController {

    private Product product = new Product();

    public ProductController() {
        super();
    }

    public Product getProduct() {
        return product;
    }

    public void setProduct(Product product) {
        this.product = product;
    }

    public List<Product> findAll()
    {   
     List<Product> listProduct = new ArrayList<Product>(); 
     try {
     listProduct.add (new Product("p1", "product1"));
     listProduct.add (new Product("p2", "product2"));
     listProduct.add (new Product("p3", "product3"));
    }

    catch(NullPointerException e) 
    {
        System.out.println("its Null");
        }

    return listProduct;
    }

}

ps：这是youtube视频代码，但它没有在我的机器上运行，

h：dataTable无法打印数据

0 个答案: