Question

我正在使用JSF 2.2和PrimeFaces 6.1。我想创建一个DataTable，其中最后一行始终是添加新行。

例如，假设我有2个实体Purchase和Article，这两个实体与多对多关系相关。在Purchase的视图中，我会有一个文章列表（数据表），在启动表时为空，我希望空表包含一行添加新文章，这个＆＃34;添加行＆＃34;应始终在那里添加新文章。

文章表有3列：名称，金额和价格。

购买实体是：

    @Entity
    @Table(name="purchase")
    public class Purchase implements Serializable {

        private static final long serialVersionUID = 1L;

        @Id
        @GeneratedValue(strategy = GenerationType.AUTO)
        private Long id;
        private int numberArticle;
        @Temporal(TemporalType.DATE)
        private Date datePurchase;

        @ManyToMany
        @JoinTable(name = "join_purchase_article",
                   joinColumns = @JoinColumn(name = "purchase_id"),
                   inverseJoinColumns = @JoinColumn(name = "article_id"))
        private List<Article> listArticles =  new ArrayList();
    }

文章的实体：

@Entity
@Table(name="article")
public class Article implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private int price;
    private int amount;

    @ManyToMany(mappedBy = "listArticles")
    private List<Purchase> listPurchase =  new ArrayList();
}

我的XHTML页面如下：

<h:form>
    <p:panel>
        <p:dataTable id="idTable" value="#{addPurchaseController.listArticlePurchase}" var="article">
            <p:column headerText="Name">
                <h:outputText value="#{article.name}"/>
            </p:column>
            <p:column headerText="Amount">
                 <h:outputText value="#{article.amount}"/>
            </p:column>
            <p:column headerText="Price">
                <h:outputText value="#{article.price}"/>
            </p:column>            
        </p:dataTable>
    </a:panel>
</h:form>

Managed Bean：

@ManagedBean(name = "addPurchaseController")
@ViewScoped
public class AddPurchaseController implements Serializable {

    private List<Article> listArticlePurchase;

    @PostConstruct
    public void init() {
        initialisation();
    }

    private void initialisation() {
        listArticlePurchase= new ArrayList();
    }
}

DataTable的最后一行始终是ADD NEW ROW

0 个答案: