Question

我已经使用重定向机制开发了整个JSF项目，并且效果很好。由于我想提高性能，因此我认为前进机制是一种很好的方法。由于我遇到了一些问题，因此我需要一些帮助。我将展示如何在应用程序中使用导航：

    @Named(value = "customersView")
@RequestScoped
public class CustomersView implements Serializable {

public String onNewElement() {
        return "create?faces-redirect=true";
    }

    public String onEditElement(Customer seleceted) {
        this.selected = seleceted;
        FacesContext.getCurrentInstance().getExternalContext().getFlash().put("customer", seleceted);
        return "create?faces-redirect=true";
    }

这是我的list.xhtml文件：

<p:menuButton style="float:right;" icon="ui-icon-person-add"
                                value="Add customer">
                                <p:menuitem value="New" icon="ui-icon-create"
                                    outcome="#{customersView.onNewElement()}" />

然后，我具有处理创建客户的组件：

@Named
@javax.faces.view.ViewScoped
public class CreateCustomerView implements Serializable {

    @Inject
    CustomerController customerController;
    private Customer customer;
    private boolean edit;

@PostConstruct
    public void init() {
        edit = FacesContext.getCurrentInstance().getExternalContext().getFlash().containsKey("customer");
        if (edit) {
            this.customer = (Customer) FacesContext.getCurrentInstance().getExternalContext().getFlash()
                    .get("customer");
            FacesContext.getCurrentInstance().getExternalContext().getFlash().keep("customer");
        } else {
            this.customer = new Customer();
        }
        this.municipalities = new MunicipalityParser().parse();
        this.provinces = new ArrayList<>();
        for (Municipality municipality : municipalities) {
            if (!provinces.contains(municipality.getProvince())) {
                provinces.add(municipality.getProvince());
            }
        }
    }

    public String onCompletedSave() {
        customerController.store(customer);
        try {
            new CardCreator().createCard(customer);
        } catch (IOException e) {
            e.printStackTrace();
        }
        FacesContext.getCurrentInstance().addMessage(null,
                new FacesMessage(FacesMessage.SEVERITY_INFO,
                        "The customer " + customer.getSurnameAndName() + " has been saved correctly",
                        "Coorect!"));
        FacesContext.getCurrentInstance().getExternalContext().getFlash().setKeepMessages(true);
        return "list?faces-redirect=true";
    }

    public Customer getCustomer() {
        return customer;
    }

    public void setCustomer(Customer customer) {
        this.customer = customer;
    }

}

如何以最简单的方式切换到转发机制？

这是主菜单：

<pu:menu widgetVar="me">
                    <p:menuitem id="um_dashboard" value="Home" icon="&#xe8d1;"
                        outcome="/s/dashboard" />
                    <p:submenu id="registries" label="My menu" icon="&#xe7fd;">
                        <p:menuitem id="customers" value="Customers"
                            outcome="/s/customers/list" />
                        <p:menuitem id="children" value="Children"
                            outcome="/s/children/list" />
                        <p:menuitem id="schools" value="Scuole" outcome="/s/schools/list" />
                    </p:submenu>

是否可以为此实现这种机制？

如何在JSF中实现向前导航？

0 个答案: