假设我有两个selectOneMenu标签绑定到两个不同的列表(例如,产品和部门)。

我想防止根据所选产品选择某些部门,反之亦然。我该把逻辑放在哪里?

最佳答案

不知道这是否是您要解决的方法。但是您可以根据产品的选择加载部门列表。为此,您需要在选择产品时发送Ajax请求以更新“部门”列表。为了说明这一点,我将使用PrimeFaces发出ajax请求

<h:selectOneMenu id="product" value="#{bean.selectedProduct}">
    <f:selectItem itemLabel="Select Product" itemValue="" />
    <f:selectItems value="#{bean.productList}"/>
    <!-- here is where I send out ajax request -->
    <p:ajax listener="#{bean.loadDepartmentById}" event="change" update="department" />
</h:selectOneMenu>

<h:selectOneMenu id="department" value="#{bean.selectedDepartment}">
    <f:selectItem itemLabel="" itemValue="" />
    <f:selectItems value="#{bean.departmentList}"/>
</h:selectOneMenu>


这是我的豆子

@ManagedBean
@ViewScoped
public class bean{
    private List<SelectItem> productList = null;
    private List<SelectItem> departmentList = null;
    private Long selectedProduct = null;
    private Long selectedDepartment = null;

    @PostConstruct
    public void init(){
        //Pre load product list
        productList = new ArrayList<SelectItem>();
        productList.add(new SelectItem("value1", "label1"));
        productList.add(new SelectItem("value2", "label2"));
        productList.add(new SelectItem("value3", "label3"));
        //The values are the keys passed to the selectItem property.
        //The labels are those what you see on the menu.
    }

    public void loadDepartmentById(){
        if(selectedProduct != null){
            //Load the appropriate list of department.
        }
    }

}

关于java - 互斥的jsf selectOneMenu项目,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/5419715/

10-11 04:32