当jsf中的另一个菜单更改时，如何更新selectOneMenu

Question

我知道这是查询已经在这里回答但我不知道为什么我的代码没有工作

我有两个列表，当第一个列表改变时，其他列表会更新，这是我的代码

<h:selectOneMenu id="e4" styleClass="col-md-5" value="#{categoryModel.selectedMenu}">
    <f:selectItem />
    <f:selectItems value="#{categoryModel.catFinanceVect}" var="catFinance"itemLabel="#{catFinance.designation}" itemValue="#{catFinance.ligne}" />
    <!--  <a4j:ajax event="valueChange" render="e3" execute="@this" />-->
    <f:ajax event="valueChange" execute="@this" render="e3" listener="#{categoryModel.getCatItList}"/>
</h:selectOneMenu>
<div class="col-md-1"></div>
<h:selectOneMenu id="e3" styleClass="col-md-6">
    <f:selectItem />
    <f:selectItems value="#{categoryModel.catItVect}" var="catIt"itemLabel="#{catIt.designation}" itemValue="#{catIt.designation}" />
</h:selectOneMenu>

这是我的后盾：

@ManagedBean
@SessionScoped
public class CategoryModel {


    private CatFinance catFinance= new CatFinance();
    private Vector<CatFinance> catFinanceVect = new Vector<CatFinance>();
    private CatIt catIt= new CatIt();
    private Vector<CatIt> catItVect = new Vector<CatIt>();
    private Integer selectedMenu;



    public CategoryModel() {
        super();
        // TODO Auto-generated constructor stub
    }


    public CatFinance getCatFinance() {
        return catFinance;
    }


    public void setCatFinance(CatFinance catFinance) {
        this.catFinance = catFinance;
    }


    public Vector<CatFinance> getCatFinanceVect() {
        return catFinanceVect;
    }


    public void setCatFinanceVect(Vector<CatFinance> catFinanceVect) {
        this.catFinanceVect = catFinanceVect;
    }

public CatIt getCatIt() {
        return catIt;
    }


    public void setCatIt(CatIt catIt) {
        this.catIt = catIt;
    }


    public Vector<CatIt> getCatItVect() {
        return catItVect;
    }


    public void setCatItVect(Vector<CatIt> catItVect) {
        this.catItVect = catItVect;
    }



public Integer getSelectedMenu() {
        return selectedMenu;
    }


    public void setSelectedMenu(Integer selectedMenu) {
        this.selectedMenu = selectedMenu;
    }


public void getCatFinanceList(){

        this.setCatFinance(new CatFinance());
        CatFinanceService catFinanceService = (CatFinanceService) SpringDaoCtxFactory.getDaoContext().getBean("CatFinanceService");
        this.getCatFinanceVect().clear();

        try {
            this.getCatFinanceVect().addAll(catFinanceService.getCatFinanceList());
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

        public void getCatItList(AjaxBehaviorEvent event){

            this.setCatIt(new CatIt());
            CatItService catItService = (CatItService) SpringDaoCtxFactory.getDaoContext().getBean("CatItService");
            this.getCatItVect().clear();
            System.out.println("aaaa");
            try {
                this.getCatItVect().addAll(catItService.getCatItList(2));
            } catch (Exception e) {
                e.printStackTrace();
            }

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

}

如果有人能在这方面提供帮助，或者给我一个很好的教程，我会非常感激的，提前谢谢

Answer 1

f:ajax事件无效。它应该是change（或为h:selectOneMenu，默认为change，为空）

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