添加此ActionListener时出现错误

时间:2013-05-01 08:56:54

标签: java hibernate jsf

我的代码如下:

 <h:commandButton type="submit" action="#{clController.getPaymentByMonth(clController.type)}"  id="stateInfo"  value="Show Monthly "  >
  <f:actionListener binding="#{clController.getTotal(clController.type)}" />
</h:commandButton>

当我添加<f:actionListener binding="时,它会出现以下错误:

at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:114)
    at com.sun.faces.facelets.tag.jsf.core.ActionListenerHandler$LazyActionListener.processAction(ActionListenerHandler.java:112)
    at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
    at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:769)

这是我的getTotal函数:

 List<CustomerPayment> total = null;
        try {
            org.hibernate.Transaction tx = session.beginTransaction();
            Query q = session.createQuery("SELECT SUM(amount) from CustomerPayment where DATE like '%"+year+"' GROUP BY type");
            total = (List<CustomerPayment>) q.list();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return totalDataTable = new ListDataModel(total);

可能是什么问题?

1 个答案:

答案 0 :(得分:2)

问题在于actionListener的{​​{1}}属性的值 - 它应该指向一个实现binding接口的对象 - 而不是你的情况下的方法调用。 / p>

来自JSF规范:

  

值绑定表达式,其求值为实现javax.faces.event.ActionListener的对象。