异常类'java.lang.String'没有属性'type' [英] Exception The class 'java.lang.String' does not have the property 'type'

问题描述

尝试获取对象值时发生异常. 当我们的应用程序只包含Web应用程序时，它就起作用了，但是当我们将带有APP-INF/lib的ejb包添加到application.xml中时，出现了异常:javax.el.PropertyNotFoundException:类'java.lang.String'没有具有属性类型".在我的调查中:item的值为String，但不是getItems方法返回的对象.为什么可能发生此异常.

Exception occurs while trying to get object value. It worked before when our application has only web-application in ear, but when we add ejb package with APP-INF/lib into application.xml exception appears: javax.el.PropertyNotFoundException: The class 'java.lang.String' does not have the property 'type'. In my investigation here: item value is String but not object returned by getItems method. Why this exception may occurs.

感谢任何想法.

这是jsp页面的代码.

Here is the code of jsp page.

<div id="report_items">
<c:forEach items="#{repcatTree.items}" var="item">
   <div style="padding-top:7px; padding-bottom:7px; padding-right:15px;">
      <span class="report_item_category_class">
         <h:commandLink rendered="#{item.type == 'category'}" action="#{item.onNodeClicked}" 
               styleClass="default_link">
            <h:graphicImage url="/views/tree/images/folder_big.gif" />
            <h:outputText value="#{item.attributes.FILE_NAME}" style="font-size:14px; font-weight:bold; padding-left:5px" />
         </h:commandLink>
         <h:commandLink rendered="#{item.type == 'report'}" styleClass="default_link" 
                    action="action_report_run" title="#{item.cells['report_name'].toolTip}">
            <h:graphicImage url="/icon?rdd_path=#{item.attributes.RDD_PATH}" />               
            <h:outputText value="#{item.cells['report_name'].display}"
                             style="font-size:14px; font-weight:bold; padding-left:5px" />

            <f:param name="nodePath" value="#{item.attributes.RDD_PATH}" />
            <f:param name="nodePrettyPath" value="#{item.attributes.CAT_PATH}" />
          </h:commandLink>
      </span>
   </div>
</c:forEach>
</div>

这是我的课程.我不需要删除代码的一部分.

Here is my class. I remove no needed part of code.

public class RepcatTreeModel extends TreeModel implements Serializable {

   public RepcatTreeModel() {
      super();
   }

   public Collection getItems() {
       items = new ArrayList();
       items.addAll(getActiveNode().getChildren());
       items.addAll(getTableModel().getRows());
       Object[] _items = items.toArray();
       Arrays.sort(_items, new Comparator() {
           public int compare(Object o1, Object o2) {
               int result = 0;
               if (o1 instanceof TreeNodeModel && o2 instanceof TreeNodeModel) {
                   TreeNodeModel nodeA = (TreeNodeModel)o1;
                   TreeNodeModel nodeB = (TreeNodeModel)o2;
                   String strA = (String)nodeA.getAttributes().get(RepcatTreeModel.ATTR_NAME);
                   String strB = (String)nodeB.getAttributes().get(RepcatTreeModel.ATTR_NAME);

                   if (strB.compareToIgnoreCase(strA) < 0)
                       result = 1;
                   else
                       if (strB.compareToIgnoreCase(strA) > 0)
                           result = -1;
               }
               else
                   if (o1 instanceof RowModel && o2 instanceof RowModel) {
                       RowModel nodeA = (RowModel)o1;
                       RowModel nodeB = (RowModel)o2;
                       String strTmp = (String)nodeA.getAttributes().get(RepcatTreeModel.ROW_ATTR_RDD_PATH);
                       String strA = strTmp.substring(strTmp.lastIndexOf('/')+1);
                       strTmp = (String)nodeB.getAttributes().get(RepcatTreeModel.ROW_ATTR_RDD_PATH);
                       String strB = strTmp.substring(strTmp.lastIndexOf('/')+1);

                       if (strB.compareToIgnoreCase(strA) < 0)
                           result = 1;
                       else
                           if (strB.compareToIgnoreCase(strA) > 0)
                               result = -1;
                   }
               return result;
          }
       });
       items = new ArrayList(Arrays.asList(_items));
       return items;
   }

}

推荐答案

#{repcatTree.items}返回字符串对象列表.

#{repcatTree.items} returns a List of String objects.

在两个<h:commandLink>组件上，从

rendered="#{item.type == 'category'}" 

到

rendered="#{item eq 'category'}"

这篇关于异常类'java.lang.String'没有属性'type'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！