Java 错误：org.apache.xerces.dom.DeferredTextImpl 无法转换为 org.w3c.dom.Element
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Error: org.apache.xerces.dom.DeferredTextImpl cannot be cast to org.w3c.dom.Element
提问by ron
XML:
XML：
<nativeInformation>
<detail id="natural:fieldFormat">A</detail>
</nativeInformation>
I am trying to get the "id" value. but keep getting this error: org.apache.xerces.dom.DeferredTextImpl cannot be cast to org.w3c.dom.Element
我正在尝试获取“id”值。但不断收到此错误：org.apache.xerces.dom.DeferredTextImpl cannot be cast to org.w3c.dom.Element
My code:
我的代码：
for (int i = 0; i < nodeList.getLength(); i++) {
String s;
Node n = nodeList.item(i);
Attr attrName = ((Element) n).getAttributeNode("id");
if (attrName.getValue()!=null) {
s = attrName.getValue();
System.out.println(s);
}
}
If I write : System.out.println("parent node is "+n.getParentNode()); inside the for loop that will give me, [detail: null]
如果我写： System.out.println("parent node is "+n.getParentNode()); 在给我的 for 循环中，[详细信息：空]
Any help will be really appreciated.
任何帮助将不胜感激。
采纳答案by Naren
Before downcasting to Element ,check this
在向下转换到 Element 之前，检查这个
Hint:- Just need to check the Nodeis an Element or not . Following is the way to convert Node into Element.
提示：- 只需要检查 Nodeis an Element 与否。下面是将 Node 转换为 Element 的方法。
NodeList nodes = root.getChildNodes();
for (int i = 0; i < nodes.getLength(); i++) {
if(nodes.item(i).getNodeType() == Node.ELEMENT_NODE){
Element element = (Element) nodes.item(i);
..............................................
}
]
