我有如下XML:
<As>
<a>
<Bs>
<b>5</b>
<Bs>
</a>
<a>
<Bs>
<b>9</b>
<Bs>
</a>
<a></a>
<a>
<Bs>
<b>12</b>
<b>14</b>
<b>15</b>
</Bs>
</a>
现在我要删除节点选择的行。假设用户已选择节点<b>14</b>
。
我已将表达式生成为:
String expression = "/As/a[4]/Bs/b[2]";
Node node = (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);
node.getParentNode().removeChild(node);
它给出了以下例外:
javax.xml.transform.TransformerException: Extra illegal tokens: 'health-history-questions', '/', 'health-history-question', '[', '3', ']'
at org.apache.xpath.compiler.XPathParser.error(XPathParser.java:610)
at org.apache.xpath.compiler.XPathParser.initXPath(XPathParser.java:145)
at org.apache.xpath.XPath.<init>(XPath.java:178)
at org.apache.xpath.XPath.<init>(XPath.java:266)
at org.apache.xpath.jaxp.XPathImpl.eval(XPathImpl.java:195)
at org.apache.xpath.jaxp.XPathImpl.evaluate(XPathImpl.java:281)
答案 0 :(得分:1)
抱歉伙计问题是......表达式表单缺少'/'。所以我的错误。我道歉。
答案 1 :(得分:0)
为什么要使用这么复杂的XPath?试试这个
String expression = "//b[.=14]";
或者,如果你必须检查正确的层次结构,那么这个:
String expression = "/As/a/Bs/b[.=14]";