java - 从特定位置的 xml 中删除节点

Question

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>

现在我想删除节点选择的行。假设用户选择了节点 <b>14</b> .

我生成的表达式为:

String expression  =  "/As/a[4]/Bs/b[2]";
Node node = (Node) xpath.evaluate(expression, doc, XPathConstants.NODE);
node.getParentNode().removeChild(node);

它给出以下异常:

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)

Answer 1

抱歉，伙计们，问题是.. 表达式形式缺少'/'。所以我的错误。我很抱歉。