使用 java 在 xml 中搜索结束排除

我正在尝试在xml文件中搜索这些实例：

<xml>  
<corpus>  
<body>  
<nonterminals>  
<graph>  
<s>  
<nt id="s9_509" cat="fcl"></nt>  
<nt id="s9_501" cat="pp">  
                <edge label="H" idref="s9_1"/>  
                <edge label="DP" idref="s9_502"/>  
                <edge label="STA" idref="s9_509"/>  
                <edge label="P" idref="s9_19"/>  
                <edge label="S" idref="s9_510"/>  
                <edge label="PU" idref="s9_25"/>  
            </nt>  
</nonterminals>  
</graph>  
</s>  
</body>  
</corpus>  
</xml>

我的代码是：

XPath xpath = XPathFactory.newInstance().newXPath();    
String path = "//xml//corpus//build//s//graph//nonterminals//nt";  
XPathExpression expr = xpath.compile(path);    
System.out.println("Query1: "+path);  
Object result = expr.evaluate(document, XPathConstants.NODESET);    
NodeList nodes = (NodeList) result;    
System.out.println("Number of nodes: "+nodes.getLength());  
for (int i = 0; i < nodes.getLength(); i++) {    
    System.out.println(nodes.item(i).getAttributes().getNamedItem("id").getNodeValue());

这个查询正确吗？存在另一种尝试方式吗？如何删除节点结果？

假设这是 XML 的整个结构，并且<xml>是根节点，我会说您的 XPath 应该是：

xml/corpus/build/s/graph/nonterminals/nt

如果要匹配每个nt节点，而不管它出现在文档中的位置，则可以使用：

/nt

有一些有用的免费工具可以查看 XPath 查询的结果，而无需预先编写 java：

http://xml-copy-editor.sourceforge.net/

http://www.xpathtester.com/

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