文章目录
官方dom4举例
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In dom4j XPath expressions can be evaluated on the Document or on any Node in the tree (such as Attribute, Element or ProcessingInstruction). This allows complex navigation throughout the document with a single line of code. For example. public void bar(Document document) {
List list = document.selectNodes( "//foo/bar" );
Node node = document.selectSingleNode( "//foo/bar/author" );
String name = node.valueOf( "@name" );
}
For example if you wish to find all the hypertext links in an XHTML document the following code would do the trick. public void findLinks(Document document) throws DocumentException {
List list = document.selectNodes( "//a/@href" );
for (Iterator iter = list.iterator(); iter.hasNext(); ) {
Attribute attribute = (Attribute) iter.next();
String url = attribute.getValue();
}
}
If you need any help learning the XPath language we highly recommend the Zvon |
需要的XPath表达式的话 去查文档 相对简单 有中文
举例
SAXReader reader=new SAXReader();
Document document=reader.read(new File("src/book.xml"));
String value=document.selectSingleNode("//作者").getText();//第一个值
System.out.println(value);
Document document=reader.read(new File("src/book.xml"));
String value=document.selectSingleNode("//作者").getText();//第一个值
System.out.println(value);
需要dom4j里面的额外jar包
注意上述代码是错误的 XPath 表达式 是用的单引号