在XML文件中搜索元素值
在给定的XML文件中，我试图在Java中使用XPath搜索字符串的存在。 然而，即使字符串在那里，我的输出也总是作为号码。希望有人可以指出我可能做错了什么？
XML文件：
intro1
introd1 introd2 1 task objectives
object1 object2 1 task objectives
object1 This is the Perfect Word I am looking for
在Java中，我试图检查"perfect"这个词的存在，如下所示：
expr = xpath.compile("//article//body//section//region[contains(.,'perfect')]"); object result = expr.evaluate(doc,XPathConstants.NODESET); NodeList nodes = (NodeList)result; if (nodes.getLength() > 0) { System.out.println("Found"); // do other stuff here } else { System.out.println("Not found"); }
当我运行它时，输出始终是"Not Found" 。 知道我做错了什么吗？
我测试了这个……
expr =xpath.compile("/article/body/section/region[contains(translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'perfect')]");
反对
intro1
perfect Perfect 1 task objectives
pErFeCt Not Perfect 1 task objectives
object1 This is the Perfect Word I am looking for
使用…
import java.io.File; import java.util.logging.Level; import java.util.logging.Logger; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpression; import javax.xml.xpath.XPathFactory; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class TestXML05 { public static void main(String[] args) { try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); Document doc = factory.newDocumentBuilder().parse(new File("Sample.xml")); XPathFactory xFactory = XPathFactory.newInstance(); XPath xPath = xFactory.newXPath(); XPathExpression exp = xPath.compile("/article/body/section/region[contains(translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'perfect')]"); NodeList nl = (NodeList)exp.evaluate(doc.getFirstChild(), XPathConstants.NODESET); for (int index = 0; index < nl.getLength(); index++) { Node node = nl.item(index); System.out.println(node.getTextContent()); } } catch (Exception ex) { Logger.getLogger(TestXML05.class.getName()).log(Level.SEVERE, null, ex); } } }
哪个输出......
perfect Perfect pErFeCt Not Perfect This is the Perfect Word I am looking for
XML / XPath区分大小写，您的XPath应该是
//article//body//section//region[contains(., 'Perfect')]
要使不区分大小写，请使用此选项
//article//body//section//region[ contains(translate(., 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'), 'perfect') ]