Below I will bring you a simple example of using XPath in dom4j. Let me share it with you now and give it as a reference for everyone.
looks like this:
package com.wzh.test.xpath; import java.io.File; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Node; import org.dom4j.io.SAXReader; public class Demo4 { public static void main(String[] args) throws DocumentException { SAXReader reader=new SAXReader(); Document document=reader.read(new File("src/book.xml")); String value=document.selectSingleNode("//书名").getText(); System.out.println(value); //检测xml文档是否有匹配的用户名和密码 String username="aaa"; String password="123"; reader=new SAXReader(); document=reader.read(new File("src/users.xml")); Node node=document.selectSingleNode("//user[@username='"+username+"'" + " and @password='"+password+"']"); if(node==null) { System.out.println("用户名密码错误"); } else { System.out.println("登录成功"); } } }
book.xml
<书架> <书> <书名>Java就业培训教材 <作者>张孝祥 <售价>39.00元 <书> <书名>Java网页开发 <作者>张孝祥 <售价>29.00元
users. xml
The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
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