java--XML解析之根据id查找元素

来源：互联网发布：淘宝助理无法显示图片编辑：程序博客网时间：2024/05/29 05:00

备注：使用java原生dom解析

1.java代码

package JDBC;import java.io.File;import java.io.IOException;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import org.w3c.dom.Document;import org.xml.sax.SAXException;public class Test {    public static void main(String[] args) throws ParserConfigurationException,            SAXException, IOException {        String xmlPath = "D:" + File.separator + "XML.xml";// 得到XML文件地址        File file = new File(xmlPath);// 得到xml文件        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();// 得到工厂        DocumentBuilder docb = factory.newDocumentBuilder();// 得到DOC建造者        Document doc = docb.parse(file);// 将文件转换成文档        /*         * 根据Id得到对应的元素中的内容，使用getElementById必须有加载对应的dtd文件         */        System.out.println(doc.getElementById("1").getTextContent());   //      // 得到xml的编码集//      System.out.println(doc.getXmlEncoding());//      // 得到版本号//      System.out.println(doc.getXmlVersion());////      // 得到第一个节点的名字//      System.out.println(doc.getFirstChild().getNodeName());    }}

2.XML文件

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE note [<!ELEMENT note (select,insert,update,delete)><!ELEMENT insert      (#PCDATA)><!ATTLIST insert id ID "0"><!ELEMENT select    (#PCDATA)><!ATTLIST select id ID "0" ><!ELEMENT update (#PCDATA)><!ATTLIST update id ID "0"><!ELEMENT delect    (#PCDATA)><!ATTLIST delect id ID "0">]><note><select  id="1">slect * from table order by desc1</select><insert  id="2">slect * from table order by desc2</insert><update  id="3">slect * from table order by desc3</update><delete id="4">slect * from table order by desc4</delete></note>

0 0