<?xml version="1.0" encoding="UTF-8"?>
<Model>
	<user>
		<id Value="123">1</id>
		<userName>18888222111</userName>
		<passWord>2231231</passWord>
		<propertyes>
			<property Name="name" Value="張三" />
			<property Name="age" Value="28" />
			<property Name="sex" Value="男" />
		</propertyes>
	</user>
	<user>
		<id>2</id>
		<userName>17888222111</userName>
		<passWord>3231231</passWord>
		<propertyes>
			<property Name="name" Value="張三22" />
			<property Name="age" Value="23" />
			<property Name="sex" Value="男" />
		</propertyes>
	</user>
	<user>
		<id>3</id>
		<userName>197888222111</userName>
		<passWord>14231231</passWord>
		<propertyes>
			<property Name="Name" Value="張三33" />
			<property Name="age" Value="21" />
			<property Name="sex" Value="男" />
		</propertyes>
	</user>
</Model>

package com;

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

/**
 * @Author: wangxingcheng
 * @DateTime: 2022/6/25 17:48
 * @Description: 使用dom讀取XML里面數(shù)據(jù)
 */
public class ReadXML {

    public static void main(String[] args) {
        readXML();
    }

    //解析XML數(shù)據(jù)
    public static void readXML(){
        try{
            // 創(chuàng)建解析器工廠
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder db = factory.newDocumentBuilder();
            // 創(chuàng)建一個(gè)Document對(duì)象 設(shè)置XML位置
            Document doc = db.parse("src/com/xml/demo.xml");
            //獲取xml中Model節(jié)點(diǎn)
            NodeList modelList = doc.getElementsByTagName("Model");
            System.out.println("查詢(xún)Model節(jié)點(diǎn)有幾個(gè)========="+modelList.getLength());
            //循環(huán)modelList節(jié)點(diǎn)，獲取modelList里面的其他節(jié)點(diǎn)
            for(int i = 0 ; i < modelList.getLength() ; i++){
                Node model = modelList.item(i);
                System.out.println("model ================"+model);
                //獲取model節(jié)點(diǎn)的子節(jié)點(diǎn)，上圖可以看出model的子節(jié)點(diǎn)是user節(jié)點(diǎn)
                NodeList userNodes = model.getChildNodes();
                for(int j = 0 ; j < userNodes.getLength() ; j++){
                    //獲取到user節(jié)點(diǎn)，循環(huán)取出每個(gè)user節(jié)點(diǎn)
                    Node user = userNodes.item(j);
                    //獲取user節(jié)點(diǎn)的所有子節(jié)點(diǎn)集合里面有id、userName、passWord、propertyes節(jié)點(diǎn)
                    NodeList childNodes = user.getChildNodes();
                    for(int k = 0 ; k < childNodes.getLength() ; k++){
                        // 區(qū)分,去掉空格和換行符
                        if (childNodes.item(k).getNodeType() == Node.ELEMENT_NODE) {
                            //獲取到有屬性的節(jié)點(diǎn)了，打印看下是不是想要的id、userName、passWord、propertyes節(jié)點(diǎn)值和屬性
                            Node node = childNodes.item(k);
                            System.out.print("屬性名=========:" + node.getNodeName());
                            //xml根節(jié)點(diǎn)設(shè)值的位置將會(huì)決定他取值的不同
                            // 1、<id>123</id> 這種取值方式需要使用 .getTextContent() 方法才可以取到值
                            System.out.println("屬性值=========:" + node.getTextContent());
                            // 第二種就是<property Name="Name" Value="張三" />這種寫(xiě)法的取值
                            //屬性名=========:propertyes屬性值=========:剛打印了下這里面每值，原因是這個(gè)節(jié)點(diǎn)本身沒(méi)有值，切包含了其他節(jié)點(diǎn)
                            //這里做一手判斷
                            if(node.getNodeName().equals("propertyes")){//這里再取里面節(jié)點(diǎn)的屬性值，也是第二種取值方式
                                //獲取propertyes里面的屬性
                                NodeList propertyNodeList = node.getChildNodes();
                                for (int g = 0 ; g < propertyNodeList.getLength() ; g++) {
                                    // 區(qū)分,去掉空格和換行符
                                    if (propertyNodeList.item(g).getNodeType() == Node.ELEMENT_NODE) {
                                        Node propertye = propertyNodeList.item(g);
                                        //第二種取值方式來(lái)了，這個(gè)看圖片很明顯他把值都設(shè)置在對(duì)應(yīng)的屬性里面了,獲取當(dāng)前propertye節(jié)點(diǎn)的所有屬性
                                        NamedNodeMap attributes = propertye.getAttributes();
                                        //<property Name="name" Value="張三" /> .getNodeValue()用來(lái)去屬性里面設(shè)置的值
                                        Node name = attributes.item(0);//表示第一個(gè)屬性Name
                                        Node value = attributes.item(1);//表示第二個(gè)屬性Value
                                        System.out.println("property的name值======"+name.getNodeValue());
                                        System.out.println("property的value值======"+value.getNodeValue());
                                    }
                                }
                            }
                        }
                    }

                }
            }

        }catch (Exception e){
            e.printStackTrace();
        }
    }

}