Java 解析XML的几种方式：DOM、SAX、JDOM和DOM4J。

　　归纳总结Java解析XML主要有四中方式，分别是DOM、SAX、JDOM和DOM4J。其中DOM和SAX是官方包自带，另外两个JDOM和DOM4J是第三方包。

一、此篇测试代码用到的XML情况。

1、XML内容展示

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <class>
 3     <people>
 4         <name>Jack</name>
 5         <age>19</age>
 6         <sex>male</sex>
 7         <job>student</job>
 8     </people>
 9     <people>
10         <name>Merry</name>
11         <age>26</age>
12         <sex>female</sex>
13         <job>teacher</job>
14     </people>
15 </class>

2、所在项目位置

二、几种方式

1、DOM方式代码及运行结果，已省略类名及main函数代码。

 1 import org.w3c.dom.Document;
 2 import org.w3c.dom.Element;
 3 import org.w3c.dom.Node;
 4 import org.w3c.dom.NodeList;
 5 import org.xml.sax.SAXException;
 6 import javax.xml.parsers.DocumentBuilder;
 7 import javax.xml.parsers.DocumentBuilderFactory;
 8 import javax.xml.parsers.ParserConfigurationException;
 9 import java.io.File;
10 import java.io.IOException;
11 /**
12  * Create by 让子弹飞 on 2020/4/5
13  */
14         try {
15             DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
16             DocumentBuilder builder = factory.newDocumentBuilder();
17             String path = HelloWorld.class.getClassLoader().getResource("config/peoples.xml").getPath();
18             File file = new File(path);
19             Document document = builder.parse(file);
20             // 获取节点People集合
21             NodeList nodeList = document.getElementsByTagName("people");
22             for (int i = 0; i < nodeList.getLength(); i++) {
23 //                Element element=(Element) nodeList.item(i);
24 //                NodeList childNodes=element.getChildNodes();
25                 Node node = nodeList.item(i);
26                 NodeList childNodes = node.getChildNodes();
27                 for (int j = 0; j < childNodes.getLength(); j++) {
28                     Node childNode = childNodes.item(j);
29                     if (childNode.getNodeType() == Node.ELEMENT_NODE) {
30                         // 获取节点名称
31                         // 获取对应节点包含的值
32                         System.out.println(childNode.getNodeName() + ":" + childNode.getFirstChild().getNodeValue());
33                     }
34                 }
35                 System.out.println("************************");
36             }
37         } catch (ParserConfigurationException ex) {
38             //ex.printStackTrace();
39             System.out.println("Error : " + ex.toString());
40         } catch (IOException ex) {
41             //ex.printStackTrace();
42             System.out.println("Error : " + ex.toString());
43         } catch (SAXException ex) {
44             //ex.printStackTrace();
45             System.out.println("Error : " + ex.toString());
46         }