第一种：DOM解析xml
、核心类：
DocumentBuilderFactory
DocumentBuilder
Doucment
Element
NodeList
Node

2、核心代码：

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   // 使用工厂来实例化一个构造Document的对象
                        DocumentBuilder builder = factory.newDocumentBuilder();
　// 利用DocumentBuilder来构造一个Document对象
   Document document = builder.parse(filename);
  // 获取Document文档的根节点对象
   Element root = document.getDocumentElement();
  // 通过根节点，获取到根节点下面的所有二级子节点
   NodeList nodeList = root.getChildNodes();

    // 遍历子节点，获取内部的每一个节点
   for (int i = @H_403_27@0; i < nodeList.getLength(); i++) {
    Node node = nodeList.item(i);
               // 获取每个末端阶段的文本值和节点名称，将其存入到Map对象中
               map.put(item.getNodeName(),item.getTextContent());
     list.add(map);
   }

第二种：DOM解析xml
1、核心类：
XmlPullParserFactory
XmlPullParser
2、核心代码：

@H_403_27@1 // 实例化一个xml pull解析的工厂
 @H_403_27@2 XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
 @H_403_27@3 // 实例化一个xml pull解析对象
 @H_403_27@4 XmlPullParser pullParser = factory.newPullParser();
 @H_403_27@5 // 将xml文件作为流传入到inputstream
 @H_403_27@6 BufferedInputStream bis = new BufferedInputStream(
 @H_403_27@7 new FileInputStream("customers.xml"));
 @H_403_27@8  
 @H_403_27@9 // xml解析对象接收输入流对象
@H_403_27@10 pullParser.setInput(bis,"utf-8");
@H_403_27@11  
@H_403_27@12 int event = pullParser.getEventType();
@H_403_27@13 List<Map<String,Object>> list = null;
@H_403_27@14 Map<String,Object> map = null;
@H_403_27@15  
@H_403_27@16 while (event != XmlPullParser.END_DOCUMENT) {
@H_403_27@17 switch (event) {
@H_403_27@18 case XmlPullParser.START_DOCUMENT:
@H_403_27@19 list = new ArrayList<>();
@H_403_27@20 break;
@H_403_27@21 case XmlPullParser.START_TAG:
@H_403_27@22 if ("customer".equals(pullParser.getName())) {
@H_403_27@23 map = new HashMap<String,Object>();
@H_403_27@24 }
@H_403_27@25 if (pullParser.getName().equals("name")) {
@H_403_27@26 map.put("name",pullParser.nextText());
@H_403_27@27 }
@H_403_27@28 if (pullParser.getName().equals("tel")) {
@H_403_27@29 map.put("tel",pullParser.nextText());
@H_403_27@30 }
@H_403_27@31 // if (pullParser.getName().equals("email")) {
@H_403_27@32 // map.put("email",pullParser.nextText());
@H_403_27@33 // }
@H_403_27@34 break;
@H_403_27@35 case XmlPullParser.END_TAG:
@H_403_27@36 if (pullParser.getName().equals("customer")) {
@H_403_27@37 list.add(map);
@H_403_27@38 }
@H_403_27@39 break;
@H_403_27@40 }
@H_403_27@41 event = pullParser.next();
@H_403_27@42 }