Xml解析之PULL解析 例2

 <?xml version="1.0" encoding="UTF-8"?>
 <books>
 <book id="1001">
   <name>红楼梦</name>
   <author>曹雪芹</author>
   <price>345.6</price>
 </book>
 <book id="1002">
   <name>西游记</name>
   <author>吴承恩</author>
   <price>102.8</price>
 </book>
 <book id="1003">
   <name>三国演义</name>
   <author>罗贯中</author>
   <price>200.6</price>
 </book>
 <book id="1004">
   <name>水浒传</name>
   <author>施耐庵</author>
   <price>108.6</price>
 </book>
 </books>

例2.
1、用了Map<String, Object> book表示一个book对象
2、用了List<Map<String,Object>> list存放一组book对象

 package com.qf.pull;

 import java.io.FileInputStream;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlPullParserFactory;

 public class Demo4_book {

     public static void main(String[] args) throws XmlPullParserException,
             IOException {
         // TODO Auto-generated method stub
         XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
         XmlPullParser parser = factory.newPullParser();
         parser.setInput(new FileInputStream("src/book.xml"), "utf-8");
         int type = parser.getEventType();
         Map<String, Object> book = null;
         List<Map<String, Object>> list = null;
         while (type != XmlPullParser.END_DOCUMENT) {
             String tagName = parser.getName();
             switch (type) {
             //不同于例1，也可以在文档开始的时候，实例化list对象，用于存放XML解析后的数据
             case XmlPullParser.START_DOCUMENT:
                 list = new ArrayList<Map<String, Object>>();
                 // System.out.println(tagName);//null
                 break;
             case XmlPullParser.START_TAG:
                 // System.out.println(tagName);
                 if ("book".equals(tagName)) {
                     book = new HashMap<String, Object>();
                     int count = parser.getAttributeCount();//假设有多个属性值
                     for (int i = 0; i < count; i++) {
                         String name = parser.getAttributeName(i);//比如"id"
                         String value = parser.getAttributeValue(i);//比如"1004"
                         book.put(name, value);
                     }
                 } else if ("name".equals(tagName)) {
                     book.put("name", parser.nextText());
                 } else if ("author".equals(tagName)) {
                     book.put("author", parser.nextText());
                 } else if ("price".equals(tagName)) {
                     book.put("price", Double.parseDouble(parser.nextText()));
                 }
                 break;
             case XmlPullParser.END_TAG:
                 if ("book".equals(tagName)) {
                     list.add(book);
                 }
                 break;
             }

             type = parser.next();
         }// end while
         for (Map<String, Object> map : list) {
             System.out.println(map);
         }
     }
 }