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);
        }
    }
}