java使用SAX解析XML

源代码文件：

package com.qydev.mifeng.sax;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.List;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;public class XMLParser {    public static void main(String[] args) throws SAXException, IOException{//      System.out.println(System.getProperty("user.dir"));//      File f = new File(".");//      String absolutePath = f.getAbsolutePath();//      System.out.println(absolutePath);//      //this.getClass().//      //      File f1 = null;//      try{//           f1 = new File("mm/a.text");//           if(!f1.getParentFile().exists())//                  f1.getParentFile().mkdirs();//              //f1.getParent().m//           f1.getParentFile().mkdirs();//           if(!f1.getParentFile().exists())//                  //f1.getParentFile().mkdirs();//                  f1.createNewFile();//      //      }catch(FileNotFoundException e){//          System.out.println("exception isisi");//          f1.getParentFile().mkdirs();//      }//      FileOutputStream fos = new FileOutputStream(f1);//      fos.write("welcome to shanghai".getBytes());//      f1.createNewFile();        SAXParserFactory factory = SAXParserFactory.newInstance();        SAXParser parser = null;        try {             parser = factory.newSAXParser();        } catch (ParserConfigurationException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (SAXException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        XmlContentParser xmlContentParser = new XmlContentParser();        //parser.parse(new File("book.xml"), xmlContentParser);        //parser.parse(new File(XMLParser.class.getResource("/com/qydev/mifeng/sax/book.xml").getPath()), xmlContentParser);        parser.parse(new File("src/com/qydev/mifeng/sax/book.xml"), xmlContentParser);        List<Book> bookList = xmlContentParser.getBookList();        for(Book book:bookList){            System.out.println(book);        }    }    public static class XmlContentParser extends DefaultHandler{        private Book book;        private List<Book> books = new ArrayList<Book>();        private String preTag;        @Override        public void startDocument() throws SAXException {            super.startDocument();            System.out.println("start the document: ");        }        @Override        public void endDocument() throws SAXException {            super.endDocument();            System.out.println("end the document: ");            System.out.println("XML文件解析结束...");              System.out.println("结果:" + books);          }        @Override        public void startElement(String uri, String localName, String qName, Attributes attributes)                throws SAXException {            super.startElement(uri, localName, qName, attributes);            if(qName.equals("book") && book == null){                book = new Book();            }            preTag = qName;        }        @Override        public void endElement(String uri, String localName, String qName) throws SAXException {            super.endElement(uri, localName, qName);            if("book".equals(qName) && book!=null){                books.add(book);                book = null;            }        }        @Override        public void characters(char[] ch, int start, int length) throws SAXException {            super.characters(ch, start, length);             System.out.println("characters-----------");                // System.out.println("    ch: " + Arrays.toString(ch) );                System.out.println("    ch: " + ch);                System.out.println("    start: " + start);                System.out.println("    length: " + length);                if(book != null && preTag != null && !"book".equals(preTag) && !"shelf".equals(preTag) ){                    String data = new String(ch, start, length);                    if(!"".equals(data.trim())){                        if("name".equals(preTag)){                            book.setBookName(data);                        }                        else if("author".equals(preTag)){                            book.setAutor(data);                        }                        else if("price".equals(preTag)){                            book.setPrice(Integer.valueOf(data));                        }                    }                }        }        public List<Book> getBookList(){            return books;        }    }    public static class Book{        private String bookName;        private String autor;        private int price;        public String getBookName() {            return bookName;        }        public void setBookName(String bookName) {            this.bookName = bookName;            //this.getClass().getResource(name)        }        public String getAutor() {            return autor;        }        public void setAutor(String autor) {            this.autor = autor;        }        public int getPrice() {            return price;        }        public void setPrice(int price) {            this.price = price;        }        public String toString(){            return "book name: "+ getBookName()+", book author: "+getAutor()+", book price: "+getPrice();        }    }}

XML文件：

<?xml version="1.0" encoding="utf-8"?><!DOCTYPE 书架 SYSTEM "book.dtd"><!-- <书架>    <书>        <书名>xxx</书名>         <作者>jjf</作者>         <售价>23</售价>    </书>    <书>        <书名>yyy</书名>        <作者>蜜蜂</作者>        <售价>12</售价>    </书></书架> --><shelf>    <book>        <name>xxx</name>         <author>jjf</author>        <price>23</price>    </book>    <book>        <name>yyy</name>        <author>蜜蜂</author>        <price>12</price>    </book></shelf>

References:
1. http://blog.sina.com.cn/s/blog_8a86f4dd0101edv1.html
2. https://yq.aliyun.com/ziliao/37597
3. http://lavasoft.blog.51cto.com/62575/265821/
4. http://blog.sina.com.cn/s/blog_9386f17b0100w2vv.html
5. http://blog.csdn.net/chindroid/article/details/7735832/