Java中SAX方式解析XML

books.xml

<?xml version="1.0" encoding="UTF-8"?><bookstore><book id="1"><name>冰与火之歌</name><author>乔治马丁</author><year>2014</year><price>89</price></book><book id="2"><name>安徒生童话</name><year>2004</year><price>77</price><language>English</language></book></bookstore>

Book.java

public class Book {private String id;private String name;private String author;private String year;private String price;private String language;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAuthor() {return author;}public void setAuthor(String author) {this.author = author;}public String getYear() {return year;}public void setYear(String year) {this.year = year;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}public String getLanguage() {return language;}public void setLanguage(String language) {this.language = language;}}

SAXParserHandler.java

import java.util.ArrayList;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;public class SAXParserHandler extends DefaultHandler {String value = null;Book book = null;private ArrayList<Book> bookList = new ArrayList<Book>();public ArrayList<Book> getBookList() {return bookList;}int bookIndex = 0;/** * 用来标识解析开始 */@Overridepublic void startDocument() throws SAXException {// TODO Auto-generated method stubsuper.startDocument();System.out.println("SAX解析开始");}/** * 用来标识解析结束 */@Overridepublic void endDocument() throws SAXException {// TODO Auto-generated method stubsuper.endDocument();System.out.println("SAX解析结束");}/** * 解析xml元素 */@Overridepublic void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException {//调用DefaultHandler类的startElement方法super.startElement(uri, localName, qName, attributes);if (qName.equals("book")) {bookIndex++;//创建一个book对象book = new Book();//开始解析book元素的属性System.out.println("======================开始遍历某一本书的内容=================");//已知book元素下属性的名称，根据属性名称获取属性值//String value = attributes.getValue("id");//System.out.println("book的属性值是：" + value);//不知道book元素下属性的名称以及个数，如何获取属性名以及属性值int num = attributes.getLength();for(int i = 0; i < num; i++){System.out.print("book元素的第" + (i + 1) +  "个属性名是："+ attributes.getQName(i));System.out.println("---属性值是：" + attributes.getValue(i));if (attributes.getQName(i).equals("id")) {book.setId(attributes.getValue(i));}}}else if (!qName.equals("name") && !qName.equals("bookstore")) {System.out.print("节点名是：" + qName + "---");}}@Overridepublic void endElement(String uri, String localName, String qName)throws SAXException {//调用DefaultHandler类的endElement方法super.endElement(uri, localName, qName);//判断是否针对一本书已经遍历结束if (qName.equals("book")) {bookList.add(book);book = null;System.out.println("======================结束遍历某一本书的内容=================");}else if (qName.equals("name")) {book.setName(value);}else if (qName.equals("author")) {book.setAuthor(value);}else if (qName.equals("year")) {book.setYear(value);}else if (qName.equals("price")) {book.setPrice(value);}else if (qName.equals("language")) {book.setLanguage(value);}}@Overridepublic void characters(char[] ch, int start, int length)throws SAXException {// TODO Auto-generated method stubsuper.characters(ch, start, length);value = new String(ch, start, length);if (!value.trim().equals("")) {System.out.println("节点值是：" + value);}}}

SAXTest.java

import java.io.IOException;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.SAXException;import org.xml.sax.SAXParseException;public class SAXTest {/** * @param args */public static void main(String[] args) {//获取一个SAXParserFactory的实例SAXParserFactory factory = SAXParserFactory.newInstance();//通过factory获取SAXParser实例try {SAXParser parser = factory.newSAXParser();//创建SAXParserHandler对象SAXParserHandler handler = new SAXParserHandler();parser.parse("books.xml", handler);System.out.println("~！~！~！共有" + handler.getBookList().size()+ "本书");for (Book book : handler.getBookList()) {System.out.println(book.getId());System.out.println(book.getName());System.out.println(book.getAuthor());System.out.println(book.getYear());System.out.println(book.getPrice());System.out.println(book.getLanguage());System.out.println("----finish----");}} catch (ParserConfigurationException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (SAXException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

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