XML文件使用SAX方法读取的示例代码

XML文件

<?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>

handler.java类

package xmltes;import javax.xml.stream.events.Characters;import javax.xml.stream.events.StartElement;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;public class handler extends DefaultHandler{    private static int bookNum = 0;    //遍历xml文件的开始标签    @Override    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {        // 调用DefaultHandler父类的startElement方法        super.startElement(uri, localName, qName, attributes);                //判断是不是有属性的标签/如book        if(qName.equals("book")){            bookNum++;            System.out.println("====================开始遍历第"+bookNum+"书的内容================");            //开始解析book元素            //已知book元素下属性的名称，可以根据名称判断           /* String value = attributes.getValue("id");            System.out.println("book的属性值是" + value);*/            //如果不知道数的属性名称            int num = attributes.getLength();                        for(int i=0;i<num;i++){                System.out.println("书的第" + (i+1) + "个属性名是："+attributes.getQName(i)+"===属性值是：" + attributes.getValue(i));            }                    }else if(!qName.equals("book") && !qName.equals("bookstore") ){            System.out.println("节点名是：" + qName);        }                                    }    //遍历xml文件的结束标签    @Override    public void endElement(String uri, String localName, String qName) throws SAXException {        // TODO Auto-generated method stub        super.endElement(uri, localName, qName);        //判断这本书是否遍历结束        if(qName.equals("book")){            System.out.println("====================结束遍历第"+bookNum+"书的内容================");        }    }        @Override    public void characters(char[] ch, int start, int length) throws SAXException {        // TODO Auto-generated method stub        super.characters(ch, start, length);        String value = new String(ch, start, length);        if(!value.trim().equals("")){            System.out.println(value);        }    }        //用来标识解析开始    @Override    public void startDocument() throws SAXException {        // TODO Auto-generated method stub        super.startDocument();//        System.out.println("进入标识解析开始方法");    }        //用来标识解析结束    @Override    public void endDocument() throws SAXException {        // TODO Auto-generated method stub        super.endDocument();//        System.out.println("进入标识解析结束方法");    }    }

Test类

package xmltes;import java.io.IOException;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.SAXException;public class SAXTest {    public static void main(String[] args) {        try {            //获取一个SAXParserFactory的实例            SAXParserFactory factory = SAXParserFactory.newInstance();            //通过factory获取SAXParser实例            SAXParser parser = factory.newSAXParser();            //创建一个SAXParserHandler对象            handler handler = new handler();            parser.parse("001.xml", handler);        } catch (ParserConfigurationException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (SAXException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}

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