java 6.0 拉模式Stax

Stax模式 具体讲解   http://www.blogjava.net/hsith/archive/2006/06/29/55817.html

 

现在主要是针对下面的例子，就是网上的 但是现在学java的是不是不动脑子了 io流的位置都不会设置，老是问为什么不对、、、、、（无语 - _-！） 下面是修改好的，注意啊是1.6啊 呵呵

 

 

 

package test;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;

 

 public class StaxTester {
     public static void main(String[] args) throws XMLStreamException, FileNotFoundException {
         readXMLByStAX();//用XMLEventReader解析xml文档
         writeXMLByStAX();//用XMLStreamWriter写xml文档
     }

     private static void readXMLByStAX() throws XMLStreamException, FileNotFoundException {
         XMLInputFactory xmlif = XMLInputFactory.newInstance();
         XMLEventReader xmler = xmlif.createXMLEventReader(new FileInputStream("D://test.xml"));
         XMLEvent event;
         StringBuffer parsingResult = new StringBuffer();
         while (xmler.hasNext()) {
             event = xmler.nextEvent();           
             if (event.isStartElement()) { //如果解析的是起始标记
                 StartElement se = event.asStartElement();
                 parsingResult.append("<");
                 parsingResult.append(se.getName());
                 if(se.getName().getLocalPart().equals("catalog")) {
                     parsingResult.append(" id=/"");
                     parsingResult.append(se.getAttributeByName(new QName("id")).getValue());
                     parsingResult.append("/"");
                 }
                 parsingResult.append(">");
             } else if (event.isCharacters()) { //如果解析的是文本内容
                 parsingResult.append(event.asCharacters().getData());
             } else if(event.isEndElement()){ //如果解析的是结束标记
                 parsingResult.append("</");
                 parsingResult.append(event.asEndElement().getName());
                 parsingResult.append(">");
             }
         }
         System.out.println(parsingResult);
     }

     private static void writeXMLByStAX() throws XMLStreamException, FileNotFoundException {
         XMLOutputFactory xmlof = XMLOutputFactory.newInstance();
         XMLStreamWriter xmlw = xmlof.createXMLStreamWriter(new FileOutputStream("D://output.xml"));

         // 写入默认的 XML 声明到xml文档
         xmlw.writeStartDocument();
         xmlw.writeCharacters("/n");
         // 写入注释到xml文档
         xmlw.writeComment("testing comment");
         xmlw.writeCharacters("/n");
         // 写入一个catalogs根元素
         xmlw.writeStartElement("catalogs");
         xmlw.writeNamespace("myNS", "http://blog.csdn.net/Chinajash");
         xmlw.writeAttribute("owner","Chinajash");
         xmlw.writeCharacters("/n");
         // 写入子元素catalog
         xmlw.writeStartElement("http://blog.csdn.net/Chinajash", "catalog");
         xmlw.writeAttribute("id","007");
         xmlw.writeCharacters("Apparel");
         // 写入catalog元素的结束标签
         xmlw.writeEndElement();
         // 写入catalogs元素的结束标签
         xmlw.writeEndElement();
         // 结束 XML 文档
         xmlw.writeEndDocument();        
         xmlw.close();
     }
 }