package org.itat.stax; import java.io.IOException; import java.io.InputStream; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.stream.EventFilter; import javax.xml.stream.FactoryConfigurationError; import javax.xml.stream.XMLEventReader; import javax.xml.stream.XMLInputFactory; import javax.xml.stream.XMLOutputFactory; import javax.xml.stream.XMLStreamConstants; import javax.xml.stream.XMLStreamException; import javax.xml.stream.XMLStreamReader; import javax.xml.stream.XMLStreamWriter; import javax.xml.stream.events.XMLEvent; import javax.xml.transform.OutputKeys; import javax.xml.transform.Result; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerConfigurationException; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.TransformerFactoryConfigurationError; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory; import org.junit.Test; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; public class TestStax { @Test public void test01() { XMLInputFactory factory = XMLInputFactory.newInstance(); InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); XMLStreamReader reader = factory.createXMLStreamReader(is); while(reader.hasNext()) { int type = reader.next(); //鍒ゆ柇鑺傜偣绫诲瀷鏄惁鏄紑濮嬫垨鑰呯粨鏉熸垨鑰呮枃鏈妭鐐�涔嬪悗鏍规嵁鎯呭喌鍙婅繘琛屽鐞� if(type==XMLStreamConstants.START_ELEMENT) { System.out.println(reader.getName()); } else if(type==XMLStreamConstants.CHARACTERS) { System.out.println(reader.getText().trim()); } else if(type==XMLStreamConstants.END_ELEMENT) { System.out.println("/"+reader.getName()); } } } catch (XMLStreamException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } @Test public void test02() { XMLInputFactory factory = XMLInputFactory.newInstance(); InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); XMLStreamReader reader = factory.createXMLStreamReader(is); while(reader.hasNext()) { int type = reader.next(); if(type==XMLStreamConstants.START_ELEMENT) { String name = reader.getName().toString(); if(name.equals("book")) { System.out.println(reader.getAttributeName(0)+":"+reader.getAttributeValue(0)); } } } } catch (XMLStreamException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } @Test public void test03() { XMLInputFactory factory = XMLInputFactory.newInstance(); InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); XMLStreamReader reader = factory.createXMLStreamReader(is); while(reader.hasNext()) { int type = reader.next(); if(type==XMLStreamConstants.START_ELEMENT) { String name = reader.getName().toString(); if(name.equals("title")) { System.out.print(reader.getElementText()+":"); } if(name.equals("price")) { System.out.print(reader.getElementText()+"\n"); } } } } catch (XMLStreamException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } @Test public void test04() { XMLInputFactory factory = XMLInputFactory.newInstance(); InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); //鍩轰簬杩唬妯″瀷鐨勬搷浣滄柟寮� XMLEventReader reader = factory.createXMLEventReader(is); int num = 0; while(reader.hasNext()) { //閫氳繃XMLEvent鏉ヨ幏鍙栨槸鍚︽槸鏌愮鑺傜偣绫诲瀷 XMLEvent event = reader.nextEvent(); if(event.isStartElement()) { //閫氳繃event.asxxx杞崲鑺傜偣 String name = event.asStartElement().getName().toString(); if(name.equals("title")) { System.out.print(reader.getElementText()+":"); } if(name.equals("price")) { System.out.print(reader.getElementText()+"\n"); } } num++; } System.out.println(num); } catch (XMLStreamException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } @Test public void test05() { XMLInputFactory factory = XMLInputFactory.newInstance(); InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); //鍩轰簬Filter鐨勮繃婊ゆ柟寮忥紝鍙互鏈夋晥鐨勮繃婊ゆ帀涓嶇敤杩涜鎿嶄綔鐨勮妭鐐癸紝鏁堢巼浼氶珮涓�簺 XMLEventReader reader = factory.createFilteredReader(factory.createXMLEventReader(is), new EventFilter() { @Override public boolean accept(XMLEvent event) { //杩斿洖true琛ㄧず浼氭樉绀猴紝杩斿洖false琛ㄧず涓嶆樉绀� if(event.isStartElement()) { String name = event.asStartElement().getName().toString(); if(name.equals("title")||name.equals("price")) return true; } return false; } }); int num = 0; while(reader.hasNext()) { //閫氳繃XMLEvent鏉ヨ幏鍙栨槸鍚︽槸鏌愮鑺傜偣绫诲瀷 XMLEvent event = reader.nextEvent(); if(event.isStartElement()) { //閫氳繃event.asxxx杞崲鑺傜偣 String name = event.asStartElement().getName().toString(); if(name.equals("title")) { System.out.print(reader.getElementText()+":"); } if(name.equals("price")) { System.out.print(reader.getElementText()+"\n"); } } num++; } System.out.println(num); } catch (XMLStreamException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } @Test public void test06() { InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); //鍒涘缓鏂囨。澶勭悊瀵硅薄 DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder(); //閫氳繃DocumentBuilder鍒涘缓doc鐨勬枃妗e璞� Document doc = db.parse(is); //鍒涘缓XPath XPath xpath = XPathFactory.newInstance().newXPath(); //绗竴涓弬鏁板氨鏄痻path,绗簩鍙傛暟灏辨槸鏂囨。 NodeList list = (NodeList)xpath.evaluate("//book[@category='WEB']", doc,XPathConstants.NODESET); for(int i=0;i<list.getLength();i++) { //閬嶅巻杈撳嚭鐩稿簲鐨勭粨鏋� Element e = (Element)list.item(i); System.out.println(e.getElementsByTagName("title").item(0).getTextContent()); } } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (XPathExpressionException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } @Test public void test07() { try { XMLStreamWriter xsw = XMLOutputFactory.newInstance().createXMLStreamWriter(System.out); xsw.writeStartDocument("UTF-8","1.0"); xsw.writeEndDocument(); String ns = "http://11:dd"; xsw.writeStartElement("nsadfsadf","person",ns); xsw.writeStartElement(ns,"id"); xsw.writeCharacters("1"); xsw.writeEndElement(); xsw.writeEndElement(); xsw.flush(); xsw.close(); } catch (XMLStreamException e) { e.printStackTrace(); } catch (FactoryConfigurationError e) { e.printStackTrace(); } } @Test public void test08() { InputStream is = null; try { is = TestStax.class.getClassLoader().getResourceAsStream("books.xml"); //鍒涘缓鏂囨。澶勭悊瀵硅薄 DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder(); //閫氳繃DocumentBuilder鍒涘缓doc鐨勬枃妗e璞� Document doc = db.parse(is); //鍒涘缓XPath XPath xpath = XPathFactory.newInstance().newXPath(); Transformer tran = TransformerFactory.newInstance().newTransformer(); tran.setOutputProperty(OutputKeys.ENCODING,"UTF-8"); tran.setOutputProperty(OutputKeys.INDENT, "yes"); //绗竴涓弬鏁板氨鏄痻path,绗簩鍙傛暟灏辨槸鏂囨。 NodeList list = (NodeList)xpath.evaluate("//book[title='Learning XML']", doc,XPathConstants.NODESET); //鑾峰彇price鑺傜偣 Element be = (Element)list.item(0); Element e = (Element)(be.getElementsByTagName("price").item(0)); e.setTextContent("333.9"); Result result = new StreamResult(System.out); //閫氳繃tranformer淇敼鑺傜偣 tran.transform(new DOMSource(doc), result); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (XPathExpressionException e) { e.printStackTrace(); } catch (TransformerConfigurationException e) { e.printStackTrace(); } catch (TransformerFactoryConfigurationError e) { e.printStackTrace(); } catch (TransformerException e) { e.printStackTrace(); } finally { try { if(is!=null) is.close(); } catch (IOException e) { e.printStackTrace(); } } } }
book.xml
<?xml version="1.0" encoding="UTF-8"?> <bookstore> <book category="COOKING"> <title lang="en">Everyday Italian</title> <author>Giada De Laurentiis</author> <year>2005</year> <price>30.00</price> </book> <book category="CHILDREN"> <title lang="en">Harry Potter</title> <author>J K. Rowling</author> <year>2005</year> <price>29.99</price> </book> <book category="WEB"> <title lang="en">XQuery Kick Start</title> <author>James McGovern</author> <author>Per Bothner</author> <author>Kurt Cagle</author> <author>James Linn</author> <author>Vaidyanathan Nagarajan</author> <year>2003</year> <price>49.99</price> </book> <book category="WEB"> <title lang="en">Learning XML</title> <author>Erik T. Ray</author> <year>2003</year> <price>39.95</price> </book> </bookstore>