Java Stax解析XML示例

Java Stax解析XML示例

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();

//判断节点类型是否是开始或者结束或者文本节点,之后根据情况及进行处理

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");

//基于迭代模型的操作方式

XMLEventReader reader = factory.createXMLEventReader(is);

int num = 0;

while(reader.hasNext()) {

//通过XMLEvent来获取是否是某种节点类型

XMLEvent event = reader.nextEvent();

if(event.isStartElement()) {

//通过event.asxxx转换节点

String name = event.asStartElement().getName().toString();

if(name.equals("title")) {

System.out.print(reader.getElementText()+":");

}

if(name.equals("price")) {

System.out.print(reader.getElhttp://ementText()+"\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");

//基于Filter的过滤方式，可以有效的过滤掉不用进行操作的节点，效率会高一些

XMLEventReader reader = factory.createFilteredReader(factory.createXMLEventReader(is),

new EventFilter() {

@Override

public boolean accept(XMLEvent event) {

//返回true表示会显示，返回false表示不显示

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()) {

//通过XMLEvent来获取是否是某种节点类型

XMLEvent event = reader.nextEvent();

if(event.isStartElement()) {

//通过event.asxxx转换节点

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");

//创建文档处理对象

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();

//通过DocumentBuilder创建doc的文档对象

Document doc = db.parse(is);

//创建XPath

XPath xpath = XPathFactory.newInstance().newXPath();

//第一个参数就是xpath,第二参数就是文档

NodeList list = (NodeList)xpath.evaluate("//book[@category='WEB']", doc,XPathConstants.NODESET);

for(int i=0;i

//遍历输出相应的结果

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");

//创建文档处理对象

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();

//通过DocumentBuilder创建doc的文档对象

Document doc = db.parse(is);

//创建XPath

XPath xpath = XPathFactory.newInstance().newXPath();

Transformer tran = TransformerFactory.newInstance().newTransformer();

tran.setOutputProperty(OutputKeys.ENCODING,"UTF-8");

tran.setOutputProperty(OutputKeys.INDENT, "yes");

//第一个参数就是xpath,第二参数就是文档

NodeList list = (NodeList)xpath.evaluate("//book[title='Learning XML']", doc,XPathConstants.NODESET);

//获取price节点

Element be = (Element)list.item(0);

Element e = (Element)(be.getElementsByTagName("price").item(0));

e.setTextContent("333.9");

Result result = new StreamResult(System.out);

//通过tranformer修改节点

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();

}

}

}

}

//遍历输出相应的结果

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");

//创建文档处理对象

DocumentBuilder db = DocumentBuilderFactory.newInstance().newDocumentBuilder();

//通过DocumentBuilder创建doc的文档对象

Document doc = db.parse(is);

//创建XPath

XPath xpath = XPathFactory.newInstance().newXPath();

Transformer tran = TransformerFactory.newInstance().newTransformer();

tran.setOutputProperty(OutputKeys.ENCODING,"UTF-8");

tran.setOutputProperty(OutputKeys.INDENT, "yes");

//第一个参数就是xpath,第二参数就是文档

NodeList list = (NodeList)xpath.evaluate("//book[title='Learning XML']", doc,XPathConstants.NODESET);

//获取price节点

Element be = (Element)list.item(0);

Element e = (Element)(be.getElementsByTagName("price").item(0));

e.setTextContent("333.9");

Result result = new StreamResult(System.out);

//通过tranformer修改节点

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();

}

}

}

}

Giada De Laurentiis

2005

30.00

J K. Rowling

2005

29.99

James McGovern

Per Bothner

Kurt Cagle

James Linn

Vaidyanathan Nagarajan

2003

49.99

Erik T. Ray

2003

39.95

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