使用javax.xml解析xml
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
book.xml
Everyday Italian Giada De Laurentiis 2005 30.00 Harry Potter J K. Rowling 2005 29.99 XQuery Kick Start James McGovern Per Bothner Kurt Cagle James Linn Vaidyanathan Nagarajan 2003 49.99 Learning XML Erik T. Ray 2003 39.95