JAVA dom4j 解析xml

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.List;


import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.xml.sax.InputSource;


@SuppressWarnings({ "unchecked", "rawtypes" })
public class XMLHandler {


public static String createXML() {
String strXML = null;
Document document = DocumentHelper.createDocument();
Element root = document.addElement("root");
Element phone = root.addElement("TelePhone");
Element nokia = phone.addElement("type");
nokia.addAttribute("name", "nokia");
Element price_nokia = nokia.addElement("price");
price_nokia.addText("599");
Element operator_nokia = nokia.addElement("operator");
operator_nokia.addText("CMCC");
Element xiaomi = phone.addElement("type");
xiaomi.addAttribute("name", "xiaomi");
Element price_xiaomi = xiaomi.addElement("price");
price_xiaomi.addText("699");
Element operator_xiaomi = xiaomi.addElement("operator");
operator_xiaomi.addText("ChinaNet");


StringWriter strWtr = new StringWriter();
OutputFormat format = OutputFormat.createPrettyPrint();
format.setEncoding("UTF-8");
XMLWriter xmlWriter = new XMLWriter(strWtr, format);
try {
xmlWriter.write(document);
} catch (IOException e1) {
e1.printStackTrace();
}
strXML = strWtr.toString();


File file = new File("TelePhone.xml");
if (file.exists()) {
file.delete();
}
try {
file.createNewFile();
XMLWriter out = new XMLWriter(new FileWriter(file));
out.write(document);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}


return strXML;
}


public static void parserXML(String strXML) {
SAXReader reader = new SAXReader();
StringReader sr = new StringReader(strXML);
InputSource is = new InputSource(sr);
try {
Document document = reader.read(is);
Element root = document.getRootElement();
List<Element> phoneList = root.elements("TelePhone");
List<Element> typeList = phoneList.get(0).elements("type");
for (int i = 0; i < typeList.size(); i++) {
Element element = typeList.get(i);
String phoneName = element.attributeValue("name");
System.out.println("phonename = " + phoneName);
List<Element> childList = element.elements();
for (int j = 0; j < childList.size(); j++) {
Element e = childList.get(j);
System.out.println(e.getName() + "=" + e.getText());
}
}
} catch (DocumentException e) {
e.printStackTrace();
}
}


public static void parserXMLbyXPath(String strXML) {
SAXReader reader = new SAXReader();
StringReader sr = new StringReader(strXML);
InputSource is = new InputSource(sr);
try {
Document document = reader.read(is);
List list = document.selectNodes("/root/TelePhone/type");
for (int i = 0; i < list.size(); i++) {
Element e = (Element) list.get(i);
System.out.println("phonename=" + e.attributeValue("name"));
List list1 = e.selectNodes("./*");
for (int j = 0; j < list1.size(); j++) {
Element e1 = (Element) list1.get(j);
System.out.println(e1.getName() + "=" + e1.getText());
}
}
} catch (DocumentException e) {
e.printStackTrace();
}
}


public static void main(String[] args) {
String strXML = XMLHandler.createXML();
System.out.println(strXML);
XMLHandler.parserXML(strXML);
System.out.println("-----------");
XMLHandler.parserXMLbyXPath(strXML);
}
}