Android 创建与解析XML Dom方式

package com.homer.xml; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.StringWriter; import java.util.Properties; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys; 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 org.w3c.dom.DOMException; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.SAXException; import android.content.Context; public class XMLDom { private final String fileName = "myDomXML.xml"; private Context mContext = null; public XMLDom(Context context){ this.mContext = context; } /** Dom方式，创建 XML */ public String XMLCreate() { String xmlWriter = null; Person []persons = new Person[3]; // 创建节点Person对象 persons[0] = new Person(1, "sunboy_2050", "http://blog.csdn.net/sunboy_2050"); persons[1] = new Person(2, "baidu", "http://www.baidu.com"); persons[2] = new Person(3, "google", "http://www.google.com"); try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.newDocument(); Element eleRoot = doc.createElement("root"); eleRoot.setAttribute("author", "homer"); eleRoot.setAttribute("date", "2012-04-26"); doc.appendChild(eleRoot); int personsLen = persons.length; for(int i=0; i<personsLen; i++) { Element elePerson = doc.createElement("person"); eleRoot.appendChild(elePerson); Element eleId = doc.createElement("id"); Node nodeId = doc.createTextNode(persons[i].getId() + ""); eleId.appendChild(nodeId); elePerson.appendChild(eleId); Element eleName = doc.createElement("name"); Node nodeName = doc.createTextNode(persons[i].getName()); eleName.appendChild(nodeName); elePerson.appendChild(eleName); Element eleBlog = doc.createElement("blog"); Node nodeBlog = doc.createTextNode(persons[i].getBlog()); eleBlog.appendChild(nodeBlog); elePerson.appendChild(eleBlog); } Properties properties = new Properties(); properties.setProperty(OutputKeys.INDENT, "yes"); properties.setProperty(OutputKeys.MEDIA_TYPE, "xml"); properties.setProperty(OutputKeys.VERSION, "1.0"); properties.setProperty(OutputKeys.ENCODING, "utf-8"); properties.setProperty(OutputKeys.METHOD, "xml"); properties.setProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); transformer.setOutputProperties(properties); DOMSource domSource = new DOMSource(doc.getDocumentElement()); OutputStream output = new ByteArrayOutputStream(); StreamResult result = new StreamResult(output); transformer.transform(domSource, result); xmlWriter = output.toString(); } catch (ParserConfigurationException e) { // factory.newDocumentBuilder e.printStackTrace(); } catch (DOMException e) { // doc.createElement e.printStackTrace(); } catch (TransformerFactoryConfigurationError e) { // TransformerFactory.newInstance e.printStackTrace(); } catch (TransformerConfigurationException e) { // transformerFactory.newTransformer e.printStackTrace(); } catch (TransformerException e) { // transformer.transform e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } savedXML(fileName, xmlWriter.toString()); return xmlWriter.toString(); } /** Dom方式，解析 XML */ public String XMLResolve() { StringWriter xmlWriter = new StringWriter(); InputStream is= readXML(fileName); try { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document doc = builder.parse(is); doc.getDocumentElement().normalize(); NodeList nlRoot = doc.getElementsByTagName("root"); Element eleRoot = (Element)nlRoot.item(0); String attrAuthor = eleRoot.getAttribute("author"); String attrDate = eleRoot.getAttribute("date"); xmlWriter.append("root").append("\t\t"); xmlWriter.append(attrAuthor).append("\t"); xmlWriter.append(attrDate).append("\n"); NodeList nlPerson = eleRoot.getElementsByTagName("person"); int personsLen = nlPerson.getLength(); Person []persons = new Person[personsLen]; for(int i=0; i<personsLen; i++) { Element elePerson = (Element) nlPerson.item(i); // person节点 Person person = new Person(); // 创建Person对象 NodeList nlId = elePerson.getElementsByTagName("id"); Element eleId = (Element)nlId.item(0); String id = eleId.getChildNodes().item(0).getNodeValue(); person.setId(Integer.parseInt(id)); NodeList nlName = elePerson.getElementsByTagName("name"); Element eleName = (Element)nlName.item(0); String name = eleName.getChildNodes().item(0).getNodeValue(); person.setName(name); NodeList nlBlog = elePerson.getElementsByTagName("blog"); Element eleBlog = (Element)nlBlog.item(0); String blog = eleBlog.getChildNodes().item(0).getNodeValue(); person.setBlog(blog); xmlWriter.append(person.toString()).append("\n"); persons[i] = person; } } catch (ParserConfigurationException e) { // factory.newDocumentBuilder e.printStackTrace(); } catch (SAXException e) { // builder.parse e.printStackTrace(); } catch (IOException e) { // builder.parse e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return xmlWriter.toString(); } private void savedXML(String fileName, String xml) { FileOutputStream fos = null; try { fos = mContext.openFileOutput(fileName, mContext.MODE_PRIVATE); byte []buffer = xml.getBytes(); fos.write(buffer); fos.close(); } catch (FileNotFoundException e) { // mContext.openFileOutput e.printStackTrace(); } catch (IOException e) { // fos.write e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } private InputStream readXML(String fileName) { FileInputStream fin = null; try { fin = mContext.openFileInput(fileName); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return fin; } }