sax方式解析xml文件(asset文件和网络文件)

edison_cool911

现在写了些博客后,变懒了!!!
1.在anddev.org上参考的一个例子: SaxParseXml.java文件
package cn.com;import java.io.InputStream;import java.net.URL;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.InputSource;import org.xml.sax.XMLReader;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class SaxParseXml extends Activity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle icicle) {super.onCreate(icicle);/* Create a new TextView to display the parsingresult later. */TextView tv = new TextView(this);try {/* Create a URL we want to load some xml-data from. *///URL url = new URL(//"http://www.anddev.org/images/tut/basic/parsingxml/example.xml");InputStream is = getAssets().open("dom.xml");/* Get a SAXParser from the SAXPArserFactory. */SAXParserFactory spf = SAXParserFactory.newInstance();SAXParser sp = spf.newSAXParser();/* Get the XMLReader of the SAXParser we created. */XMLReader xr = sp.getXMLReader();/* Create a new ContentHandler and apply it to the XML-Reader */ExampleHandler myExampleHandler = new ExampleHandler();xr.setContentHandler(myExampleHandler);/* Parse the xml-data from our URL. *///xr.parse(new InputSource(url.openStream()));xr.parse(new InputSource(is));   /* Parsing has finished. *//* Our ExampleHandler now provides the parsed data to us. */ParsedExampleDataSet parsedExampleDataSet = myExampleHandler.getParsedData();/* Set the result to be displayed in our GUI. */tv.setText(parsedExampleDataSet.toString());} catch (Exception e) {/* Display any Error to the GUI. */tv.setText("Error: " + e.getMessage());}/* Display the TextView. */this.setContentView(tv);}}
2. ExampleHandler.java主要承担xml的解析工作
package cn.com;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;public class ExampleHandler extends DefaultHandler {// ===========================================================// Fields// ===========================================================private boolean in_outertag = false;private boolean in_innertag = false;private boolean in_mytag = false;private ParsedExampleDataSet myParsedExampleDataSet = new ParsedExampleDataSet();// ===========================================================// Getter & Setter// ===========================================================public ParsedExampleDataSet getParsedData() {return this.myParsedExampleDataSet;}// ===========================================================// Methods Receive notification of the beginning of the document// ===========================================================@Overridepublic void startDocument() throws SAXException {this.myParsedExampleDataSet = new ParsedExampleDataSet();}@Overridepublic void endDocument() throws SAXException {// Nothing to do}// Gets be called on opening tags like: <tag> Can provide attribute(s), when// xml was like: <tag attribute="attributeValue">//@Overridepublic void startElement(String namespaceURI, String localName,String qName, Attributes atts) throws SAXException {if (localName.equals("outertag")) {this.in_outertag = true;} else if (localName.equals("innertag")) {this.in_innertag = true;} else if (localName.equals("mytag")) {this.in_mytag = true;} else if (localName.equals("tagwithnumber")) {// Extract an AttributeString attrValue = atts.getValue("thenumber");int i = Integer.parseInt(attrValue);myParsedExampleDataSet.setExtractedInt(i);}}/** * Gets be called on closing tags like: </tag> */@Overridepublic void endElement(String namespaceURI, String localName, String qName)throws SAXException {if (localName.equals("outertag")) {this.in_outertag = false;} else if (localName.equals("innertag")) {this.in_innertag = false;} else if (localName.equals("mytag")) {this.in_mytag = false;} else if (localName.equals("tagwithnumber")) {// Nothing to do here}}// Gets be called on the following structure: <tag>characters</tag>@Overridepublic void characters(char ch[], int start, int length) {if (this.in_mytag) {//myParsedExampleDataSet.setFirstTag(new String(ch, start, length));}if (this.in_mytag) {myParsedExampleDataSet.setExtractedString(new String(ch, start,length));}}}

3. ParsedExampleDataSet.java将解析出的内容复制到比如一个对象属性上
package cn.com;public class ParsedExampleDataSet {private String extractedString = null;private int extractedInt = 0;public String getExtractedString() {return extractedString;}public void setExtractedString(String extractedString) {this.extractedString = extractedString;}//public void setFirstTag(String ){//}public int getExtractedInt() {return extractedInt;}public void setExtractedInt(int extractedInt) {this.extractedInt = extractedInt;}public String toString() {return "ExtractedString = " + this.extractedString + "nExtractedInt = "+ this.extractedInt;}}

4.测试的xml文件
<?xml version="1.0" encoding="utf-8"?><outertag><innertag sampleattribute="innertagAttribute"><mytag>anddev.org    gfgf</mytag><tagwithnumber thenumber="1220"/></innertag></outertag>