XML解析之SAX解析_city

*******************************************文件放在assets中***和DOM解析不同的是：SAX解析需要写Bean一个类***********************************************************

***************************************************Bean*********************************************************************

public class Languages {
	private String id;
	private String name;
	private String ide;

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getIde() {
		return ide;
	}

	public void setIde(String ide) {
		this.ide = ide;
	}

	@Override
	public String toString() {
		return "Languages [id=" + id + ",name=" + name + ",ide=" + ide + "]";
	}

}

*************************************************************MaActivity.class*****************************************************************

import java.io.IOException;
import java.util.List;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.SAXException;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends Activity {

	private TextView text;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		text = (TextView) findViewById(R.id.text);

		/**
		try {
			// 创建工厂类
			DocumentBuilderFactory factory = DocumentBuilderFactory
					.newInstance();
			// 创建DocumentBuilder
			DocumentBuilder builder = factory.newDocumentBuilder();
			//创建Document
			Document document = builder.parse(getAssets().open("languages.xml"));
			//获得根元素
			Element element = document.getDocumentElement();
			//获取到列表
			String  category = element.getAttribute("category");
			text.append(category+"\n");
			//获取到子节点
			NodeList list = element.getElementsByTagName("item");
			for (int i = 0; i < list.getLength(); i++) {
				Element element2 = (Element) list.item(i);
				String id = element2.getAttribute("id");
				text.append(id+"\n");
				String name = element2.getElementsByTagName("name").item(0).getTextContent();
				text.append(name+"\n");
				String ide = element2.getElementsByTagName("ide").item(0).getTextContent();
				text.append(ide+"\n");
			}
			
		} catch (SAXException e) {
			// Todo Auto-generated catch block
			e.printstacktrace();
		} catch (IOException e) {
			// Todo Auto-generated catch block
			e.printstacktrace();
		}

		catch (ParserConfigurationException e) {
			// Todo Auto-generated catch block
			e.printstacktrace();
		}
		 */
		
		try {
			SAXParserFactory factory = SAXParserFactory.newInstance();
			SAXParser parser =  factory.newSAXParser();
			SAXHandler handler = new SAXHandler();
			parser.parse(getAssets().open("languages.xml"),handler);
			List<Languages> languageList = handler.getLanguageList();
			for (Languages language : languageList) {
				text.append(language.toString() + "\n");
			}
		} catch (ParserConfigurationException e) {
			// Todo Auto-generated catch block
			e.printstacktrace();
		} catch (SAXException e) {
			// Todo Auto-generated catch block
			e.printstacktrace();
		} catch (IOException e) {
			// Todo Auto-generated catch block
			e.printstacktrace();
		}
	}

}

*******************************************************SAXHandler.class**************************************************

import java.util.ArrayList;
import java.util.List;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class SAXHandler extends DefaultHandler {
	
	private List<Languages> languageList;
	private Languages language;
	private String tagName;

	@Override
	public void startDocument() throws SAXException {
		// Todo Auto-generated method stub
		super.startDocument();
		System.out.println("===================开始解析文档==================");
		languageList = new ArrayList<Languages>();
	}

	@Override
	public void startElement(String uri,String localName,String qName,Attributes attributes) throws SAXException {
		// Todo Auto-generated method stub
		super.startElement(uri,localName,qName,attributes);
		tagName = qName;
		System.out.println("-------------开始解析" + qName + "元素－－－－－－－－－－");
		if (qName.equals("item")) {
			language = new Languages();
			language.setId(attributes.getValue("id"));
		}
	}

	@Override
	public void characters(char[] ch,int start,int length)
			throws SAXException {
		// Todo Auto-generated method stub
		super.characters(ch,start,length);
		String value = new String(ch,length);
		if (tagName.equals("name") && !value.trim().equals("")) {
			language.setName(value);
		}else if(tagName.equals("ide") && !value.trim().equals("")){
			language.setIde(value);
		}
	}

	@Override
	public void endElement(String uri,String qName)
			throws SAXException {
		// Todo Auto-generated method stub
		super.endElement(uri,qName);
		System.out.println("-------------结束解析" + qName + "元素－－－－－－－－－－");
		if (qName.equals("item")) {
			languageList.add(language);
		}
	}

	@Override
	public void endDocument() throws SAXException {
		// Todo Auto-generated method stub
		super.endDocument();
		System.out.println("===================结束解析文档==================");
	}

	public List<Languages> getLanguageList() {
		return languageList;
	}
}

***********************************************************以上的XML解析都是很简单的，也容易忘记，希望可以帮助大家**********************************************************