安卓课程十一 解析xml (Dom 解析)
<?xml version="1.0" encoding="utf-8"?><rivers> <river name="灵渠" length="605"> <introduction> 灵渠在广西壮族自治区兴安县境内，是世界上最古老的运河之一，有着“世界古代水利建筑明珠”的美誉。灵渠古称秦凿渠、零渠、陡河、兴安运河，于公元前214年凿成通航，距今已2217年，仍然发挥着功用。 </introduction> <imageurl> http://imgsrc.baidu.com/baike/pic/item/389aa8fdb7b8322e08244d3c.jpg </imageurl> </river></rivers>
import java.io.Serializable;public class River implements Serializable { private static final long serialVersionUID = 1L; private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getLength() { return length; } public void setLength(int length) { this.length = length; } public String getIntroduction() { return introduction; } public void setIntroduction(String introduction) { this.introduction = introduction; } public String getImageurl() { return imageurl; } public void setImageurl(String imageurl) { this.imageurl = imageurl; } private int length; private String introduction; private String imageurl; }
import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.NodeList;import org.xml.sax.SAXException;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import entity.River;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_table);try {InputStream is = this.getResources().getAssets().open("river.xml");List<River> rivers = this.getRiversFromXml( is);System.out.println(rivers.size());} catch (IOException e) {e.printStackTrace();} catch (SAXException e) {e.printStackTrace();} catch (ParserConfigurationException e) {e.printStackTrace();}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}//获取全部河流数据 /** * 参数fileName：为xml文档路径 * @throws IOException * @throws SAXException * @throws ParserConfigurationException */ public List<River> getRiversFromXml( InputStream inputStream) throws SAXException, IOException, ParserConfigurationException{ DocumentBuilderFactory f=DocumentBuilderFactory.newInstance(); DocumentBuilder builder = f.newDocumentBuilder(); Document doc=builder.parse(inputStream); NodeList list=doc.getElementsByTagName("river"); List<River> rivers = new ArrayList<River>(); for(int i=0;i<list.getLength();i++){ Element el=(Element) list.item(i); River river = new River(); river.setImageurl(this.getSubelementTextContentByName(el, "imageurl")); river.setIntroduction(this.getSubelementTextContentByName(el, "introduction")); river.setLength(Integer.parseInt( el.getAttribute("length"))); river.setName(el.getAttribute("name")); rivers.add(river) ; } return rivers; } private String getSubelementTextContentByName(Element el, String name) { NodeList list=el.getElementsByTagName(name); Element e=(Element) list.item(0); return e.getTextContent(); } }
import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import android.app.Activity;import android.os.Bundle;import android.util.Xml;import android.view.Menu;import entity.River;public class MainActivity extends Activity {private String tagName; @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_table); InputStream is;try {is = this.getResources().getAssets().open("river.xml");List<River> rivers = this.getRiversFromXml( is);System.out.println(rivers.size());} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (XmlPullParserException e) {// TODO Auto-generated catch blocke.printStackTrace();} }@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main, menu);return true;}//获取全部河流数据 /** * 参数fileName：为xml文档路径 * @throws XmlPullParserException * @throws IOException */ public List<River> getRiversFromXml( InputStream in) throws XmlPullParserException, IOException { List<River> rivers=null; River river=null;XmlPullParser parser=Xml.newPullParser();parser.setInput(in, "utf-8");//获取事件类型int eventType=parser.getEventType();while(eventType!=XmlPullParser.END_DOCUMENT){switch(eventType){//文档开始case XmlPullParser.START_DOCUMENT:rivers=new ArrayList<River>(); break;case XmlPullParser.START_TAG:tagName = parser.getName();if("river".equals(tagName)){river=new River();river.setName( parser.getAttributeValue(0));river.setLength(Integer.parseInt( parser.getAttributeValue(1))); }else if("introduction".equals(tagName)){river.setIntroduction( parser.nextText());}else if("imageurl".equals(tagName)){river.setImageurl( parser.nextText());}break;case XmlPullParser.END_TAG:if("river".equals(parser.getName())){rivers.add(river);}break;}eventType=parser.next();} return rivers; } }
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