使用KXML解析xml数据
最近做项目，服务器传过来的都是Xml格式的数据，需要解析xml，本来使用的是jsr182这个包，没问题（唯一不足的是手机顽童不支持jsr182，当碰到解析xml数据时，模拟器一闪而过！）。后来看到KXML这个第三方包，听说效率不错，于是用了，结果导入该jar包后总是出现java.lang.NoClassDefFoundError: org/xmlpull/v1/XmlPullParserException很是郁闷！于是干脆下载了源代码，把源代码copy到工程中，运行没问题。
另外nanoXML也可以解析xml，它是一次性加载数据然后解析，当数据量大的时候估计内存吃不消。还有nanoXML的源码中怎么有j2se的类？直接导致我彻底放弃nanoXML。
下面是我用KXML做的代码，大家可以参考：
import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStream;import javax.microedition.io.Connector;import javax.microedition.io.HttpConnection;import org.kxml2.io.KXmlParser;import org.xmlpull.v1.XmlPullParserException;public class Connection implements Runnable{private boolean isProxy = false; //是否使用代理private HttpConnection conn=null;private String url;private String sendDate;private int connTimes = 0;public Connection(String url,String sendDate){this.url=url;this.sendDate=sendDate;}private void send(){InputStream is = null;try{if(isProxy){//使用代理System.out.println("启用http代理连接");conn = (HttpConnection) Connector.open("http://10.0.0.172/");conn.setRequestMethod(HttpConnection.GET);conn.setRequestProperty("X-Online-Host", url);conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0");//Proxy-Connection不是RFC标准，但是很多服务器都这么用了conn.setRequestProperty("Proxy-Connection", "Keep-Alive");}else{System.out.println("启用直连");conn = (HttpConnection) Connector.open("http://"+url);conn.setRequestMethod(HttpConnection.GET);conn.setRequestProperty("User-Agent", "Nokia6500s-1/2.0");conn.setRequestProperty("X-Up-Calling-Line-ID","13761083826");}// Connection是针对HTTP1.0的标准,HTTP1.1默认就是keep-alive的，并且该头不允许在1.1里面使用conn.setRequestProperty("Connection", "Keep-Alive");conn.setRequestProperty("Content-Type","text/xml;charset=UTF-8");if(sendDate!=null){//发送数据conn.setRequestProperty("Content-Length",String.valueOf(sendDate.length()));DataOutputStream dos = new DataOutputStream(conn.openOutputStream());dos.write(sendDate.getBytes("UTF-8"));dos.flush(); dos.close();} //接收数据if(conn.getResponseCode()==HttpConnection.HTTP_OK){is=conn.openInputStream();/*int length = (int) conn.getLength();System.out.println("length="+length);byte[] data=null;DataInputStream dis=new DataInputStream(is);if (length == -1) {int chunkSize = 1500;byte[] buffer = new byte;ByteArrayOutputStream baos = new ByteArrayOutputStream();int dataSizeRead = 0;// size of data read from input stream.while ((dataSizeRead = is.read(buffer)) != -1) {baos.write(buffer, 0, dataSizeRead);}data = baos.toByteArray();baos.close();} else if (length == 0) {} else {// known lengthdata = new byte;dis.readFully(data);}String text=null;try {text=new String(data, "UTF-8");} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println("[收到数据]"+text);*/parseXml(is);}else{System.out.println("无法连接服务器，返回码："+conn.getResponseCode());}}catch (Exception e) {// TODO: handle exceptionSystem.out.println("重新尝试连接:"+(connTimes+1));if (connTimes < 2) {connTimes++;isProxy=!isProxy;//send();} else {connTimes = 0;System.out.println("无法连接服务器");//Consts.isWaiting=false;//Consts.hasError=true;}}finally{try {if (is != null)is.close();if (conn != null)conn.close();} catch (Throwable t) {System.out.println("Exception occurred while closing input stream.");}}}private void parseXml(InputStream is){KXmlParser parser = new KXmlParser();try {parser.setInput(is,"UTF-8");int eventType=parser.getEventType();System.out.println("eventType="+eventType);if(eventType==KXmlParser.START_DOCUMENT){startDocument(parser);}boolean keepParsing = true;while(keepParsing){int type = parser.next(); switch(type){ case KXmlParser.START_DOCUMENT: //startDocument(parser);//这里总是执行不到，可以去掉 break; case KXmlParser.START_TAG: startElement(parser); break; case KXmlParser.END_TAG: endElement(parser); break; case KXmlParser.TEXT: characters(parser); break; case KXmlParser.END_DOCUMENT: endDocument(parser); keepParsing = false; break; } }} catch (XmlPullParserException e) {// TODO Auto-generated catch blocke.printStackTrace();}catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} }public void startDocument(KXmlParser parser){}public void endDocument(KXmlParser parser){ }String tagName=null;public void startElement(KXmlParser parser){ this.tagName = parser.getName(); System.out.println("key:" + this.tagName); int attributeCount= parser.getAttributeCount(); String winTermNo=parser.getAttributeValue(null, "winTermNo"); System.out.println("winTermNo="+winTermNo);// for(int i=0;i<attributeCount;i++){// System.out.println(parser.getAttributeName(i)+":"+parser.getAttributeValue(i));// } } public void endElement(KXmlParser parser){ } public void characters(KXmlParser parser){ String content = parser.getText(); System.out.println(tagName + ":" + content); if (tagName.equals("lottery")){ System.out.println(content); } else if(tagName.equals("gameInfo")){ System.out.println(content); } this.tagName = null; } public void run() {// TODO Auto-generated method stubsend();}public static void main(String[] args) {// TODO Auto-generated method stubConnection c=new Connection("127.0.0.1:8080/Lottery/kjava.portal?action=lotterySimpleInfo",null);Thread t=new Thread(c);t.start();}}
当然，像上面的startXXX(),endXXX()需要自己实现，最好做成接口！
我访问上面的地址返回的xml为：
<message><lottery winTermNo="10098" lotteryResult="0409152528|0405" termNo="10099" deadLine="20100825193000" /> <lottery winTermNo="10228" lotteryResult="000" termNo="10229" deadLine="20100824193000" /> <lottery winTermNo="10228" lotteryResult="00000" termNo="10229" deadLine="20100824193000" /> <lottery winTermNo="10098" lotteryResult="2268381" termNo="10099" deadLine="20100824193000" /> <lottery winTermNo="10073" lotteryResult="33333333333333" termNo="" deadLine="" /> <gameInfo id="1" homeTeam="阿尔科孔" awayTeam="塞尔塔" gameDate="08-30 11:51" leagueMatch="国王杯" /> <gameInfo id="2" homeTeam="皇家贝蒂斯" awayTeam="萨拉曼卡" gameDate="08-30 11:51" leagueMatch="国王杯" /> <gameInfo id="3" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="4" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="5" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="6" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="7" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="8" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="9" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="10" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="11" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="12" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="13" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> <gameInfo id="14" homeTeam="弗鲁米嫩塞" awayTeam="帕尔梅拉斯" gameDate="08-30 11:51" leagueMatch="巴甲" /> </message>
最后，提供KXML源码：
页:
[1]