parsexml.java

一个J2ME游戏,单机玩拼图游戏 ,游戏难度分为简单、一般、困难。简单是把一张图片分成了4块

package util;/*
 * parse xml file
 */

import javax.microedition.io.file.FileConnection;
import javax.microedition.io.Connector;
import java.util.Hashtable;
import java.util.Enumeration;
import java.io.*;

public class ParseXML extends Hashtable {
    InputStream inputStream = null;

    public ParseXML() {
        super();
    }

    public ParseXML(InputStream in) throws Exception {
        try {
            inputStream = in;

            /* get xml string */
            byte[] text = new byte[inputStream.available()];
            inputStream.read(text);
            String xmlText = new String(text);

            /* analyse string */
            if (!"<?".equals(xmlText.substring(0, 2)) || xmlText.indexOf("?>") < 2)
                throw new Exception("The file is not xml File!");
            xmlText = xmlText.substring(xmlText.indexOf("?>") + 2, xmlText.length());
            String title = xmlText.substring(xmlText.indexOf("<") + 1, xmlText.indexOf(">"));
            if ("".equals(title))
                throw new Exception("The file is not xml File!");
            String content = xmlText.substring(xmlText.indexOf(title) + title.length() + 1, xmlText.indexOf("</" + title + ">"));

            this.put(title, parseString(content));

        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public Object parseString(String s) {
        if (s.indexOf("</") <= 2) {/* not paramers */
            return s;
        } else {
            Hashtable hs = new Hashtable();
            while (s.indexOf("</") > 2) {
                String title = s.substring(s.indexOf("<") + 1, s.indexOf(">"));
                String content = s.substring(s.indexOf(title) + title.length() + 1, s.indexOf("</" + title + ">"));
                hs.put(title, parseString(content));

                s = s.substring(s.indexOf("</" + title + ">") + title.length() + 3, s.length());
            }
            return hs;
        }
    }

    public void saveToFile(String path)
    {
        String xml = spellXmlString(this);
        xml =  "<?xml version='1.0' encording='ISO-8859-1'?>" + xml;
/*        try{
            FileConnection file = (FileConnection)Connector.open(path);
            OutputStream out = file.openOutputStream();
            out.write(xml.getBytes());
            out.close();
        }catch(IOException e)
        {
           e.printStackTrace();
        }
*/
    }
    private String spellXmlString(Hashtable hs)
    {
        String xml="";
        Enumeration el = hs.keys();
        while(el.hasMoreElements())
        {
            String key = (String)el.nextElement();
            xml += "<"+key+">";
            if(hs.get(key) instanceof Hashtable)
            {
               xml += spellXmlString((Hashtable)hs.get(key));
            }else
            {
                xml += (String)hs.get(key);
            }
            xml += "</"+key+">";
        }
        return xml;

    }

}