mapcontext.java

一个很有特点的地图平台,可以以动画方试展现电子地图,有拉近,拉远,滑动功能,最主要的是它是一个地图维护台,处理地图到数据库的数据导入

package mapcenter.weihu;

import java.io.*;
import java.util.*;
import org.jdom.*;
import org.jdom.input.SAXBuilder;
import mapcenter.service.*;

public class MapContext {
  private static final Log log = LogFactory.getLog("WebGIS");
  private static HashMap sectionMap = new HashMap();
  private static String saxDriverClass = "org.apache.xerces.parsers.SAXParser";
  private static SAXBuilder builder;

  static{
    try{
      builder = new SAXBuilder(saxDriverClass);
      Document doc = builder.build(new File("config.xml"));
      Element root = doc.getRootElement();
      List sectionList = root.getChildren();
      Iterator sectionListIter = sectionList.iterator();
      while (sectionListIter.hasNext()) {
        //========== 向集合增加一条协议 ============
        Element section = (Element)sectionListIter.next();
        String sectionName = section.getName();
        sectionMap.put(sectionName,new HashMap());
        List paramtList = section.getChildren();
        Iterator paramtListIter = paramtList.iterator();
        for(int i=0; i<paramtList.size(); i++){
          //======== 增加一个字段 ============
          String paramtName = ((Element)paramtListIter.next()).getName();
          String paramtValue = section.getChild(paramtName).getTextTrim();;
          ((HashMap)sectionMap.get(sectionName)).put(paramtName,paramtValue);
        }
      }
    }catch(Exception e){log.error(e);}
  }

  public static String getInitParameter(String paramtName){
    Object value = ((HashMap)sectionMap.get("init")).get(paramtName);
    return (String)value;
  }
  public static String[] getLayerParameter(){
    Object layerStr = ((HashMap)sectionMap.get("implayers")).get("layer");
    String[] layerArray = ((String)layerStr).split("[,]",0);
    return layerArray;
  }
  public static void main(String[] args){
    String[] layers = MapContext.getLayerParameter();
    System.out.println(layers.length);
  }

}