Java ME引路蜂地图开发示例：IP地址查询

IP地址查询，可以根据IP地址查询到该IP所在的地理经纬度坐标，比如下述例子查询IP 地址58.192.32.1，所在经纬度为118.777802,32.061699，为南京大学所在地.

注：目前IP查询结果总是以英文返回，如上述结果详细内容。ISP：”China Education and Research Network”Organization: “Nan Jing University”Country: “CN”City: “Nanjing”若想知道该经纬度对应的地名，可以使用地址反编码服务。你可以输入 127.0.0.1 查询本机地址。

package com.pstreets.gisengine.demo.midp; 
  
//--------------------------------- IMPORTS ------------------------------------ 
import com.mapdigit.gis.DigitalMap; 
import com.mapdigit.gis.MapPoint; 
import com.mapdigit.gis.geometry.GeoLatLng; 
import com.mapdigit.gis.raster.MapType; 
import com.mapdigit.gis.service.IIpAddressGeocodingListener; 
import com.pstreets.gisengine.demo.MapDemoMIDP; 
import com.mapdigit.gis.service.IpAddressLocation; 
import javax.microedition.lcdui.Command; 
import javax.microedition.lcdui.CommandListener; 
import javax.microedition.lcdui.Display; 
import javax.microedition.lcdui.Displayable; 
  
//[------------------------------ MAIN CLASS ----------------------------------] 
//--------------------------------- REVISIONS ---------------------------------- 
// Date       Name                 Tracking #         Description 
// --------   -------------------  -------------      -------------------------- 
// 28JAN2011  James Shen                              Initial Creation 
//////////////////////////////////////////////////////////////////////////////// 
public class MapIpSearchMIDP extends MapDemoMIDP implements CommandListener, 
        IIpAddressGeocodingListener { 
  
    private Command mapFindAddressCommand = new Command("Find Address", 
            Command.OK, 1); 
  
    public void startApp() { 
  
        init(); 
        canvas.addCommand(mapFindAddressCommand); 
        map.setIpAddressGeocodingListener(this); 
        canvas.setCommandListener(this); 
        GeoLatLng center = new GeoLatLng(32.0616667, 118.7777778); 
        map.setCenter(center, 15, MapType.MICROSOFTCHINA); 
        Display.getDisplay(this).setCurrent(canvas); 
    } 
  
    public void commandAction(Command c, Displayable d) { 
        if (c == mapFindAddressCommand) { 
            map.getIpLocations("58.192.32.1"); 
        } 
    } 
  
    public void done(String query, IpAddressLocation result) { 
        if (result != null && result.error.length() == 0
                && result.longitude.length() > 0
                && result.longitude.length() > 0) { 
            try { 
  
                MapPoint mapPoint = new MapPoint(); 
                String latLng = "[" + result.longitude + ","
                        + result.latitude + ",0]"; 
                mapPoint.point = DigitalMap.fromStringToLatLng(latLng); 
                mapPoint.setName(result.organization); 
                mapPoint.setNote(result.city + " " + result.country); 
                map.panTo(mapPoint.point); 
            } catch (Exception e) { 
  
                result.error = "IP_NOT_FOUND"; 
            } 
        } 
    } 
}