¸ù¾Ý¾Î³¶ÈÇóÁ½µã¼ä¾àÀëʵÏÖÔ´Âë(java)
Ñо¿ÁËÒ»ÏÂGoogle
MapÉϵĸù¾Ý¾Î³¶ÈÇóµØÇò±íÃæÁ½µã¼ä¾àÀëµÄʵÏÖ£¬ ÓÃjavaʵÏÖÁËÒ»°Ñ£¬¶ÔÎÒ¹ú¾³ÄÚµÄBeijing54, Xian80,WGS84ÈýÖÖ×ø±êϵµÄ¿Õ¼ä¾àÀë¼ÆËã¸Ð¾õÕâ¸öʵÏÖÊDZȽÏ׼ȷµÄ¡£µ±È»£¬ÕâÀïÖ»ÊǸöÈ˵ĸоõ¶øÒÑ¡£¡£¡£¿ÉÄÜÎÒ»¹Ã»ÓÐÓöµ½ÄÇÖÖ¶Ô¾«¶ÈÒªÇó·Ç³£ÑϸñµÄµØ·½£¬»òÐí£¬±¾ÉíÎÒÕâ¸ö·½Ê½¾ÍÊÇ´íÎóµÄ¡£¡£¡£ºÇºÇ¡£¡£¡£ÕâÀïÖ»ÊÇ×÷¸ö¼ÇºÅÏÈ¡£¡£¡£¸÷λ´ïÈ˶à¶àÖ¸½Ì
package
com.geotools.test;
public class GeoUtils {
public
enum GaussSphere{
Beijing54,
Xian80,
WGS84,
}
private static double Rad(double d){
return d
* Math.PI / 180.0;
}
public double DistanceOfTwoPoints(double
lng1,double lat1,double lng2,double lat2,
GaussSphere gs){
double radLat1 = Rad(lat1);
double radLat2 = Rad(lat2);
double a = radLat1 - radLat2;
double b = Rad(lng1) -
Rad(lng2);
double s = 2 *
Math.asin(Math.sqrt(Math.pow(Math.sin(a/2),2) +
Math.cos(radLat1) *
Math.cos(radLat2) * Math.pow(Math.sin(b/2),2)));
s = s * (gs ==
GaussSphere.WGS84 ? 6378137.0 : (gs == GaussSphere.Xian80 ? 6378140.0 :
6378245.0));
s = Math.round(s * 10000) / 10000;
return
s;
}
}
Ïà¹ØÎĵµ£º
java¿ª·¢µÄ³ÌÐòµÄ±£»¤
ÖÚËùÖÜÖª£¬javaΪ¿ª·¢ÓïÑÔÌṩÁ˺ܷ½±ãµÄ¿ª·¢Æ½Ì¨£¬µ«¿ª·¢³öÀ´µÄ³ÌÐòºÜÈÝÒ×ÔÚ²»Í¬µÄƽ̨ÉÏÃæ±»ÒÆÖ²£¬ÏÖÔÚÔ½À´Ô½¶àµÄÈËʹÓÃËü¿ª·¢Èí¼þ¡£
JavaÓÐËü·½±ãµÄÒ»¸ö·½Ã棬µ«ËüͬʱҲ´ø¸øÁË¿ª·¢ÕßÒ»¸ö·³ÄÕ£¬Õâ¾ÍÊDZ£»¤µÄ°ì·¨²»¶à£¬¶øÇÒ´ó¶àÊý²»ÊǺܺ ......
¸ÅÒª£ºJava¼¯ºÏAPIÔ¶²»Ö¹ÊÇÊý×éµÄÌæ´úÆ·£¬¾¡¹ÜÄÇÊÇÒ»¸ö²»»µµÄÈÏÖªÆðµã¡£Ted NewardչʾÁË5¸öÄܸü´óÀûÓü¯ºÏ¿ò¼ÜµÄÇÏÃÅ£¬°üº¬Ò»¸ö¶¨ÖƲ¢À©Õ¹Java¼¯ºÏAPIµÄÈëÃż¶Ó¦Óá£
¶ÔÓÚÐí¶àJava¿ª·¢Õß¶øÑÔ£¬Java¼¯ºÏAPIÊDZê×¼µÄJavaÊý×é¼°ÆäÈ«²¿È±µãµÄ±ØÒªÌæ´úÆ·¡£½«¼¯ºÏ¿ò¼ÜÖ÷ÒªÓëArrayListÁªÏµÆðÀ´²¢²»ÊÇÒ ......
JAVA¼¼ÇÉ(Java¶¨Ê±Ö´ÐÐÈÎÎñµÄʵÏÖ·½·¨)2009Äê02ÔÂ07ÈÕ ÐÇÆÚÁù 10:36¶¨Ê±Ö´ÐÐÈÎÎñµÄÈýÖÖ·½·¨:
1£©java.util.Timer.
2£©ServletContextListener.
3)org.springframework.scheduling.timer.ScheduledTimerTask & ......
ѧ.NET¾ÍºÃ±ÈºÍµùÂèÒ»Æð³öÃÅ£¬É¶Ê¶¼²»ÓóÒòΪµùÂè¶¼¸øÄã²ÙÐÄ×ÅÁË¡£
ѧJava¾ÍÏñ×Ô¼º³öÃÅ£¬ÄãÒªÕö´óÑÛ¾¦¿´ÇåÖÜΧµÄÊÀ½ç£¬²¢¾ö¶¨Äã×Ô¼ºµÄ·½Ïò£»
±ØÒªµÄʱºò£¬ÄãÒªÍÑÀëÒ»ÇÐÊø¸¿£¬×Ô¼º¸ãÒ»Ì׿ò¼ÜÀ´ÊÊÓ¦ÌØÊâÐèÇó¡£
ÔÚJavaµÄÊÀ½çÀÓÐ×ÅÐÎÐÎɫɫµÄ¿ªÔ´²úÆ·ºÍ¿ò¼Ü¡£
ËüÃǾͺÃÏñÄãÔÚÒì ......