基于Java的实例源码-Google地图JSP标签库.zip

package com.lamatek.tags.google; import java.io.Serializable; import java.util.Enumeration; import java.util.Hashtable; import java.util.Vector; import javax.servlet.jsp.JspWriter; import javax.servlet.jsp.tagext.BodyTagSupport; import com.lamatek.tags.google.beans.TrafficEventBean; import com.lamatek.tags.google.beans.XMLParser; /** * GoogleMapTag * * This class represents a <googlemaps;map> tag. Developers should not subclass or override this * class or it's methods. * * @author Tom Cole * @version 0.40 */ public class GoogleMapTag extends BodyTagSupport implements Serializable, GoogleMapEventListener { static final int SMALL_ZOOM_CONTROL = 0; static final int LARGE_ZOOM_CONTROL = 1; Hashtable markers = null; Hashtable points = null; Hashtable polylines = null; Hashtable circles = null; Hashtable polygons = null; Hashtable boxes = null; Hashtable traffic_tags = null; Hashtable overlays = null; Hashtable mapTypes = null; Hashtable wms = null; Vector events = null; Vector labels = null; Vector inserts = null; Hashtable keys = null; boolean showTypeControl = false; boolean showZoomControl = false; boolean showPanControl = true; boolean showScaleControl = false; boolean mouseWheelSupport = false; boolean panEnabled = true; String version = "2"; String id = null; int zoomControlSize = SMALL_ZOOM_CONTROL; String width = null; String height = null; String type = "map"; int zoom = -1; String scope = "page"; double centerLatitude = -181.00d; double centerLongitude = -181.00d; double smallLon = 180.00d; double smallLat = 180.00d; double largeLon = -180.00d; double largeLat = -180.00; String body = ""; GoogleMapMessageTag message = null; GoogleMapOverviewTag overviewControl = null; GoogleMapClusterTag clusterer = null; GoogleMapCoordinatesTag coords = null; String xml = null; boolean debug = false; boolean headless = false; int minZoom = 0; int maxZoom = 17; boolean bound = false; String language = "en"; boolean showDaylight = false; /** * Overrides doStartTag from BodyTagSupport. Developers should not override this * method. */ public int doStartTag() { if (scope.equalsIgnoreCase("site")) { if (pageContext.getSession().getAttribute(id) == null) { if (xml != null) { parseXML(); } return EVAL_BODY_INCLUDE; } } else { if (pageContext.getAttribute(id) == null) { if (xml != null) { parseXML(); } return EVAL_BODY_INCLUDE; } } return SKIP_BODY; } /** * Parses the defined XML file (or generator), if specified, and adds the resulting entities... * */ private void parseXML() { XMLParser.parseXML(xml, this); } /** * Overrides doEndTag from BodyTagSupport. Developers should not override this * method. */ public int doEndTag() { if (scope.equalsIgnoreCase("site")) { if (pageContext.getSession().getAttribute(id) == null) pageContext.getSession().setAttribute(id, this); } else { if (pageContext.getAttribute(id) == null) pageContext.setAttribute(id, this); } return EVAL_PAGE; } /** * This method adds a GoogleMapMarkerTag to the map. * * @param marker An initialized GoogleMapMarkerTag. */ public void addMarker(GoogleMapMarkerTag marker) { if (markers == null) markers = new Hashtable(); markers.put(marker.getId(), marker); } /** * Removes a previously added GoogleMapMarkerTag from this map. * * @param marker The GoogleMapMarkerTag to remove. */ public void removeMarker(GoogleMapMarkerTag marker) { if (markers != null && marker != null) { markers.remove(marker.getId()); } } /** * Retrieves a GoogleMapMarkerTag by it's id. * * @param name The id of the GoogleMapMarkerTag to retrieve. * @return The GoogleMapMarkerTag with this id, or null. */ public GoogleMapMarkerTag getMarker(String name) { if (markers != null) { return (GoogleMapMarkerTag) markers.get(name); } else { return null; } } /** * Adds a map type to the map storing it by id. * * @param mapType An initialized GoogleMapMapTypeTag */ public void addMapType(GoogleMapMapTypeTag mapType) { if (mapTypes == null) mapTypes = new Hashtable(); mapTypes.put(mapType.getId(), mapType); } /** * Returns the GoogleMapMapTypeTag with the given id * or null if it cannot be found. * * @return A GoogleMapMapTypeTag with the given id or null. */ public GoogleMapMapTypeTag getMapType(String id) { if (mapTypes == null) return null; else return (GoogleMapMapTypeTag) mapTypes.get(id); } /** * Removes the map type with the given id. * * @param id The id of the map type to remove. */ public void removeMapType(String id) { if (mapTypes != null) mapTypes.remove(id); } /** * Retrieves a GoogleMapBoxtag by it's id. * * @param name The id of the GoogleMapBoxTag to retrieve. * @return A GoogleMapBoxTag with the given id or null. */ public GoogleMapBoxTag getBox(String name) { if (boxes != null) return (GoogleMapBoxTag) boxes.get(name); else return null; } /** * Retrieves a GoogleMapCircletag by it's id. * * @param name The id of the GoogleMapCircleTag to retrieve. * @return A GoogleMapCircleTag with the given id or null. */ public GoogleMapCircleTag getCircle(String name) { if (circles != null) return (GoogleMapCircleTag) circles.get(name); else return null; } /** * Retrieves a GoogleMapImageOverlayTag by it's id. * * @param name the id of the GoogleMapImageOvelay to retrieve. * @return A GoogleMapImageOverlayTag with the given id, or null. */ public GoogleMapImageOverlayTag getImageOverlay(String name) { if (overlays == null) return null; else return (GoogleMapImageOverlayTag) overlays.get(name); } /** * Retrieves a GoogleMapPolygonTag by it's id. * * @param name The id of the GoogleMapPolygonTag to retrieve. * @return A GoogleMapPolygonTag with the given id or null. */ public GoogleMapPolygonTag getPolygon(String name) { if (polygons != null) return (GoogleMapPolygonTag) polygons.get(name); else return null; } /** * Retrieves a GoogleMapPolylineTag by it's id. * * @param name The id of the GoogleMapPolylineTag to retrieve. * @return A GoogleMapPolylineTag with the given id or null. */ public GoogleMapPolylineTag getPolyline(String name) { if (polylines != null) return (GoogleMapPolylineTag) polylines.get(name); else return null; } /** * Adds a new GoogleMapPointTag to this map. GoogleMapPointTags are used * as location references for all overlays (markers, circles, boxes, * polygons and polylines) in a map. * * @param point The initialized GoogleMapPointTag to add. */ p