Posted on 2007-03-20 17:16
Kevin Meng 閱讀(384)
評論(1) 編輯 收藏
下面是矩形選擇的源代碼。多邊形選擇多加點就可以了。
public?class?RectSelectAction?extends?Action?
{
????//?---------------------------------------------------------?Instance
????//?Variables
????//?---------------------------------------------------------?Methods
????/**?*//**
?????*?Method?execute
?????*?
?????*?@param?mapping
?????*?@param?form
?????*?@param?request
?????*?@param?response
?????*?@return?ActionForward
?????*/
????public?ActionForward?execute(ActionMapping?mapping,?ActionForm?form,
????????????HttpServletRequest?request,?HttpServletResponse?response)?{
????????DynaActionForm?rectSelectForm?=?(DynaActionForm)?form;
????????String?startx?=?rectSelectForm.getString("startx");
????????String?starty?=?rectSelectForm.getString("starty");
????????String?endx?=?rectSelectForm.getString("endx");
????????String?endy?=?rectSelectForm.getString("endy");
????????Map?map?=?(Map)?request.getSession().getAttribute("THEMAP");
????????Polygon?polygon?=?this.creatPolygon(map,?startx,?starty,?endx,?endy);
????????if?(polygon?==?null)?{
????????????ActionMessages?msgs?=?new?ActionMessages();
????????????msgs.add(ActionMessages.GLOBAL_MESSAGE,?new?ActionMessage(
????????????????????"com.suzhou.message.createPolygonFail"));
????????????this.saveMessages(request,?msgs);
????????????return?mapping.findForward("resultPage");
????????}
????????FeatureLayer?menpaiLayer?=?null;
????????for?(int?i?=?0;?i?<?map.getLayers().getCount();?i++)?{
????????????if?(map.getLayers().item(i).getName().equals("地物點"))?{
????????????????menpaiLayer?=?(FeatureLayer)?map.getLayers().item(i);
????????????????System.out.println(menpaiLayer.getName());
????????????????System.out.println(menpaiLayer.getID());
????????????}
????????}
????????if?(menpaiLayer?==?null)?{
????????????ActionMessages?msgs?=?new?ActionMessages();
????????????msgs.add(ActionMessages.GLOBAL_MESSAGE,?new?ActionMessage(
????????????????????"com.suzhou.message.layerNotExsist",?"地物點"));
????????????this.saveMessages(request,?msgs);
????????????return?mapping.findForward("resultPage");
????????}
????????map.getLayers().setGeometry(true);//?設置返回空間信息
????????menpaiLayer.getRecordset().clearRecordset();
????????menpaiLayer.getRecordset().clearEnvelope();
????????menpaiLayer.getRecordset().clearGeometry();
????????map.getLayers().setOrder(false);
????????menpaiLayer.setFilterObject(null);
????????Filter?filter2?=?new?Filter();
//????????filter2.addSubField("BLOCKNAME");
//????????filter2.addSubField("MPNUM");
//????????filter2.addSubField("MPABNAME");
//????????filter2.addSubField("MPSUBNUM");
????????//filter2.setWhereExpression("");
????????filter2.setGlobalEnvelope(true);
????????filter2.setSpatialShape(polygon);
????????filter2.setRelation(Filter.AREA_INTERSECTION);
????????menpaiLayer.setFilterObject(filter2);
????????map.refresh();
????????menpaiLayer.setFilterObject(null);
????????if?(menpaiLayer.getRecordset()?==?null
????????????????||?menpaiLayer.getRecordset().getCount()?<?1)?{
????????????ActionMessages?msgs?=?new?ActionMessages();
????????????msgs.add(ActionMessages.GLOBAL_MESSAGE,?new?ActionMessage(
????????????????????"com.suzhou.message.objectNotFound"));
????????????this.saveMessages(request,?msgs);
????????????return?mapping.findForward("resultPage");
????????}else{
????????????request.setAttribute("result",menpaiLayer.getRecordset());
????????????return?mapping.findForward("resultPage");
????????}
????}
????/**?*//**
?????*?建立矩形
?????*?
?????*?@param?map
?????*?@param?startx:起點屏幕X坐標
?????*?@param?starty:起點屏幕Y坐標
?????*?@param?endx:終點屏幕X坐標
?????*?@param?endy：終點屏幕Y坐標
?????*?@return
?????*/
????public?Polygon?creatPolygon(Map?map,?String?startx,?String?starty,
????????????String?endx,?String?endy)?{
????????try?{
????????????Point?pnt1?=?map.toMapPoint(new?Double(startx).doubleValue(),
????????????????????new?Double(starty).doubleValue());
????????????Point?pnt2?=?map.toMapPoint(new?Double(endx).doubleValue(),
????????????????????new?Double(endy).doubleValue());
????????????Point?pnt11?=?new?Point();
????????????Point?pnt22?=?new?Point();
????????????pnt11.setX(pnt1.getX());
????????????pnt11.setY(pnt2.getY());
????????????pnt22.setX(pnt2.getX());
????????????pnt22.setY(pnt1.getY());
????????????Points?points?=?new?Points();
????????????points.addPointObject(pnt1);
????????????points.addPointObject(pnt11);
????????????points.addPointObject(pnt2);
????????????points.addPointObject(pnt22);
????????????Ring?ring?=?new?Ring();
????????????ring.setPoints(points);
????????????Polygon?polygon?=?new?Polygon();
????????????polygon.addRing(ring);
????????????return?polygon;
????????}?catch?(Exception?ex)?{
????????????return?null;
????????}
????}
}