Posted on 2007-03-20 17:16
Kevin Meng 阅读(384)
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下面是矩形选择的源代码。多边形选择多加点就可以了。
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("地物点")) {
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", "地物点"));
this.saveMessages(request, msgs);
return mapping.findForward("resultPage");
}
map.getLayers().setGeometry(true);// 设置返回空间信息
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:起点屏幕X坐标
* @param starty:起点屏幕Y坐标
* @param endx:终点屏幕X坐标
* @param endy：终点屏幕Y坐标
* @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;
}
}
}