import org.gwtopenmaps.openlayers.client.layer.VectorOptions; //导入依赖的package包/类
public static VectorLayer createEmptyVectorLayer(
		final VectorLayerConfig layerConfig) {
	final VectorOptions vectorOptions = new VectorOptions();		
	vectorOptions.setProjection(layerConfig.getEpsg());

	return new VectorLayer(layerConfig.getLayerName(), vectorOptions);
}
 

import org.gwtopenmaps.openlayers.client.layer.VectorOptions; //导入依赖的package包/类
public VectorLayer(String name, VectorOptions options) {
	super(name, options);    
	
	this.featureSchema = new FeatureSchema();
	setVectorStyle(new VectorStyleDef());
	addFeatureAddedListener();
	addFeatureSelectListeners();
}
 

import org.gwtopenmaps.openlayers.client.layer.VectorOptions; //导入依赖的package包/类
public OpenLayersPOILayer(Map map, POILayerType layerType) {
	VectorOptions opts = new VectorOptions();
	opts.setMaxResolution(20.0f);
	RendererOptions ropts = new RendererOptions();
	ropts.setZIndexing(true);
	opts.setRendererOptions(ropts);
	String layerName = I18nUtils.tr(false,
			"layer.poi." + layerType.toString());
	if (layerName == null)
		layerName = I18nUtils.tr("layer.poi.default");
	layer = new Vector(layerName, opts);
	layer.setDisplayInLayerSwitcher(false);
	map.addLayer(layer);
	mapProjectionCode = map.getProjection();
}
 

import org.gwtopenmaps.openlayers.client.layer.VectorOptions; //导入依赖的package包/类
/**
 * Inits the vector layer.
 */
private void initVectorLayer()
{
    VectorOptions vectorOption = new VectorOptions();
    vectorOption.setStyle(this.createStyle());
    vectorOption.setDisplayInLayerSwitcher(false);
    this.vector = new Vector("Geofence PREVIEW Vector Layer", vectorOption);
    this.map.addLayer(vector);
}