【解决办法】
必须在给表结构添加几何对象字段时指定坐标系对象，否则坐标系对象为null。具体步骤示例：
val builder = new SimpleFeatureTypeBuilder()
builder.init(simType)
val crs = CRS.decode( "EPSG:4527" )
builder.crs(crs)
builder.add("geometry", classOf[MultiPolygon], crs)
val newFeatureType: SimpleFeatureType = builder.buildFeatureType()
