Geotools Vector ShapeFile 打开矢量文件，根据传入范围获取几何模型及属性

/**
 * 根据点集获取面几何模型
 * @param points 点集
 * @return 返回polygon
 */
public static ShapefileDataStore instance(){
  File file = new File (Utils.getFeatureFile());
  if(featureSource == null){
    try{
      featureSource = new ShapefileDataStore(file.toURL());
    }catch (Exception e){
      e.printStackTrace();
    }
  }

  return  featureSource;
}

/**
 * 返回与geom相交的进行相交处理的几何模型
 * @param features 要素集
 * @param geom 几何模型
 * @return 返回几何模型集
 */
public static List<String> getFieldByEnvelop(ShapefileDataStore source,Geometry geom,String fieldName){
  List<String> files = new ArrayList<>();
  try{
    ContentFeatureSource featureSource = source.getFeatureSource();
    SimpleFeatureIterator iterator = featureSource.getFeatures().features();
    while(iterator.hasNext()){
      SimpleFeature feature =iterator.next();
      SimpleFeatureType featureType = feature.getFeatureType();
      Geometry  defaultGeometry = (Geometry)feature.getDefaultGeometry();

      //相交
      if(defaultGeometry.intersects(geom)){
        String jc = feature.getProperty(fieldName).getValue().toString();
        files.add(jc);
      }
    }
  }catch (Exception e){
    e.printStackTrace();
    return null;
  }

  return files;
}