Java 使用功能将jts转换为GeoJSON时出现类型错误

我有一个Java POJO“任务”和GIS几何，我正试图转换为GeoJSON的功能

我用来进行转换的库是

我的测试用例代码是这样的，当我试图将它传递给阅读器时，错误出现在字符串geoJson上

    GeometryFactory gf = new GeometryFactory();
    Double y = -36.829;
    Double x = 174.896;

    Task testTask = new Task();
    testTask.setId(new Long(01));
    testTask.setTitle("Test Task");
    Point p = gf.createPoint(new Coordinate(x, y));
    p.setSRID(4326);
    testTask.setLocation(p);
    taskRepository.save(testTask);

    ObjectMapper objectMapper = new ObjectMapper();
    String geoJson = objectMapper.writeValueAsString(testTask); // geojson is a String

    GeoJSONReader reader = new GeoJSONReader();
    org.wololo.geojson.Geometry geometry = reader.read(geoJson); // type error

    // create and serialize a FeatureCollection
    List<Feature> features = new ArrayList<Feature>();
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("Size", 5);
    properties.put("Area", "Auckland");
    features.add(new Feature(geoJson, properties));
    GeoJSONWriter writer = new GeoJSONWriter();
    GeoJson json = writer.write(features);

但这也会导致IDE中出现错误：

---

我的读者和作者方法是错误的。作者从jts.geometry转到wololo.geometry

    GeometryFactory gf = new GeometryFactory();
    Double y = -36.829;
    Double x = 174.896;

    Task testTask = new Task();
    testTask.setId(new Long(01));
    testTask.setTitle("Test Task");
    Point p = gf.createPoint(new Coordinate(x, y));
    p.setSRID(4326);
    testTask.setLocation(p);
    taskRepository.save(testTask);

    ObjectMapper objectMapper = new ObjectMapper();
    String geoJson = objectMapper.writeValueAsString(testTask);

    System.out.println(geoJson);

    GeoJSONWriter writer = new GeoJSONWriter();
    org.wololo.geojson.Geometry geom = writer.write(p);

    // create and serialize a FeatureCollection
    List<Feature> features = new ArrayList<Feature>();
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("Size", 5);
    properties.put("Area", "Auckland");
    features.add(new Feature(geom, properties));
    GeoJSONWriter writer1 = new GeoJSONWriter();
    FeatureCollection json = writer1.write(features);

GeometryFactory gf=新的GeometryFactory（）；
双y=-36.829；
双x=174.896；
Task testTask=新任务（）；
setId（newlong（01））；
setTitle（“测试任务”）；
点p=gf.createPoint（新坐标（x，y））；
p、 setSRID（4326）；
testTask.setLocation（p）；
taskRepository.save（testTask）；
ObjectMapper ObjectMapper=新的ObjectMapper（）；
字符串geoJson=objectMapper.writeValueAsString（testTask）；
System.out.println（geoJson）；
GeoJSONWriter=新的GeoJSONWriter（）；
org.wololo.geojson.Geometry geom=writer.write（p）；
//创建并序列化FeatureCollection
列表功能=新建ArrayList（）；
映射属性=新的HashMap（）；
属性。放置（“大小”，5）；
出售（“区域”、“奥克兰”）；
添加（新功能（几何、属性））；
GeoJSONWriter writer1=新的GeoJSONWriter（）；
FeatureCollection json=writer1.write（功能）；

writer方法将我的点p转换为org.wololo.geojson.geometry对象，然后我可以将该对象添加到Features或FeaturesCollection

    GeometryFactory gf = new GeometryFactory();
    Double y = -36.829;
    Double x = 174.896;

    Task testTask = new Task();
    testTask.setId(new Long(01));
    testTask.setTitle("Test Task");
    Point p = gf.createPoint(new Coordinate(x, y));
    p.setSRID(4326);
    testTask.setLocation(p);
    taskRepository.save(testTask);

    ObjectMapper objectMapper = new ObjectMapper();
    String geoJson = objectMapper.writeValueAsString(testTask);

    System.out.println(geoJson);

    GeoJSONWriter writer = new GeoJSONWriter();
    org.wololo.geojson.Geometry geom = writer.write(p);

    // create and serialize a FeatureCollection
    List<Feature> features = new ArrayList<Feature>();
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("Size", 5);
    properties.put("Area", "Auckland");
    features.add(new Feature(geom, properties));
    GeoJSONWriter writer1 = new GeoJSONWriter();
    FeatureCollection json = writer1.write(features);