Java GeoJSON如何转换为其他格式

Java GeoJSON可以转换为其他格式，如Shapefile、KML、GeoRSS等。以下是一种将GeoJSON转换为Shapefile的方法：

1. 首先，您需要使用Java库来读取和处理GeoJSON数据。一个常用的库是GeoTools，它提供了用于处理地理空间数据的各种工具和功能。您可以在Maven中添加以下依赖项来引入GeoTools库：

<dependency>     <groupId>org.geotools</groupId>     <artifactId>gt-main</artifactId>     <version>22.3</version> </dependency> 

2. 接下来，您需要编写Java代码来读取GeoJSON文件并将其转换为FeatureCollection对象。以下是一个示例代码片段：

import org.geotools.feature.FeatureCollection; import org.geotools.geojson.feature.FeatureJSON;  import java.io.File; import java.io.FileInputStream; import java.io.IOException;  public class GeoJSONToShapefileConverter {      public static void main(String[] args) throws IOException {         File geoJSONFile = new File("path/to/geojson/file.geojson");          FileInputStream fis = new FileInputStream(geoJSONFile);         FeatureJSON featureJSON = new FeatureJSON();         FeatureCollection featureCollection = featureJSON.readFeatureCollection(fis);          // Convert FeatureCollection to Shapefile         // TODO: add code to convert FeatureCollection to Shapefile     } } 

3. 最后，您需要编写代码来将FeatureCollection对象转换为Shapefile。您可以使用GeoTools库中的工具来实现这一点。以下是一个示例代码片段：

import org.geotools.data.FileDataStore; import org.geotools.data.FileDataStoreFinder; import org.geotools.data.shapefile.ShapefileDataStore; import org.geotools.feature.FeatureCollection; import org.geotools.feature.FeatureIterator; import org.geotools.geojson.feature.FeatureJSON; import org.opengis.feature.simple.SimpleFeature; import org.opengis.feature.simple.SimpleFeatureType;  import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.util.HashMap; import java.util.Map;  public class GeoJSONToShapefileConverter {      public static void main(String[] args) throws IOException {         File geoJSONFile = new File("path/to/geojson/file.geojson");          FileInputStream fis = new FileInputStream(geoJSONFile);         FeatureJSON featureJSON = new FeatureJSON();         FeatureCollection featureCollection = featureJSON.readFeatureCollection(fis);          File shapefile = new File("path/to/output/shapefile.shp");         Map<String, Object> params = new HashMap<>();         params.put(ShapefileDataStoreFactory.URLP.key, shapefile.toURI().toURL());         ShapefileDataStore dataStore = (ShapefileDataStore) DataStoreFinder.getDataStore(params);          SimpleFeatureType featureType = featureCollection.getSchema();         dataStore.createSchema(featureType);          FeatureIterator<SimpleFeature> iterator = featureCollection.features();         while (iterator.hasNext()) {             SimpleFeature feature = iterator.next();             dataStore.addFeature(feature);         }         iterator.close();     } } 

通过以上步骤，您可以将Java GeoJSON转换为Shapefile格式。您可以根据需要进行调整和修改以适应不同的转换需求。