How to create and populate shp file with GeoTools API

问题

I need to create an empty shape file and populate it with data from my java colletion. Can someone show me an example of how to achieve this? Thanks in advance.

回答1:

For full details please see the CSV to Shapefile tutorial.

Basically you need to define the Shapefiles columns in a SimpleFeatureType object, the easiest way to do this is to use a SimpleFeatureTypeBuilder. Here is generated from directly using a utility method to save time.

    final SimpleFeatureType TYPE = 
        DataUtilities.createType("Location",
            "location:Point:srid=4326," + // <- the geometry attribute: Point type
                    "name:String," + // <- a String attribute
                    "number:Integer" // a number attribute
    );

Now, you can create the Shapefile:

    /*
     * Get an output file name and create the new shapefile
     */
    File newFile = getNewShapeFile(file);

    ShapefileDataStoreFactory dataStoreFactory = new ShapefileDataStoreFactory();

    Map<String, Serializable> params = new HashMap<String, Serializable>();
    params.put("url", newFile.toURI().toURL());
    params.put("create spatial index", Boolean.TRUE);

    ShapefileDataStore newDataStore = (ShapefileDataStore) dataStoreFactory.createNewDataStore(params);
    newDataStore.createSchema(TYPE);

    /*
     * You can comment out this line if you are using the createFeatureType method (at end of
     * class file) rather than DataUtilities.createType
     */
    newDataStore.forceSchemaCRS(DefaultGeographicCRS.WGS84);

And, finally write the collection of Features to it:

    Transaction transaction = new DefaultTransaction("create");

    String typeName = newDataStore.getTypeNames()[0];
    SimpleFeatureSource featureSource = newDataStore.getFeatureSource(typeName);

    if (featureSource instanceof SimpleFeatureStore) {
        SimpleFeatureStore featureStore = (SimpleFeatureStore) featureSource;

        featureStore.setTransaction(transaction);
        try {
            featureStore.addFeatures(collection);
            transaction.commit();

        } catch (Exception problem) {
            problem.printStackTrace();
            transaction.rollback();

        } finally {
            transaction.close();
        }
        System.exit(0); // success!
    } else {
        System.out.println(typeName + " does not support read/write access");
        System.exit(1);
    }

来源：https://stackoverflow.com/questions/50334453/how-to-create-and-populate-shp-file-with-geotools-api

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java

shape

geotools