java和geoserver发布geojson格式的矢量切片

您可以使用Java编写一个程序，使用GeoTools库来读取您的矢量数据，并使用GeoJSON格式将其转换为瓦片。然后，您可以使用GeoServer来发布这些瓦片。

下面是一个简单的Java程序，可以将矢量数据转换为GeoJSON格式的瓦片：

import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.store.ContentFeatureCollection;
import org.geotools.factory.CommonFactoryFinder;
import org.geotools.feature.FeatureIterator;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.geotools.geojson.feature.FeatureJSON;
import org.geotools.geometry.jts.JTSFactoryFinder;
import org.geotools.map.FeatureLayer;
import org.geotools.map.MapContent;
import org.geotools.referencing.crs.DefaultGeographicCRS;
import org.geotools.renderer.lite.StreamingRenderer;
import org.geotools.styling.SLD;
import org.geotools.styling.Style;
import org.geotools.styling.StyleFactory;
import org.geotools.styling.Symbolizer;
import org.geotools.styling.TextSymbolizer;
import org.geotools.styling.Font;

import org.locationtech.jts.geom.Envelope;
import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.geom.Point;
import org.locationtech.jts.geom.Polygon;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.filter.FilterFactory2;
import org.opengis.filter.identity.FeatureId;

public class GeoJSONTileGenerator {

    public static void main(String[] args) throws IOException {

        // Open the vector data file
        File file = new File("data.shp");
        Map<String, Object> map = new HashMap<>();
        map.put("url", file.toURI().toURL());

        // Read the data into a feature collection
        ContentFeatureCollection features = new ContentFeatureCollection(map, null);

        // Create a style for the features
        StyleFactory styleFactory = CommonFactoryFinder.getStyleFactory();
        FilterFactory2 filterFactory = CommonFactoryFinder.getFilterFactory2();
        Symbolizer symbolizer = styleFactory.createPolygonSymbolizer();
        Style style = SLD.createPolygonStyle(java.awt.Color.BLUE, java.awt.Color.WHITE, 1.0f);
        TextSymbolizer textSymbolizer = styleFactory.createTextSymbolizer();
        Font font = styleFactory.getDefaultFont();
        textSymbolizer.setFont(font);
        textSymbolizer.setLabel("Name");
        style.featureTypeStyles().get(0).rules().get(0).symbolizers().add(textSymbolizer);

        // Create a feature type for the GeoJSON output
        SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
        builder.setName("MyFeatureType");
        builder.setCRS(DefaultGeographicCRS.WGS84);
        builder.add("geometry", Geometry.class);
        builder.add("Name", String.class);
        SimpleFeatureType featureType = builder.buildFeatureType();

        // Create a GeoJSON feature writer
        FeatureJSON featureJSON = new FeatureJSON();
        featureJSON.setEncodeNullValues(true);

        // Create a map content for the renderer
        MapContent mapContent = new MapContent();
        mapContent.setTitle("My Map");

        // Add the features to the map content and set the style
        SimpleFeatureIterator iterator = features.features();
        while (iterator.hasNext()) {
            SimpleFeature feature = iterator.next();
            FeatureId id = feature.getIdentifier();
            Envelope envelope = feature.getBounds();
            Geometry geometry = (Geometry) feature.getDefaultGeometry();
            SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(featureType);
            featureBuilder.add(geometry);
            featureBuilder.add(feature.getAttribute("Name"));
            SimpleFeature newFeature = featureBuilder.buildFeature(id.toString());
            mapContent.addLayer(new FeatureLayer(newFeature, style));
        }
        iterator.close();

        // Create a renderer for the map content and set the bounding box
        StreamingRenderer renderer = new StreamingRenderer();
        renderer.setMapContent(mapContent);
        renderer.setJava2DHints(new java.util.HashMap<RenderingHints.Key,Object>());

        Envelope bbox = new Envelope(-180, 180, -90, 90);
        double resolution = 0.1;
        int tileSize = 256;

        // Loop through the tiles and write them to GeoJSON files
        for (int x = 0; x < Math.pow(2, 5); x++) {
            for (int y = 0; y < Math.pow(2, 5); y++) {
                Envelope tileEnvelope = new Envelope(x * tileSize * resolution + bbox.getMinX(),
                                                     (x + 1) * tileSize * resolution + bbox.getMinX(),
                                                     y * tileSize * resolution + bbox.getMinY(),
                                                     (y + 1) * tileSize * resolution + bbox.getMinY());
                renderer.setMapContent(mapContent);
                renderer.paint(null, null, tileEnvelope);
                Geometry tileGeometry = JTSFactoryFinder.getGeometryFactory().toGeometry(tileEnvelope);
                SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(featureType);
                featureBuilder.add(tileGeometry);
                featureBuilder.add(null);
                SimpleFeature feature = featureBuilder.buildFeature(null);
                File tileFile = new File("tile_" + x + "_" + y + ".json");
                featureJSON.writeFeature(feature, tileFile);
            }
        }
    }
}

这个程序将矢量数据读取到一个特征集合中，然后为每个特征创建一个图层，并使用GeoTools渲染器将其渲染为一个GeoJSON格式的瓦片。您可以根据需要修改渲染器的参数，例如分辨率和瓦片大小。

然后，您可以使用GeoServer来发布这些瓦片。首先，将它们上传到GeoServer中。然后，创建一个新的数据存储，选择“GeoJSON瓦片”作为存储类型，并选择适当的参数。最后，发布存储并选择适当的样式。