java wkb字符串转geojson

可以使用开源库 JTS (Java Topology Suite) 来实现 wkb 字符串转 geojson。具体步骤如下：

1. 将 wkb 字符串转为 Geometry 对象：

WKBReader reader = new WKBReader();
Geometry geometry = reader.read(WKBUtils.hexToBytes(wkbString));

2. 将 Geometry 对象转为 GeoJSON 字符串：

GeoJSONWriter writer = new GeoJSONWriter();
String geoJsonString = writer.write(geometry);

完整代码示例：

import org.locationtech.jts.geom.Geometry;
import org.locationtech.jts.io.geojson.GeoJSONWriter;
import org.locationtech.jts.io.WKBReader;
import org.locationtech.jts.io.WKBUtils;

public class WkbToGeoJson {
    public static void main(String[] args) {
        String wkbString = "0101000000000000000000F03F000000000000F03F";
        WKBReader reader = new WKBReader();
        try {
            Geometry geometry = reader.read(WKBUtils.hexToBytes(wkbString));
            GeoJSONWriter writer = new GeoJSONWriter();
            String geoJsonString = writer.write(geometry);
            System.out.println(geoJsonString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}