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    <!-- 处理CAD文件转换 -->
    <dependency>
        <groupId>com.aspose</groupId>
        <artifactId>aspose-cad</artifactId>
        <version>20.10</version>
    </dependency>
    
    <!-- gdal sdk -->
    <dependency>
        <groupId>org.gdal</groupId>
        <artifactId>gdal</artifactId>
        <version>3.4.1</version>
    </dependency>

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    /**
     * 基于gdal实现dwg转GeoJson
     * @param dwgPath dwg文件路径
     * @return geojson
     */
    public static String dwg2GeoJson(String dwgPath) {
        gdal.SetConfigOption("DXF_ENCODING", "UTF-8");
        //将dwg转成dxf，如果源文件为dxf则跳过该步骤
        String dxfPath = CadUtil.dwg2dxf(dwgPath);
        //dxf转geojson
        DataSource ds = ogr.Open(dxfPath, 0);
        Driver driver = ogr.GetDriverByName("GeoJSON");
        String geoPath = dxfPath.replace(".dxf", ".geojson");
        driver.CopyDataSource(ds, geoPath, null).delete();
        ds.delete();

        //读取geojson
        FileReader fileReader = new FileReader(geoPath, "GBK");
        return fileReader.readString();
    }

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    /**
     * 基于gdal实现dwg转GeoJson
     * @param dwgPath dwg文件路径
     * @return shp文件路径
     */
    public static String dwg2GeoJson(String dwgPath) {
        gdal.SetConfigOption("DXF_ENCODING", "UTF-8");
        //将dwg转成dxf，如果源文件为dxf则跳过该步骤
        String dxfPath = CadUtil.dwg2dxf(dwgPath);
        //dxf转geojson
        DataSource ds = ogr.Open(dxfPath, 0);
        Driver driver = ogr.GetDriverByName("ESRI Shapefile");
        String shpPath = dxfPath.replace(".dxf", ".shp");
        driver.CopyDataSource(ds, shpPath, null).delete();
        ds.delete();
        return shpPath;
    }

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import com.aspose.cad.CodePages;
import com.aspose.cad.Image;
import com.aspose.cad.LoadOptions;
import com.aspose.cad.fileformats.cad.CadImage;
import java.io.File;
public class CadUtil {
    /**
     * dwg文件转dxf文件
     * @param dwgPath dwg文件路径
     * @return 转换后的dxf文件路径
     */
    public static String dwg2dxf(String dwgPath) {
        File dwg = new File(dwgPath);
        if (dwg.exists()) {
            if (!dwg.getName().endsWith(".dwg")) {
                System.out.println("文件格式错误");
                return "";
            }
            String outFile = dwg.getAbsolutePath().replace(".dwg", ".dxf");

            LoadOptions loadOptions = new LoadOptions();
            loadOptions.setSpecifiedEncoding(CodePages.SimpChinese);
            CadImage cadImage = (CadImage) Image.load(dwgPath, loadOptions);
            cadImage.save(outFile);
            cadImage.close();
            return outFile;
        } else {
            System.out.println("dwg文件不存在");
            return "";
        }
    }
}