12.shpfile读取数据之java-gadl_java 读取 shp文件-优快云博客

本文链接：https://blog.youkuaiyun.com/yaojindou0/article/details/132297987

本文介绍了如何使用Java的GDAL库来处理.shp文件，包括打开数据源、获取图层信息、字段定义和遍历要素等操作。

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基于java gadl库读取shp文件

话不多说，先上代码


import org.gdal.ogr.DataSource;
import org.gdal.ogr.Driver;
import org.gdal.ogr.Feature;
import org.gdal.ogr.FieldDefn;
import org.gdal.ogr.Layer;
import org.gdal.ogr.ogr;
public class ShpReader {
    public static void main(String[] args) {
        // 注册GDAL库
        ogr.RegisterAll();
        // 打开数据源
        DataSource dataSource = ogr.Open("D:\\gisdata\\geospark\\city.shp");
        // 获取图层数量
        int layerCount = dataSource.GetLayerCount();
        System.out.println("Layer count: " + layerCount);
        // 获取第一个图层
        Layer layer = dataSource.GetLayer(0);
        // 获取要素数量
        int featureCount = layer.GetFeatureCount();
        System.out.println("Feature count: " + featureCount);
        // 获取字段信息
        int fieldCount = layer.GetLayerDefn().GetFieldCount();
        for (int i = 0; i < fieldCount; i++) {
            FieldDefn fieldDefn = layer.GetLayerDefn().GetFieldDefn(i);
            System.out.println("Field name: " + fieldDefn.GetName());
            System.out.println("Field type: " + fieldDefn.GetFieldTypeName(fieldDefn.GetFieldType()));
            System.out.println("Field width: " + fieldDefn.GetWidth());
            System.out.println("Field precision: " + fieldDefn.GetPrecision());
        }
        // 遍历要素
        Feature feature = null;
        while ((feature = layer.GetNextFeature()) != null) {
            System.out.println("Feature ID: " + feature.GetFID());
            System.out.println("Geometry type: " + feature.GetGeometryRef().GetGeometryName());
            System.out.println("Geometry coordinates: " + feature.GetGeometryRef().ExportToWkt());
            for (int i = 0; i < fieldCount; i++) {
                FieldDefn fieldDefn = layer.GetLayerDefn().GetFieldDefn(i);
                System.out.println(fieldDefn.GetName() + ": " + feature.GetFieldAsString(i));
            }
            feature.delete();
        }
        // 释放资源
        dataSource.delete();
    }
}