讀取

public static void readVectorFile() {
        String strVectorFile = "D:\\Java\\Projects\\dx\\poly.shp";
        //注冊所有的驅(qū)動
        ogr.RegisterAll();
        //支持中文路徑名
        gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");
        //屬性表字段支持中文
        gdal.SetConfigOption("SHAPE_ENCODING", "");

        //打開數(shù)據(jù)
        DataSource ds = ogr.Open(strVectorFile, 0);
        if (null == ds) {
            System.out.println("Open [" + strVectorFile + "] failed!");
            return;
        }
        System.out.println("Open [" + strVectorFile + "] success!");

        //獲取該數(shù)據(jù)源中的圖層數(shù)（一般shp數(shù)據(jù)的圖層只有一個赃泡，mdb粟害、dxf等圖層會有多個）
        int layerCount = ds.GetLayerCount();

        //獲取第一個圖層
        Layer layer = ds.GetLayerByIndex(0);
        if (null == layer) {
            System.out.println("獲取第0個圖層失敗潦俺！");
            return;
        }

        //對圖層進行初始化（如果對圖層進行了過濾操作曼玩，執(zhí)行此句后僧凰，之前過濾全部清空）
        layer.ResetReading();
        //通過屬性表的SQL語句對圖層中的要素進行篩選
//        layer.SetAttributeFilter("")
        //通過指定的幾何對象對圖層中的要素進行篩選
//        layer.SetSpatialFilter();
        //通過指定的四至范圍對圖層中的要素進行篩選
//        layer.SetSpatialFilterRect();

        //獲取圖層中的屬性表表頭并輸出
        System.out.println("屬性表結(jié)構(gòu)信息：");
        FeatureDefn defn = layer.GetLayerDefn();

        //獲取字段數(shù)量
        int field = defn.GetFieldCount();
        for (int attr = 0; attr < field; attr++) {
            FieldDefn fieldDefn = defn.GetFieldDefn(attr);
            System.out.println(fieldDefn.GetNameRef() + ": " +
                    fieldDefn.GetFieldTypeName(fieldDefn.GetFieldType()) + "(" + fieldDefn.GetWidth() + "." + fieldDefn.GetPrecision() + ")");
        }
        //輸出圖層中的要素個數(shù)
        System.out.println("要素個數(shù)：" + layer.GetFeatureCount(0));

        Feature feature = null;
        //獲取要素中的屬性表內(nèi)容
        while ((feature = layer.GetNextFeature()) != null) {
            for (int i = 0; i < field; i++) {
                FieldDefn fieldDefn = defn.GetFieldDefn(i);
                int type = fieldDefn.GetFieldType();
                switch (type) {
                    case ogr.OFTString:
                        System.out.println(feature.GetFieldAsString(i) + "\t");
                        break;
                    case ogr.OFTReal:
                        System.out.println(feature.GetFieldAsDouble(i) + "\t");
                        break;
                    case ogr.OFTInteger:
                        System.out.println(feature.GetFieldAsInteger(i) + "\t");
                        break;
                    default:
                        System.out.println(feature.GetFieldAsString(i) + "\t");
                        break;
                }
            }

            //獲取要素中的幾何體
            Geometry geometry = feature.GetGeometryRef();
            break;
        }
        System.out.println("數(shù)據(jù)集關(guān)閉！");
    }

輸出：

Open [D:\Java\Projects\dx\poly.shp] success!
屬性表結(jié)構(gòu)信息：
AREA: Real(12.3)
EAS_ID: Integer64(11.0)
PRFEDEA: String(16.0)
要素個數(shù)：10
215229.266  
168 
35043411    
數(shù)據(jù)集關(guān)閉继效！

寫入

示例（創(chuàng)建ESRI的SHP文件）

捋了下大致流程：

• 設(shè)置文件類型 > 創(chuàng)建數(shù)據(jù)源 > 創(chuàng)建圖層 > 創(chuàng)建要素 > 在圖層上創(chuàng)建屬性表（各個字段） > 獲取添加屬性表的圖層的要素定義 > 依照該要素定義生成新的要素 > 設(shè)置要素對象的參數(shù)值 > 在圖層上創(chuàng)建該要素

/**
     * 寫入矢量
     *
     * @param strVectorFile
     */
    public static void writeVectorFile(String strVectorFile) {
        //注冊所有的驅(qū)動
        ogr.RegisterAll();
        //支持中文路徑
        gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");
        //屬性表支持中文
        gdal.SetConfigOption("SHAPE_ENCODING", "CP936");

        String strDriverName = "ESRI Shapefile";
        //指定驅(qū)動
        Driver driver = ogr.GetDriverByName(strDriverName);
        if (null == driver) {
            System.out.println(strDriverName + " 驅(qū)動不可用症杏！");
            return;
        }

        //創(chuàng)建數(shù)據(jù)源
        DataSource dataSource = driver.CreateDataSource(strVectorFile, null);
        if (null == dataSource) {
            System.out.println("創(chuàng)建矢量文件【" + strVectorFile + "】失敗瑞信！");
            return;
        }

        //創(chuàng)建圖層厉颤，創(chuàng)建一個多邊形圖層（此處未指定空間參考，如需要需在這里進行指定）
        Layer layer = dataSource.CreateLayer("TestPolygon", null, ogr.wkbPolygon, null);
        //指定空間參考的話長這個樣子（以WGS84示例）：
//        SpatialReference spatialReference=new SpatialReference("");
//        spatialReference.SetWellKnownGeogCS("WGS84");  
//        Layer layer = dataSource.CreateLayer("TestPolygon", spatialReference, ogr.wkbPolygon, null);
        if (null == layer) {
            System.out.println("圖層【" + layer + "】創(chuàng)建失敺布颉逼友！");
            return;
        }

        //創(chuàng)建屬性表
        //創(chuàng)建第一個字段（整型）
        FieldDefn fieldIDDefn = new FieldDefn("FieldID", ogr.OFTInteger);
        layer.CreateField(fieldIDDefn, 1);

        //創(chuàng)建第二個字段（字符，長度50）
        FieldDefn fieldNameDefn = new FieldDefn("FieldName", ogr.OFTString);
        fieldNameDefn.SetWidth(100);
        layer.CreateField(fieldNameDefn, 1);

        //創(chuàng)建第三個字段（字符）
        FieldDefn fieldDefnArea = new FieldDefn("FieldArea", ogr.OFTString);
        fieldDefnArea.SetWidth(50);
        layer.CreateField(fieldDefnArea);

        FeatureDefn featureDefn = layer.GetLayerDefn();

        //創(chuàng)建要素：三角形
        Feature featureTriangle = new Feature(featureDefn);//個人覺得有點Bean工廠跟BeanDefinition的感覺
        featureTriangle.SetField(0, 0);
        featureTriangle.SetField(1, "三角形");
        Geometry geomTriangle = Geometry.CreateFromWkt("POLYGON ((0 0,35 0,10 15,0 0))");
        featureTriangle.SetGeometry(geomTriangle);
        featureTriangle.SetField(2, geomTriangle.Area());
        layer.CreateFeature(featureTriangle);

        //創(chuàng)建要素：矩形
        Feature featureRectangle = new Feature(featureDefn);
        featureRectangle.SetField(0, 1);
        featureRectangle.SetField(1, "矩形");
        Geometry geomRectangle = Geometry.CreateFromWkt("POLYGON ((30 0,60 0,60 30,30 30,30 0))");
        featureRectangle.SetGeometry(geomRectangle);
        featureRectangle.SetField(2, geomRectangle.Area());
        layer.CreateFeature(featureRectangle);

        //創(chuàng)建要素：相交部分
        Feature featureIntersection = new Feature(featureDefn);
        featureIntersection.SetField(0, 2);
        featureIntersection.SetField(1, "intersection");
        Geometry intersection = geomTriangle.Intersection(geomRectangle);
        featureIntersection.SetGeometry(intersection);
        featureIntersection.SetField(2, intersection.GetArea());
        layer.CreateFeature(featureIntersection);

        System.out.println("Finish!");
    }

生成的.shp文件

image.png

刪除

/**
     * 矢量數(shù)據(jù)管理：刪除
     *
     * @param strVerctorFile
     */
    public static void vectorDelete(String strVerctorFile) {
        // TODO: 2021/8/2 生成的三個文件 shp shx dbf只能刪除 shx
        try {
            //注冊所有的驅(qū)動
            ogr.RegisterAll();
            File file = new File(strVerctorFile);
            Driver driver = null;
            {
                //打開矢量
                DataSource dataSource = ogr.Open(strVerctorFile, 0);
                if (null == dataSource) {
                    file.delete();
                    System.out.println("null == dataSource");
                    return;
                }
                driver = dataSource.GetDriver();
                if (null == driver) {
                    file.delete();
                    System.out.println("null == driver");
                    return;
                }
            }
            if (driver.DeleteDataSource(strVerctorFile) == ogr.OGRERR_NONE) {
                System.out.println("driver.DeleteDataSource(strVerctorFile) == ogr.OGRERR_NONE");
                file.delete();
                return;
            } else {
                file.delete();
            }
            System.out.println("Finish!");

        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

重命名

額秤涩，貌似就是先復(fù)置舊的給新的帜乞，然后再刪除舊的。筐眷。黎烈。

/**
     * 矢量數(shù)據(jù)管理：重命名
     * 
     * @param strOldName
     * @param strNewName
     */
    static public void vectorRename(String strOldName, String strNewName) {
        //注冊所有驅(qū)動
        ogr.RegisterAll();
        File file = new File(strOldName);
        Driver driver = null;
        {
            //打開矢量
            DataSource dataSource = ogr.Open(strOldName, 0);
            if (null == dataSource) {
                file.renameTo(new File(strNewName));
                return;
            }
            driver = dataSource.GetDriver();
            if (null == driver) {
                file.renameTo(new File(strNewName));
                return;
            }
            DataSource dataSourceNew = driver.CopyDataSource(dataSource, strNewName, null);
            if (null == dataSourceNew) {
                file.renameTo(new File(strNewName));
                return;
            }
        }
        if(driver.DeleteDataSource(strOldName) == ogr.OGRERR_NONE){
            return;
        }else{
            file.renameTo(new File(strNewName));
        }

    }