From 2d2d9138fbe5c9c43f070be59a2d10f18fbf4c3b Mon Sep 17 00:00:00 2001
From: 13693261870 <252740454@qq.com>
Date: 星期三, 23 十一月 2022 09:05:06 +0800
Subject: [PATCH] 1

---
 src/main/java/com/lf/server/helper/GdbHelper.java |  253 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 248 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/lf/server/helper/GdbHelper.java b/src/main/java/com/lf/server/helper/GdbHelper.java
index bb887ac..48d1d14 100644
--- a/src/main/java/com/lf/server/helper/GdbHelper.java
+++ b/src/main/java/com/lf/server/helper/GdbHelper.java
@@ -2,12 +2,17 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.gdal.ogr.DataSource;
-import org.gdal.ogr.Layer;
-import org.gdal.ogr.ogr;
+import org.gdal.ogr.*;
 
+import java.lang.reflect.Field;
+import java.sql.Timestamp;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.LocalTime;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * GDB甯姪绫�
@@ -16,6 +21,13 @@
 public class GdbHelper {
     private final static Log log = LogFactory.getLog(GdbHelper.class);
 
+    public static List<String> excludeFields = new ArrayList<String>();
+
+    static {
+        excludeFields.add("gid");
+        excludeFields.add("shape_leng");
+    }
+
     /**
      * 鑾峰彇琛ㄥ悕
      */
@@ -23,20 +35,251 @@
         List<String> list = new ArrayList<>();
         try {
             org.gdal.ogr.Driver driver = ogr.GetDriverByName("OpenFileGDB");
-            if (driver == null) {
+            if (null == driver) {
                 return list;
             }
 
             DataSource dataSource = driver.Open(filePath, 0);
+            if (null == dataSource) {
+                return list;
+            }
+
             for (int i = 0, count = dataSource.GetLayerCount(); i < count; i++) {
                 Layer layer = dataSource.GetLayer(i);
-
                 list.add(layer.GetName());
+
+                layer.delete();
             }
+
+            dataSource.delete();
+            driver.delete();
         } catch (Exception ex) {
             log.error(ex.getMessage(), ex);
         }
 
         return list;
     }
+
+    /**
+     * 璇诲彇鏁版嵁
+     */
+    public static <T> List<T> readData(Class clazz, String filePath, String layerName) {
+        List<T> list = new ArrayList<>();
+        try {
+            org.gdal.ogr.Driver driver = ogr.GetDriverByName("OpenFileGDB");
+            if (null == driver) {
+                return list;
+            }
+
+            DataSource dataSource = driver.Open(filePath, 0);
+            if (null == dataSource) {
+                return list;
+            }
+
+            for (int i = 0, count = dataSource.GetLayerCount(); i < count; i++) {
+                Layer layer = dataSource.GetLayer(i);
+
+                if (layer.GetName().equals(layerName)) {
+                    GdbHelper.readLayer(clazz, layer, list);
+                    break;
+                }
+
+                layer.delete();
+            }
+
+            dataSource.delete();
+            driver.delete();
+        } catch (Exception ex) {
+            log.error(ex.getMessage(), ex);
+        }
+
+        return list;
+    }
+
+    /**
+     * 璇诲彇鍥惧眰
+     */
+    public static <T> void readLayer(Class clazz, Layer layer, List<T> list) {
+        try {
+            Field gField = getGeomField(clazz);
+            Map<Integer, Field> map = getFieldMapper(clazz, layer);
+            if (map.size() == 0) {
+                return;
+            }
+            if (1 > layer.GetFeatureCount()) {
+                return;
+            }
+
+            do {
+                Feature f = layer.GetNextFeature();
+                if (null == f) {
+                    break;
+                }
+
+                T t = (T) clazz.newInstance();
+                if (readFeature(t, f, map, gField)) {
+                    list.add(t);
+                }
+            } while (true);
+        } catch (Exception ex) {
+            log.error(ex.getMessage(), ex);
+        } finally {
+            if (null != layer) {
+                layer.delete();
+            }
+        }
+    }
+
+    /**
+     * 鑾峰彇 geom 瀛楁
+     */
+    private static Field getGeomField(Class clazz) {
+        try {
+            Field gField = clazz.getDeclaredField("geom");
+            gField.setAccessible(true);
+
+            return gField;
+        } catch (Exception ex) {
+            return null;
+        }
+    }
+
+    /**
+     * 鑾峰彇瀛楁鏄犲皠
+     */
+    private static <T> Map<Integer, Field> getFieldMapper(Class clazz, Layer layer) {
+        Map<Integer, Field> map = new HashMap<>(3);
+
+        try {
+            FeatureDefn fd = layer.GetLayerDefn();
+            for (int i = 0, count = fd.GetFieldCount(); i < count; i++) {
+                FieldDefn fieldDefn = fd.GetFieldDefn(i);
+                try {
+                    String name = fieldDefn.GetName().toLowerCase();
+                    if (excludeFields.contains(name)){
+                        continue;
+                    }
+
+                    Field field = clazz.getDeclaredField(name);
+                    field.setAccessible(true);
+
+                    map.put(i, field);
+                } catch (Exception e) {
+                    //
+                }
+            }
+        } catch (Exception ex) {
+            //
+        }
+
+        return map;
+    }
+
+    /**
+     * 璇诲彇Feature
+     */
+    private static <T> boolean readFeature(T t, Feature f, Map<Integer, Field> map, Field gField) {
+        try {
+            for (Integer i : map.keySet()) {
+                Field field = map.get(i);
+                setValue(t, f, field, i);
+            }
+
+            if (null != gField) {
+                setGeom(t, f, gField);
+            }
+
+            return true;
+        } catch (Exception ex) {
+            return false;
+        }
+    }
+
+    /**
+     * 璁剧疆鍊�
+     */
+    private static <T> void setValue(T t, Feature f, Field field, Integer i) throws Exception {
+        switch (field.getType().toString()) {
+            case "class java.math.BigDecimal":
+            case "class java.lang.Double":
+            case "double":
+                field.set(t, f.GetFieldAsDouble(i));
+                break;
+            case "class java.lang.Long":
+            case "long":
+                field.set(t, f.GetFieldAsInteger64(i));
+                break;
+            case "class java.lang.Integer":
+            case "int":
+                field.set(t, f.GetFieldAsInteger(i));
+                break;
+            case "class java.sql.Timestamp":
+                field.set(t, getTimestamp(f, i));
+                break;
+            default:
+                field.set(t, f.GetFieldAsString(i));
+                break;
+        }
+    }
+
+    /**
+     * 璁剧疆 geom 瀛楁鍊�
+     * <p>
+     * wkbUnknown = 0,
+     * wkbPoint = 1,
+     * wkbLineString = 2,
+     * wkbPolygon = 3,
+     * wkbMultiPoint = 4,
+     * wkbMultiLineString = 5,
+     * wkbMultiPolygon = 6,
+     * wkbGeometryCollection = 7,
+     * wkbNone = 100,
+     * wkbLinearRing = 101
+     */
+    private static <T> void setGeom(T t, Feature f, Field gField) throws Exception {
+        Geometry geometry = f.GetGeometryRef();
+        if (null != geometry) {
+            String wkt = geometry.ExportToWkt();
+            switch (geometry.GetGeometryType()) {
+                case 2:
+                    wkt = wkt.replace("LINESTRING (", "MULTILINESTRING ((") + ")";
+                    break;
+                case 3:
+                    wkt = wkt.replace("POLYGON (", "MULTIPOLYGON ((") + ")";
+                    break;
+                default:
+                    break;
+            }
+
+            gField.set(t, String.format("ST_GeomFromText('%s')", wkt));
+        }
+    }
+
+    /**
+     * 鑾峰彇 Timestamp
+     */
+    private static Timestamp getTimestamp(Feature f, int index) {
+        int[] pnYear = new int[1];
+        int[] pnMonth = new int[1];
+        int[] pnDay = new int[1];
+        int[] pnHour = new int[1];
+        int[] pnMinute = new int[1];
+        float[] pfSecond = new float[1];
+        int[] pnTzFlag = new int[1];
+
+        f.GetFieldAsDateTime(index, pnYear, pnMonth, pnDay, pnHour, pnMinute, pfSecond, pnTzFlag);
+
+        float fSecond = pfSecond[0];
+        int s = (int) fSecond;
+        int ns = (int) (1000000000 * fSecond - s);
+
+        LocalDateTime localDateTime = LocalDateTime.of(
+                LocalDate.of(pnYear[0], pnMonth[0], pnDay[0]),
+                LocalTime.of(pnHour[0], pnMinute[0], s, ns)
+        );
+
+        Timestamp timestamp = Timestamp.valueOf(localDateTime);
+
+        return timestamp;
+    }
 }

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