“经纬度问题”

src/main/java/com/youlai/boot/common/handler/PointTypeHandler.java

@@ -44,14 +44,21 @@ public class PointTypeHandler extends BaseTypeHandler<Point> {
     }
 
     private Point toPoint(byte[] bytes) {
-        if (bytes == null) {
+        if (bytes == null || bytes.length <= 4) {
             return null;
         }
         try {
             WKBReader reader = new WKBReader();
-            return (Point) reader.read(bytes);
+            // MySQL 返回的数据前 4 个字节是 SRID (Little Endian 存储的 4326)
+            // 我们需要跳过这 4 个字节才能获取标准的 WKB 内容
+            byte[] wkbBytes = new byte[bytes.length - 4];
+            System.arraycopy(bytes, 4, wkbBytes, 0, wkbBytes.length);
+
+            Point point = (Point) reader.read(wkbBytes);
+            point.setSRID(4326);
+            return point;
         } catch (ParseException e) {
-            throw new RuntimeException("Failed to parse WKB for Point", e);
+            throw new RuntimeException("無法解析 MySQL 空間數據", e);
         }
     }
 }

src/main/java/com/youlai/boot/mini/service/impl/StrayAnimalServiceImpl.java

@@ -319,14 +319,25 @@ public class StrayAnimalServiceImpl extends ServiceImpl<MiniStrayAnimalMapper, M
     }
 
     private void handleLngLat(MiniStrayAnimal entity, Double lng, Double lat) {
+        // 1. 初始化工厂
         GeometryFactory geometryFactory = new GeometryFactory();
-        Point gdPoint = geometryFactory.createPoint(new Coordinate(lat, lng));
+
+        // 2. 高德/腾讯座标 (GCJ02)
+        // JTS 的 X 是经度，Y 是纬度
+        Point gdPoint = geometryFactory.createPoint(new Coordinate(lng, lat));
         gdPoint.setSRID(4326);
+
+        // 3. 转换为 WGS84 座标
         double[] wgs84 = CoordinateTransformUtils.gcj02ToWgs84(lng, lat);
-        Point wgsPoint = geometryFactory.createPoint(new Coordinate(wgs84[1], wgs84[0]));
+        // 假设数组 wgs84[0] 是经度, wgs84[1] 是纬度
+        Point wgsPoint = geometryFactory.createPoint(new Coordinate(wgs84[0], wgs84[1]));
         wgsPoint.setSRID(4326);
+
+        // 4. 赋值给实体
         entity.setGdLocationPoint(gdPoint);
         entity.setWgs84LocationPoint(wgsPoint);
+
+        // 5. GeoHash 计算 (注意：大多数 GeoHash 库的第一个参数是 Latitude)
         entity.setWgs84Geohash(GeoHash.withCharacterPrecision(wgs84[1], wgs84[0], CommonConstants.GEOHASH_LEVEL).toBase32());
     }
 

src/main/resources/mapper/mini/MiniStrayAnimalMapper.xml

@@ -57,11 +57,11 @@
             <if test="address != null">#{address},</if>
 
             <if test="gdLocationPoint != null">
-                ST_GeomFromWKB(#{gdLocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326),
+                ST_GeomFromWKB(#{gdLocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326, 'axis-order=long-lat'),
             </if>
 
             <if test="wgs84LocationPoint != null">
-                ST_GeomFromWKB(#{wgs84LocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326),
+                ST_GeomFromWKB(#{wgs84LocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326, 'axis-order=long-lat'),
             </if>
 
             <if test="wgs84Geohash != null">#{wgs84Geohash},</if>
@@ -100,12 +100,12 @@
 
             <if test="gdLocationPoint != null">
                 gd_location_point =
-                ST_GeomFromWKB(#{gdLocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326),
+                ST_GeomFromWKB(#{gdLocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326, 'axis-order=long-lat'),
             </if>
 
             <if test="wgs84LocationPoint != null">
                 wgs84_location_point =
-                ST_GeomFromWKB(#{wgs84LocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326),
+                ST_GeomFromWKB(#{wgs84LocationPoint, typeHandler=com.youlai.boot.common.handler.PointTypeHandler}, 4326, 'axis-order=long-lat'),
             </if>
 
             <if test="wgs84Geohash != null">wgs84_geohash = #{wgs84Geohash},</if>
@@ -250,8 +250,8 @@
             a.province,
             a.city,
             a.district,
-            ST_X(a.gd_location_point) AS lng,
+            ST_Longitude(a.gd_location_point) AS lng,
-            ST_Y(a.gd_location_point) AS lat,
+            ST_Latitude(a.gd_location_point) AS lat,
             a.address
         FROM
             mini_stray_animal a
@@ -267,8 +267,8 @@
             animal_type,
             color,
             size,
-            ST_X(gd_location_point) AS lng,
+            ST_Longitude(gd_location_point) AS lng,
-            ST_Y(gd_location_point) AS lat
+            ST_Latitude(gd_location_point) AS lat
         FROM
             mini_stray_animal
         WHERE is_deleted = 0