fix: 修改图片为空的空指针异常

open-anpr-server/src/main/java/com/visual/open/anpr/server/controller/server/impl/PlateControllerImpl.java

@@ -18,6 +18,11 @@ public class PlateControllerImpl extends BaseController implements PlateControll
 
     @Override
     public ResponseInfo<List<PlateInfoRepVo>> recognition(PlateInfoReqVo plateInfoReq) {
+
+        String image = plateInfoReq.getImage();
+        if (image == null || image.isEmpty()) {
+            return ResponseBuilder.exception("image cannot be empty", null);
+        }
         try {
             return ResponseBuilder.success(plateService.recognition(plateInfoReq));
         }catch (Exception e){

open-anpr-server/src/main/java/com/visual/open/anpr/server/controller/server/restful/PlateController.java

@@ -34,11 +34,12 @@ public class PlateController extends PlateControllerImpl {
     @ApiOperation(value = "根据图片名称车牌识别")
     @RequestMapping(value = "getByImageName", method = RequestMethod.GET)
     public ResponseInfo<List<PlateInfoRepVo>> imagesToBase64(@RequestParam String imageName){
-        String property = System.getProperty("user.dir") + "\\images\\";
+        String property = System.getProperty("user.dir") ;
         String filePath = property + targetPath + imageName;
         String imageBaseCode = ImageUtil.convertImageToBase64Str(filePath);
         PlateInfoReqVo plateInfoReq = new PlateInfoReqVo();
         plateInfoReq.setImage(imageBaseCode);
+
         return recognition(plateInfoReq);
     }
 
@@ -46,7 +47,7 @@ public class PlateController extends PlateControllerImpl {
 
     /**
      * 抓拍实况中的车牌并识别 （可同时识别，默认最多5张车牌）
-     * @param CameraIP   ffmpeg所需的摄像头IP地址
+     * @param CameraIP   ffmpeg所需要的输入流
      * @return           返回识别结果
      */
     @ApiOperation(value = "抓拍实况中的车牌并识别")
@@ -55,6 +56,9 @@ public class PlateController extends PlateControllerImpl {
         // 获取当前项目路径
         String property = System.getProperty("user.dir");
         String imageName = FfmpegUtil.getLiveCapture(CameraIP, property + targetPath);
+        if ("error".equals(imageName)){
+            return ResponseInfo.error("抓拍失败");
+        }
         return imagesToBase64(imageName);
     }
 

open-anpr-server/src/main/java/com/visual/open/anpr/server/domain/common/ResponseInfo.java

@@ -28,6 +28,14 @@ public class ResponseInfo<T> implements Serializable{
         this.data = data;
     }
 
+    public static <T> ResponseInfo<T> success(T data){
+        return new ResponseInfo<T>(200, "success", data);
+    }
+
+    public static <T> ResponseInfo<T> error(String message){
+        return new ResponseInfo<T>(500, message, null);
+    }
+
     public Integer getCode() {
         return code;
     }

open-anpr-server/src/main/java/com/visual/open/anpr/server/utils/FfmpegUtil.java

@@ -197,11 +197,17 @@ public class FfmpegUtil {
         blockFfmpeg(br);
       }
     } catch (IOException e) {
-      formattedDate = "获取实况抓拍图片失败";
-      System.out.println(formattedDate);
-      e.printStackTrace();
-      return formattedDate;
-    } return formattedDate;
+      System.out.println("获取实况抓拍图片失败");
+      return "error";
+    }
+    File file = new File(targetPath + formattedDate);
+    boolean exists = file.exists();
+
+    if (!exists) {
+      return "error";
+    }
+
+    return formattedDate;
   }
 
   /**