Get the specified field using reflection recursively

kanban-common/src/main/java/com/uas/kanban/base/BaseDao.java

@@ -172,9 +172,28 @@ public class BaseDao<T extends BaseEntity> {
      * @param k     指定对象
      * @return 指定字段的值
      */
-    private <K> Object getValue(String field, @NotEmpty("k") K k) throws IllegalStateException, NoSuchFieldException {
-        Field declaredField = k.getClass().getDeclaredField(field);
-        return getValue(declaredField, k);
+    private <K> Object getValue(@NotEmpty("field") String field, @NotEmpty("k") K k) throws IllegalStateException, NoSuchFieldException {
+        return getValue(getField(field, k.getClass()), k);
+    }
+
+    /**
+     * 递归获取指定类的指定字段（包括父类的私有字段）
+     *
+     * @param field 指定字段
+     * @param clazz 指定类
+     * @return 指定字段
+     * @throws NoSuchFieldException
+     */
+    private Field getField(@NotEmpty("field") String field, @NotEmpty("clazz") Class<?> clazz) throws NoSuchFieldException {
+        try {
+            return clazz.getDeclaredField(field);
+        } catch (NoSuchFieldException e) {
+            Class<?> superclass = clazz.getSuperclass();
+            if (superclass != null) {
+                return getField(field, superclass);
+            }
+            throw e;
+        }
     }
 
     /**
@@ -258,8 +277,8 @@ public class BaseDao<T extends BaseEntity> {
         String message = e.getMessage();
         int leftIndex = message.indexOf("{");
         int rightIndex = message.indexOf("}");
-        message = message.substring(leftIndex + 5, rightIndex - 2);
-        return "已存在：" + message;
+        message = message.substring(leftIndex + 4, rightIndex - 1);
+        return "已存在：{" + message.replace(":", "") + "}";
     }
 
     /**