增加美甲师认证审核逻辑

修改了管理员修改美甲师信息时空字符串会覆盖原来信息的问题

project/jiaqingjiayi/src/main/java/com/cj/jiaqingjiayi/utils/BeanCopyUtils.java

@@ -0,0 +1,36 @@
+package com.cj.jiaqingjiayi.utils;
+
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.BeanWrapper;
+import org.springframework.beans.BeanWrapperImpl;
+
+import java.beans.PropertyDescriptor;
+import java.util.HashSet;
+import java.util.Set;
+
+public class BeanCopyUtils {
+
+    /**
+     * 拷贝属性，跳过 null 和空字符串
+     */
+    public static void copyPropertiesIgnoreEmpty(Object source, Object target) {
+        BeanUtils.copyProperties(source, target, getNullOrEmptyPropertyNames(source));
+    }
+
+    /**
+     * 获取属性值为 null 或空字符串的属性名
+     */
+    private static String[] getNullOrEmptyPropertyNames(Object source) {
+        final BeanWrapper src = new BeanWrapperImpl(source);
+        PropertyDescriptor[] pds = src.getPropertyDescriptors();
+
+        Set<String> emptyNames = new HashSet<>();
+        for (PropertyDescriptor pd : pds) {
+            Object value = src.getPropertyValue(pd.getName());
+            if (value == null || "".equals(value)) {
+                emptyNames.add(pd.getName());
+            }
+        }
+        return emptyNames.toArray(new String[0]);
+    }
+}