update deprecated

ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java

@@ -423,7 +423,7 @@ public class ExcelUtil<T>
                     Object val = this.getCellValue(row, entry.getKey());
 
                     // 如果不存在实例则新建.
-                    entity = (entity == null ? clazz.newInstance() : entity);
+                    entity = (entity == null ? clazz.getDeclaredConstructor().newInstance() : entity);
                     // 从map中得到对应列的field.
                     Field field = (Field) entry.getValue()[0];
                     Excel attr = (Excel) entry.getValue()[1];
@@ -1438,7 +1438,7 @@ public class ExcelUtil<T>
     {
         try
         {
-            Object instance = excel.handler().newInstance();
+            Object instance = excel.handler().getDeclaredConstructor().newInstance();
             Method formatMethod = excel.handler().getMethod("format", new Class[] { Object.class, String[].class, Cell.class, Workbook.class });
             value = formatMethod.invoke(instance, value, excel.args(), cell, this.wb);
         }