使用预定义的常量，避免实例化对象

ruoyi-admin/src/main/java/com/ruoyi/web/controller/monitor/SysOperlogController.java

@@ -1,13 +1,6 @@
 package com.ruoyi.web.controller.monitor;
 
-import com.ruoyi.common.annotation.Log;
-import com.ruoyi.common.core.controller.BaseController;
-import com.ruoyi.common.core.domain.AjaxResult;
-import com.ruoyi.common.core.page.TableDataInfo;
-import com.ruoyi.common.enums.BusinessType;
-import com.ruoyi.common.utils.poi.ExcelUtil;
-import com.ruoyi.system.domain.SysOperLog;
-import com.ruoyi.system.service.ISysOperLogService;
+import java.util.List;
 import org.apache.shiro.authz.annotation.RequiresPermissions;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
@@ -17,8 +10,14 @@ import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
-
-import java.util.List;
+import com.ruoyi.common.annotation.Log;
+import com.ruoyi.common.core.controller.BaseController;
+import com.ruoyi.common.core.domain.AjaxResult;
+import com.ruoyi.common.core.page.TableDataInfo;
+import com.ruoyi.common.enums.BusinessType;
+import com.ruoyi.common.utils.poi.ExcelUtil;
+import com.ruoyi.system.domain.SysOperLog;
+import com.ruoyi.system.service.ISysOperLogService;
 
 /**
  * 操作日志记录

ruoyi-common/src/main/java/com/ruoyi/common/utils/Arith.java

@@ -108,7 +108,7 @@ public class Arith
                     "The scale must be a positive integer or zero");
         }
         BigDecimal b = new BigDecimal(Double.toString(v));
-        BigDecimal one = new BigDecimal("1");
+        BigDecimal one = BigDecimal.ONE;
         return b.divide(one, scale, RoundingMode.HALF_UP).doubleValue();
     }
 }