优化代码

ruoyi-common/src/main/java/com/ruoyi/common/core/page/TableDataInfo.java

@@ -37,7 +37,7 @@ public class TableDataInfo implements Serializable
      * @param list 列表数据
      * @param total 总记录数
      */
-    public TableDataInfo(List<?> list, int total)
+    public TableDataInfo(List<?> list, long total)
     {
         this.rows = list;
         this.total = total;

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

@@ -108,7 +108,6 @@ public class Arith
                     "The scale must be a positive integer or zero");
         }
         BigDecimal b = new BigDecimal(Double.toString(v));
-        BigDecimal one = BigDecimal.ONE;
-        return b.divide(one, scale, RoundingMode.HALF_UP).doubleValue();
+        return b.divide(BigDecimal.ONE, scale, RoundingMode.HALF_UP).doubleValue();
     }
 }

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

@@ -286,6 +286,32 @@ public class StringUtils extends org.apache.commons.lang3.StringUtils
         return str.substring(start, end);
     }
 
+    /**
+     * 在字符串中查找第一个出现的 `open` 和最后一个出现的 `close` 之间的子字符串
+     * 
+     * @param str 要截取的字符串
+     * @param open 起始字符串
+     * @param close 结束字符串
+     * @return 截取结果
+     */
+    public static String substringBetweenLast(final String str, final String open, final String close)
+    {
+        if (isEmpty(str) || isEmpty(open) || isEmpty(close))
+        {
+            return NULLSTR;
+        }
+        final int start = str.indexOf(open);
+        if (start != INDEX_NOT_FOUND)
+        {
+            final int end = str.lastIndexOf(close);
+            if (end != INDEX_NOT_FOUND)
+            {
+                return str.substring(start + open.length(), end);
+            }
+        }
+        return NULLSTR;
+    }
+
     /**
      * 判断是否为空，并且不是空白字符
      * 

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

@@ -1448,8 +1448,7 @@ public class ExcelUtil<T>
      */
     public String encodingFilename(String filename)
     {
-        filename = UUID.randomUUID() + "_" + filename + ".xlsx";
-        return filename;
+        return UUID.randomUUID() + "_" + filename + ".xlsx";
     }
 
     /**