diff --git a/CHANGELOG.md b/CHANGELOG.md
index 316033d7e..9bf418000 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.4.0 (2020-08-01)
+# 5.4.0 (2020-08-04)
 
 ### 新特性
 * 【socket】     对NioServer和NioClient改造（pr#992@Github）
@@ -11,6 +11,7 @@
 * 【core  】     DateUtil增加beginOfWeek重载
 * 【core  】     将有歧义的BeanUtil.mapToBean方法置为过期（使用toBean方法）
 * 【core  】     添加WatchAction（对Watcher的抽象）
+* 【core  】     修改UUID正则，更加严谨（issue#I1Q1IW@Gitee）
 
 ### Bug修复#
 * 【core  】     修复原始类型转换时，转换失败没有抛出异常的问题
diff --git a/hutool-core/src/main/java/cn/hutool/core/lang/PatternPool.java b/hutool-core/src/main/java/cn/hutool/core/lang/PatternPool.java
index 4159f0110..854de2b37 100644
--- a/hutool-core/src/main/java/cn/hutool/core/lang/PatternPool.java
+++ b/hutool-core/src/main/java/cn/hutool/core/lang/PatternPool.java
@@ -83,11 +83,11 @@ public class PatternPool {
 	/**
 	 * UUID
 	 */
-	public final static Pattern UUID = Pattern.compile("^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$");
+	public final static Pattern UUID = Pattern.compile("^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$", Pattern.CASE_INSENSITIVE);
 	/**
 	 * 不带横线的UUID
 	 */
-	public final static Pattern UUID_SIMPLE = Pattern.compile("^[0-9a-z]{32}$");
+	public final static Pattern UUID_SIMPLE = Pattern.compile("^[0-9a-f]{32}$", Pattern.CASE_INSENSITIVE);
 	/**
 	 * MAC地址正则
 	 */
diff --git a/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java b/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java
index cd2f67fd7..a33f51301 100644
--- a/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/lang/ValidatorTest.java
@@ -1,6 +1,7 @@
 package cn.hutool.core.lang;
 
 import cn.hutool.core.exceptions.ValidateException;
+import cn.hutool.core.util.IdUtil;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -142,4 +143,13 @@ public class ValidatorTest {
 		Assert.assertTrue(Validator.isChinese("全都是中文"));
 		Assert.assertFalse(Validator.isChinese("not全都是中文"));
 	}
+
+	@Test
+	public void isUUIDTest(){
+		Assert.assertTrue(Validator.isUUID(IdUtil.randomUUID()));
+		Assert.assertTrue(Validator.isUUID(IdUtil.fastSimpleUUID()));
+
+		Assert.assertTrue(Validator.isUUID(IdUtil.randomUUID().toUpperCase()));
+		Assert.assertTrue(Validator.isUUID(IdUtil.fastSimpleUUID().toUpperCase()));
+	}
 }
diff --git a/hutool-poi/src/main/java/cn/hutool/poi/excel/ExcelBase.java b/hutool-poi/src/main/java/cn/hutool/poi/excel/ExcelBase.java
index bab55d193..b6c12bc3f 100644
--- a/hutool-poi/src/main/java/cn/hutool/poi/excel/ExcelBase.java
+++ b/hutool-poi/src/main/java/cn/hutool/poi/excel/ExcelBase.java
@@ -1,10 +1,10 @@
 package cn.hutool.poi.excel;
 
-import java.io.Closeable;
-import java.util.ArrayList;
-import java.util.List;
-
+import cn.hutool.core.io.IoUtil;
+import cn.hutool.core.lang.Assert;
 import cn.hutool.poi.excel.cell.CellLocation;
+import cn.hutool.poi.excel.cell.CellUtil;
+import cn.hutool.poi.excel.style.StyleUtil;
 import org.apache.poi.ss.usermodel.Cell;
 import org.apache.poi.ss.usermodel.CellStyle;
 import org.apache.poi.ss.usermodel.Row;
@@ -12,10 +12,9 @@ import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.xssf.usermodel.XSSFSheet;
 
-import cn.hutool.core.io.IoUtil;
-import cn.hutool.core.lang.Assert;
-import cn.hutool.poi.excel.cell.CellUtil;
-import cn.hutool.poi.excel.style.StyleUtil;
+import java.io.Closeable;
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * Excel基础类，用于抽象ExcelWriter和ExcelReader中共用部分的对象和方法
@@ -281,11 +280,22 @@ public class ExcelBase<T extends ExcelBase<T>> implements Closeable {
 	 */
 	public CellStyle createCellStyle(int x, int y) {
 		final Cell cell = getOrCreateCell(x, y);
-		final CellStyle cellStyle = this.workbook.createCellStyle();
+			final CellStyle cellStyle = this.workbook.createCellStyle();
 		cell.setCellStyle(cellStyle);
 		return cellStyle;
 	}
 
+	/**
+	 * 创建单元格样式
+	 *
+	 * @return {@link CellStyle}
+	 * @see Workbook#createCellStyle()
+	 * @since 5.4.0
+	 */
+	public CellStyle createCellStyle(){
+		return StyleUtil.createCellStyle(this.workbook);
+	}
+
 	/**
 	 * 获取或创建某一行的样式，返回样式后可以设置样式内容<br>
 	 * 需要注意，此方法返回行样式，设置背景色在单元格设置值后会被覆盖，需要单独设置其单元格的样式。
diff --git a/hutool-poi/src/main/java/cn/hutool/poi/excel/style/StyleUtil.java b/hutool-poi/src/main/java/cn/hutool/poi/excel/style/StyleUtil.java
index 060ce6dbe..880764166 100644
--- a/hutool-poi/src/main/java/cn/hutool/poi/excel/style/StyleUtil.java
+++ b/hutool-poi/src/main/java/cn/hutool/poi/excel/style/StyleUtil.java
@@ -39,7 +39,7 @@ public class StyleUtil {
 	 * @return {@link CellStyle}
 	 */
 	public static CellStyle cloneCellStyle(Workbook workbook, CellStyle cellStyle) {
-		final CellStyle newCellStyle = workbook.createCellStyle();
+		final CellStyle newCellStyle = createCellStyle(workbook);
 		newCellStyle.cloneStyleFrom(cellStyle);
 		return newCellStyle;
 	}
@@ -144,6 +144,21 @@ public class StyleUtil {
 		return font;
 	}
 
+	/**
+	 * 创建单元格样式
+	 *
+	 * @param workbook {@link Workbook} 工作簿
+	 * @return {@link CellStyle}
+	 * @see Workbook#createCellStyle()
+	 * @since 5.4.0
+	 */
+	public static CellStyle createCellStyle(Workbook workbook) {
+		if(null == workbook){
+			return null;
+		}
+		return workbook.createCellStyle();
+	}
+
 	/**
 	 * 创建默认普通单元格样式
 	 * 
@@ -156,7 +171,7 @@ public class StyleUtil {
 	 * @return {@link CellStyle}
 	 */
 	public static CellStyle createDefaultCellStyle(Workbook workbook) {
-		final CellStyle cellStyle = workbook.createCellStyle();
+		final CellStyle cellStyle = createCellStyle(workbook);
 		setAlign(cellStyle, HorizontalAlignment.CENTER, VerticalAlignment.CENTER);
 		setBorder(cellStyle, BorderStyle.THIN, IndexedColors.BLACK);
 		return cellStyle;
@@ -169,7 +184,7 @@ public class StyleUtil {
 	 * @return {@link CellStyle}
 	 */
 	public static CellStyle createHeadCellStyle(Workbook workbook) {
-		final CellStyle cellStyle = workbook.createCellStyle();
+		final CellStyle cellStyle = createCellStyle(workbook);
 		setAlign(cellStyle, HorizontalAlignment.CENTER, VerticalAlignment.CENTER);
 		setBorder(cellStyle, BorderStyle.THIN, IndexedColors.BLACK);
 		setColor(cellStyle, IndexedColors.GREY_25_PERCENT, FillPatternType.SOLID_FOREGROUND);