!1002 添加writeCellValue的重载，以支持isHeader

Merge pull request !1002 from hower/v5-dev

Author: looly

hutool-poi/src/main/java/cn/hutool/poi/excel/ExcelWriter.java

@@ -889,7 +889,7 @@ public ExcelWriter writeImg(File imgFile, int dx1, int dy1, int dx2, int dy2, in
 	public ExcelWriter writeImg(File imgFile, int imgType, int dx1, int dy1, int dx2,
 								int dy2, int col1, int row1, int col2, int row2) {
 		return writeImg(FileUtil.readBytes(imgFile), imgType, dx1,
-			dy1, dx2, dy2, col1, row1, col2, row2);
+				dy1, dx2, dy2, col1, row1, col2, row2);
 	}
 
 	/**
@@ -1097,30 +1097,57 @@ public ExcelWriter writeRow(Iterable<?> rowData) {
 	}
 
 	/**
-	 * 给指定单元格赋值，使用默认单元格样式
+	 * 给指定单元格赋值，使用默认单元格样式，默认不是Header
 	 *
 	 * @param locationRef 单元格地址标识符，例如A11，B5
 	 * @param value       值
 	 * @return this
 	 * @since 5.1.4
 	 */
 	public ExcelWriter writeCellValue(String locationRef, Object value) {
-		final CellLocation cellLocation = ExcelUtil.toLocation(locationRef);
-		return writeCellValue(cellLocation.getX(), cellLocation.getY(), value);
+		return writeCellValue(locationRef, value, false);
 	}
 
 	/**
 	 * 给指定单元格赋值，使用默认单元格样式
 	 *
+	 * @param locationRef 单元格地址标识符，例如A11，B5
+	 * @param value       值
+	 * @param isHeader    是否为Header
+	 * @return this
+	 * @since 5.1.4
+	 */
+	public ExcelWriter writeCellValue(String locationRef, Object value, boolean isHeader) {
+		final CellLocation cellLocation = ExcelUtil.toLocation(locationRef);
+		return writeCellValue(cellLocation.getX(), cellLocation.getY(), value, isHeader);
+	}
+
+	/**
+	 * 给指定单元格赋值，使用默认单元格样式，默认不是Header
+	 *
 	 * @param x     X坐标，从0计数，即列号
 	 * @param y     Y坐标，从0计数，即行号
 	 * @param value 值
 	 * @return this
 	 * @since 4.0.2
 	 */
 	public ExcelWriter writeCellValue(int x, int y, Object value) {
+		return writeCellValue(x, y, value, false);
+	}
+
+	/**
+	 * 给指定单元格赋值，使用默认单元格样式
+	 *
+	 * @param x            X坐标，从0计数，即列号
+	 * @param y            Y坐标，从0计数，即行号
+	 * @param isHeader     是否为Header
+	 * @param value        值
+	 * @return this
+	 * @since 4.0.2
+	 */
+	public ExcelWriter writeCellValue(int x, int y, Object value, boolean isHeader) {
 		final Cell cell = getOrCreateCell(x, y);
-		CellUtil.setCellValue(cell, value, this.styleSet, false);
+		CellUtil.setCellValue(cell, value, this.styleSet, isHeader);
 		return this;
 	}