fix float bug

hutool-core/src/main/java/cn/hutool/core/util/NumberUtil.java

@@ -2673,6 +2673,22 @@ public class NumberUtil {
 		return Calculator.conversion(expression);
 	}
 
+	/**
+	 * Number值转换为double<br>
+	 * float强制转换存在精度问题，此方法避免精度丢失
+	 *
+	 * @param value 被转换的float值
+	 * @return double值
+	 * @since 5.7.8
+	 */
+	public static double toDouble(Number value) {
+		if(value instanceof Float){
+			return Double.parseDouble(value.toString());
+		}else{
+			return value.doubleValue();
+		}
+	}
+
 	// ------------------------------------------------------------------------------------------- Private method start
 	private static int mathSubNode(int selectNum, int minNum) {
 		if (selectNum == minNum) {

hutool-poi/src/main/java/cn/hutool/poi/excel/cell/setters/NumberCellSetter.java

@@ -1,5 +1,6 @@
 package cn.hutool.poi.excel.cell.setters;
 
+import cn.hutool.core.util.NumberUtil;
 import cn.hutool.poi.excel.cell.CellSetter;
 import org.apache.poi.ss.usermodel.Cell;
 
@@ -26,10 +27,6 @@ public class NumberCellSetter implements CellSetter {
 	public void setValue(Cell cell) {
 		// issue https://gitee.com/dromara/hutool/issues/I43U9G
 		// 避免float到double的精度问题
-		if (value instanceof Float) {
-			cell.setCellValue(value.floatValue());
-		} else {
-			cell.setCellValue(value.doubleValue());
-		}
+		cell.setCellValue(NumberUtil.toDouble(value));
 	}
 }

hutool-poi/src/test/java/cn/hutool/poi/excel/ExcelWriteTest.java

@@ -721,4 +721,16 @@ public class ExcelWriteTest {
 
 		writer.close();
 	}
+
+	@Test
+	@Ignore
+	public void writeFloatTest(){
+		//issue https://gitee.com/dromara/hutool/issues/I43U9G
+		String path = "d:/test/floatTest.xlsx";
+		FileUtil.del(path);
+
+		final ExcelWriter writer = ExcelUtil.getWriter(path);
+		writer.writeRow(ListUtil.of(22.9f));
+		writer.close();
+	}
 }