fix bug

hutool-core/src/main/java/cn/hutool/core/convert/NumberChineseFormatter.java

@@ -165,10 +165,6 @@ public class NumberChineseFormatter {
 	public static String formatThousand(int amount, boolean isUseTraditional){
 		Assert.checkBetween(amount, -999, 999, "Number support only: (-999 ~ 999)！");
 
-		// thousandToChinese方法对0不处理，此处直接返回"零"
-		if (amount == 0) {
-			return String.valueOf(DIGITS[0]);
-		}
 		final String chinese = thousandToChinese(amount, isUseTraditional);
 		if(amount < 20 && amount > 10){
 			// "十一"而非"一十一"
@@ -289,6 +285,11 @@ public class NumberChineseFormatter {
 	 * @return 转换后的汉字
 	 */
 	private static String thousandToChinese(int amountPart, boolean isUseTraditional) {
+		if (amountPart == 0) {
+			// issue#I4R92H@Gitee
+			return String.valueOf(DIGITS[0]);
+		}
+
 		int temp = amountPart;
 
 		StringBuilder chineseStr = new StringBuilder();

hutool-core/src/main/java/cn/hutool/core/date/CalendarUtil.java

@@ -555,7 +555,7 @@ public class CalendarUtil {
 		result.append(NumberChineseFormatter.formatThousand(day, false));
 		result.append('日');
 
-		// 时分秒中零不需要替换
+		// 只替换年月日，时分秒中零不需要替换
 		String temp = result.toString().replace('零', '〇');
 		result.delete(0, result.length());
 		result.append(temp);