fix parse bug

CHANGELOG.md

@@ -13,6 +13,7 @@
 ### 🐞Bug修复
 * 【core   】     修复CollUtil.isEqualList两个null返回错误问题（issue#1885@Github）
 * 【poi    】     修复ExcelWriter多余调试信息导致的问题（issue#1884@Github）
+* 【poi    】     修复TemporalAccessorUtil.toInstant使用DateTimeFormatter导致问题（issue#1891@Github）
 
 -------------------------------------------------------------------------------------------------------------
 

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

@@ -167,7 +167,7 @@ public class DateTime extends Date {
 	 * @since 5.0.5
 	 */
 	public DateTime(Instant instant, ZoneId zoneId) {
-		this(instant.toEpochMilli(), TimeZone.getTimeZone(ObjectUtil.defaultIfNull(zoneId, ZoneId.systemDefault())));
+		this(instant.toEpochMilli(), ZoneUtil.toTimeZone(zoneId));
 	}
 
 	/**
@@ -177,7 +177,7 @@ public class DateTime extends Date {
 	 * @since 5.0.0
 	 */
 	public DateTime(TemporalAccessor temporalAccessor) {
-		this(DateUtil.toInstant(temporalAccessor));
+		this(TemporalAccessorUtil.toInstant(temporalAccessor));
 	}
 
 	/**
@@ -276,7 +276,7 @@ public class DateTime extends Date {
 	 * @since 5.0.0
 	 */
 	public DateTime(CharSequence dateStr, DateTimeFormatter formatter) {
-		this(Instant.from(formatter.parse(dateStr)), formatter.getZone());
+		this(TemporalAccessorUtil.toInstant(formatter.parse(dateStr)), formatter.getZone());
 	}
 
 	/**

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

@@ -138,7 +138,10 @@ public class TemporalAccessorUtil extends TemporalUtil{
 			// 指定本地时间转换 为Instant，取当天日期
 			result = ((OffsetTime) temporalAccessor).atDate(LocalDate.now()).toInstant();
 		} else {
-			result = Instant.from(temporalAccessor);
+			// issue#1891@Github
+			// Instant.from不能完成日期转换
+			//result = Instant.from(temporalAccessor);
+			result = toInstant(LocalDateTimeUtil.of(temporalAccessor));
 		}
 
 		return result;

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

@@ -0,0 +1,41 @@
+package cn.hutool.core.date;
+
+import java.time.ZoneId;
+import java.util.TimeZone;
+
+/**
+ * {@link ZoneId}和{@link TimeZone}相关封装
+ *
+ * @author looly
+ * @since 5.7.15
+ */
+public class ZoneUtil {
+
+	/**
+	 * {@link ZoneId}转换为{@link TimeZone}，{@code null}则返回系统默认值
+	 *
+	 * @param zoneId {@link ZoneId}，{@code null}则返回系统默认值
+	 * @return {@link TimeZone}
+	 */
+	public static TimeZone toTimeZone(ZoneId zoneId) {
+		if (null == zoneId) {
+			return TimeZone.getDefault();
+		}
+
+		return TimeZone.getTimeZone(zoneId);
+	}
+
+	/**
+	 * {@link TimeZone}转换为{@link ZoneId}，{@code null}则返回系统默认值
+	 *
+	 * @param timeZone {@link TimeZone}，{@code null}则返回系统默认值
+	 * @return {@link ZoneId}
+	 */
+	public static ZoneId toZoneId(TimeZone timeZone) {
+		if (null == timeZone) {
+			return ZoneId.systemDefault();
+		}
+
+		return timeZone.toZoneId();
+	}
+}

hutool-core/src/test/java/cn/hutool/core/date/DateUtilTest.java

@@ -989,4 +989,10 @@ public class DateUtilTest {
 		Assert.assertNotNull(parse);
 		Assert.assertEquals("2021-01-01 00:00:00", parse.toString());
 	}
+
+	@Test
+	public void parseByDateTimeFormatterTest(){
+		final DateTime parse = DateUtil.parse("2021-12-01", DatePattern.NORM_DATE_FORMATTER);
+		Assert.assertEquals("2021-12-01 00:00:00", parse.toString());
+	}
 }