add method for DateUtil

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

@@ -665,13 +665,11 @@ public class DateUtilTest {
 		String strDate = "2019-12-01 17:02:30";
 		LocalDateTime ldt = DateUtil.parseLocalDateTime(strDate);
 		String strDate1 = DateUtil.formatLocalDateTime(ldt);
-		System.out.println(strDate1);
 		Assert.assertEquals(strDate, strDate1);
 		
-		strDate = "2019年12月01日 17:02:30.111";
-		ldt = DateUtil.parseLocalDateTime(strDate, DatePattern.NORM_DATETIME_MS_PATTERN);
-		strDate1 = DateUtil.format(ldt, DatePattern.NORM_DATETIME_MS_PATTERN);
-		System.out.println(strDate1);
+		String strDate2 = "2019年12月01日 17:02:30.111";
+		ldt = DateUtil.parseLocalDateTime(strDate2, DatePattern.NORM_DATETIME_MS_PATTERN);
+		strDate1 = DateUtil.format(ldt, DatePattern.NORM_DATETIME_PATTERN);
 		Assert.assertEquals(strDate, strDate1);
 	}
 }