java.time.format.DateTimeParseException 在 java 17 中，但在 java 11 中没有

问：

我正在将服务从 jdk 11 迁移到 jdk 17。但是我在 java 17 中不断遇到错误：

Exception in thread "main" java.time.format.DateTimeParseException: Text '09/18/2018 10:31:40 PM' could not be parsed at index 0
at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2052)
at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1954)
at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:600)
at Main.convertToEpoch(Main.java:15)
at Main.getOrderTime(Main.java:54)
at Main.lambda$dateTest$0(Main.java:60)
at java.base/java.util.Arrays$ArrayList.forEach(Arrays.java:4204)
at Main.dateTest(Main.java:60)
at Main.main(Main.java:71)

但是，我在 java 11 中没有收到此错误。示例代码如下：

public class Main {
public static Long convertToEpoch(String dateTime, String pattern) {
    System.out.println(ZoneId.systemDefault());
    DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern).withZone(ZoneId.systemDefault());
    return ZonedDateTime.parse(dateTime, dateTimeFormatter).toInstant().toEpochMilli();
}

private static Long getOrderTime(String orderSavedTime) {
    try {
        return convertToEpoch(orderSavedTime, "yyyy-M-d'T'H:m:sXXX");
    } catch (DateTimeParseException e) {
        System.out.println("unable to parse date in yyyy-M-d'T'H:m:sXXX  trying next format ");
    }
    try {
        //one space less
        return convertToEpoch(orderSavedTime, "MMM d yyyy h:m:s a");
    } catch (DateTimeParseException e) {
        System.out.println("unable to parse date in MMM d yyyy h:m:s a trying next format ");
    }

    try {
        return convertToEpoch(orderSavedTime, "M/d/yy h:m:s a");
    } catch (DateTimeParseException e) {
        System.out.println("unable to parse date in M/d/yy h:m:s a trying next format ");
    }
    try {
        return convertToEpoch(orderSavedTime, "M/d/yyyy h:m:s a");
    } catch (DateTimeParseException e) {
        System.out.println("unable to parse date in M/d/yyyy h:m:s a trying next format ");
    }

    try {
        return convertToEpoch(orderSavedTime, "yyyy-M-d H:m:s");
    } catch (DateTimeParseException e) {
        System.out.println("unable to parse date in yyyy-M-d H:m:s trying next format ");
    }

    try {
        return convertToEpoch(orderSavedTime, "MMM  d yyyy h:m:s:SSSa");
    } catch (DateTimeParseException e) {
        System.out.println("unable to parse date in yyyy-M-d H:m:s trying next format ");
    }

    return convertToEpoch(orderSavedTime, "MMM d yyyy h:m:s:SSSa");
}

public static void dateTest() {
    List<String> formats = Arrays.asList("09/18/2018 10:31:40 PM", "10/18/2018 3:39:24 AM", "9/18/2018 10:31:40 PM", "9/18/2018 3:39:24 PM", "9/18/2018 2:43:08 PM",
            "9/18/2018 5:09:05 PM", "09/09/2018 06:32:29 PM", "09/09/18 06:32:29 PM", "08/09/18 06:02:20 PM", "8/9/18 6:2:2 PM", "Nov  1 2018 12:00:00:000AM");
    formats.forEach(v -> System.out.println(v + " -> " + new Date(getOrderTime(v))));
    System.out.println("new form");
    formats = Arrays.asList("Sep 22 2014 10:33:55:555AM", "Sep 02 2014 2:3:5:555AM", "Sep 2 2014 2:3:05 AM", "Oct 12 2004 02:3:50 PM", "2018-09-08T00:00:00+05:30",
            "Nov  1 2018 12:00:00:000AM");
    formats.forEach(v -> System.out.println(
            v + " -> " + ZonedDateTime.ofInstant(Instant.ofEpochMilli(getOrderTime(v)), ZoneId.systemDefault()).format(DateTimeFormatter.ofPattern("MMM d yyyy h:m:s:SSSa"))));
    formats.forEach(v -> System.out.println(v + " -> " + ZonedDateTime.ofInstant(Instant.ofEpochMilli(getOrderTime(v)), ZoneId.systemDefault())));

}

public static void main(String[] args) {
    dateTest();
    }
}

java11 中的相同示例代码正常运行： 部分输出（用于第一个元素）

Asia/Kolkata
unable to parse date in yyyy-M-d'T'H:m:sXXX  trying next format 
Asia/Kolkata
unable to parse date in MMM d yyyy h:m:s a trying next format 
Asia/Kolkata
unable to parse date in M/d/yy h:m:s a trying next format 
Asia/Kolkata
09/18/2018 10:31:40 PM -> Tue Sep 18 22:31:40 IST 2018

它可能与 AM/PM 标记和区分大小写有关，但原始代码是遗留的，我不想做很多更改。