无法将 org.apache.avro.util.Utf8 解析为 java.time.ZonedDateTime

Question

我试过以下测试。但无法解析日期格式：2020-04-19T19:00:54

为什么我会遇到这个问题？

public ZonedDateTime convert(Utf8 date) {
    String datee = ((String) date.toString()).replace("T", " ")
    LocalDateTime today = LocalDateTime.parse(datee, formatter)  
    ZonedDateTime currentISTime = today.atZone(ZoneId.systemDefault())
    ZonedDateTime currentETime = currentISTime.withZoneSameInstant(ZoneId.systemDefault())
    return ZonedDateTime.parse(formatter.format(currentETime), formatter) 
}

String datee = ((String) date.toString()).replace("T", " ")  
try{
    var zoned = ZonedDateTime.from(DateTimeFormatter.ISO_DATE_TIME.parse(datee.toString()))
    return zoned.withZoneSameInstant(ZoneId.systemDefault())
} catch (DateTimeException e) {
    //no time zone information -> parse as LocalDate
    return ZonedDateTime.parse(datee.toString())
}

异常：

    Exception in thread "main" java.time.format.DateTimeParseException: Text '2020-04-19 19:00:54' could not be parsed at index 10 at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2046)
    at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1948)
    at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:598)
    at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:583)

Answer 1

您不需要 DateTimeFormatter 来解析您的日期时间字符串

您不需要 DateTimeFormatter 来解析您的日期时间字符串，因为您的日期时间字符串已经是 ISO 8601 格式。

现代日期时间 API 基于 ISO 8601 并且不需要明确使用 DateTimeFormatter 对象，只要日期时间字符串符合 ISO 8601 标准.

演示：

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class Main {
    public static void main(String[] args) {
        String strDateTime = "2020-04-19T19:00:54";
        LocalDateTime ldt = LocalDateTime.parse(strDateTime);
        System.out.println(ldt);

        // Convert to ZonedDateTime using JVM's timezone
        ZonedDateTime zdtSystem = ldt.atZone(ZoneId.systemDefault());
        System.out.println(zdtSystem);

        // Convert the ZonedDateTime to some other timezone e.g. Asia/Kolkata
        ZonedDateTime zdtIndia = zdtSystem.withZoneSameInstant(ZoneId.of("Asia/Kolkata"));
        System.out.println(zdtIndia);
    }
}

我的系统在 Europe/London 时区的输出：

2020-04-19T19:00:54
2020-04-19T19:00:54+01:00[Europe/London]
2020-04-19T23:30:54+05:30[Asia/Kolkata]

ONLINE DEMO

了解有关 modern Date-Time API^* from Trail: Date Time 的更多信息。

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^{* 无论出于何种原因，如果您必须坚持Java 6 或Java 7，您可以使用ThreeTen-Backport which backports most of the java.time functionality to Java 6 & 7. If you are working for an Android project and your Android API level is still not compliant with Java-8, check Java 8+ APIs available through desugaring and 。}