如何将CDT格式的时间戳转换为Java中的MM/DD？

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英文:

How to convert Timestamp in CDT Format to MM/DD in Java?

问题

  1. ZonedDateTime ztime = ZonedDateTime.parse("2023-06-05T09:00:01CDT", DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssz"));
  2. return ztime.format(DateTimeFormatter.ofPattern("M/d"));
英文:

I have a timestamp in cdt format as below "2023-06-05T09:00:01CDT", I want to convert this timestamp into MM/DD format in Java.

I have tried below :
The expected output was: 6/5
But was getting parsing error.

  1. ZonedDateTime ztime = ZonedDateTime.parse("2023-06-05T09:00:01CDT");
  2. Date date = Date.from(Instant.from(ztime));
  3. Calendar cal = Calendar.getInstance();
  4. cal.setTime(date);
  5. return (cal.get(Calendar.MONTH) + 1) + "/" + cal.get(Calendar.DATE);

Stack trace:

  1. Exception in thread "main" java.time.format.DateTimeParseException: Text '2023-06-05T09:00:01CDT' could not be parsed at index 19
  2. 	at java.base/java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:2056)
  3. 	at java.base/java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1958)
  4. 	at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:600)
  5. 	at java.base/java.time.ZonedDateTime.parse(ZonedDateTime.java:585)
  6. 	at MyClass.main(MyClass.java:9)

答案1

得分: 4

如果您只想解析包含时区（三个字母）而不是标准区域标识的完整 ZonedDateTime 字符串表示形式，您需要为其准备一个格式化程序。

成功解析该字符串后，获取 "MM/dd" 格式的字符串的最快方法是使用 ZonedDateTime 的 format(DateTimeFormatter) 方法，并定义模式以仅输出年份的月份和日期…

例子代码

  1. public static void main(String[] args) {
  2.     // 示例输入
  3.     DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssz");
  4.     // 准备一个实际可以解析带有时区的字符串的格式化程序
  5.     ZonedDateTime ztime = ZonedDateTime.parse("2023-06-05T09:00:01CDT", dtf);
  6.     // 打印完整的带时区的日期时间
  7.     System.out.println(ztime);
  8.     // 并以仅考虑年份的月份和日期的格式打印结果
  9.     System.out.println(ztime.format(DateTimeFormatter.ofPattern("M/d")));
  10. }

输出

  1. 2023-06-05T09:00:01-05:00[America/Chicago]
  2. 6/5

优点

  • 非常简短的解决方案
  • 仅使用一个API，这是现代的方式…
英文:

If you simply want to parse a full ZonedDateTime String representation that includes a time zone (three letters) instead of a standard zone id, you will have to prepare a formatter for it.

Having successfully parsed that String, the quickest way to get a String of the format "MM/dd" would be to use the method format(DateTimeFormatter) of ZonedDateTime and define the pattern to only output month-of-year and day-of-month…

example code

  1. public static void main(String[] args) {
  2. 	// example input
  3. 	DateTimeFormatter dtf = DateTimeFormatter.ofPattern("uuuu-MM-dd'T'HH:mm:ssz");
  4. 	// prepare a formatter that can actually parse the String with a time zone
  5. 	ZonedDateTime ztime = ZonedDateTime.parse("2023-06-05T09:00:01CDT", dtf);
  6. 	// print the full zoned date time
  7. 	System.out.println(ztime);
  8. 	// and print the result in a format that only considers month of year and day of month
  9. 	System.out.println(ztime.format(DateTimeFormatter.ofPattern("M/d")));
  10. }

Output

  1. 2023-06-05T09:00:01-05:00[America/Chicago]
  2. 6/5

Advantages

  • very short solution
  • uses only one API, the modern one…

答案2

得分: 2

这可能会有所帮助。

  1.         String cdtTimestamp = "2023-06-01T15:30:00-05:00"; // 示例CDT时间戳
  2.         // 解析CDT时间戳为ZonedDateTime
  3.         ZonedDateTime cdtDateTime = ZonedDateTime.parse(cdtTimestamp);
  4.         // 转换为本地时区（可选）
  5.         ZonedDateTime localDateTime = cdtDateTime.withZoneSameInstant(ZoneId.systemDefault());
  6.         // 将日期格式化为MM/DD
  7.         DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("MM/dd");
  8.         String formattedDate = localDateTime.format(dateFormatter);
  9.         System.out.println("格式化后的日期：" + formattedDate);
英文:

This might be helpful.

  1.         String cdtTimestamp = "2023-06-01T15:30:00-05:00"; // Example CDT timestamp
  2.         // Parse CDT timestamp into ZonedDateTime
  3.         ZonedDateTime cdtDateTime = ZonedDateTime.parse(cdtTimestamp);
  4.         // Convert to local timezone (optional)
  5.         ZonedDateTime localDateTime = cdtDateTime.withZoneSameInstant(ZoneId.systemDefault());
  6.         // Format the date as MM/DD
  7.         DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("MM/dd");
  8.         String formattedDate = localDateTime.format(dateFormatter);
  9.         System.out.println("Formatted date: " + formattedDate);

答案3

得分: 1

尝试这段代码片段，如果是解析问题，你可以添加一个DateTimeFormatter :: documentation

  1. DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssz");
  2. ZonedDateTime time = ZonedDateTime.parse("2023-06-05T09:00:01CDT", format);
  3. Date date = Date.from(Instant.from(time));
  4. Calendar cal = Calendar.getInstance();
  5. cal.setTime(date);
  6. String dateStr = (cal.get(Calendar.MONTH) + 1) + "/" + cal.get(Calendar.DATE);
英文:

Try this code snippet, if it is a parsing issue you can add a DateTimeFormatter :: documentation

  1.     DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssz");
  2.     ZonedDateTime time = ZonedDateTime.parse("2023-06-05T09:00:01CDT", format);
  3.     Date date = Date.from(Instant.from(time));
  4.     cal.setTime(date);
  5.     Calendar cal = Calendar.getInstance();
  6.     String date =  (cal.get(Calendar.MONTH) + 1) + "/" + cal.get(Calendar.DATE);

huangapple
  • 本文由 发表于 2023年6月5日 20:55:24
  • 转载请务必保留本文链接：https://go.coder-hub.com/76406631.html
  • datetime-parsing
  • java
  • java-time
  • timestamp
  • zoneddatetime
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