可以使用 Joda-Time 解析日期并提取月份。我知道这是可能的一年的一周,但我找不到/如果可以提取一个月的一周。
Is it possible to parse a date and extract the week of month using Joda-Time. I know it is possible to do it for the week of year but I cannot find how/if it is possible to extract the week of month.
示例:2014-06_03其中03是本月的第三周
Example: 2014-06_03 where 03 is the third week of this month
DateTime dt = new DateTime(); String yearMonthWeekOfMonth = dt.toString("<PATTERN for the week of month>");我已经尝试了模式yyyyMMW,但不被接受。
I have tried the pattern "yyyyMMW" but it is not accepted.
推荐答案当前 joda-time 版本不支持星期几,所以你应该使用一些解决方法。 1)例如,您可以使用下一个方法:
Current joda-time version doesn't support week of month, so you should use some workaround. 1) For example, you can use next method:
static DateTimeFormatter FORMATTER = DateTimeFormat.forPattern("yyyy-MM_'%d'"); static String printDate(DateTime date) { final String baseFormat = FORMATTER.print(date); // 2014-06_%d final int weekOfMonth = date.getDayOfMonth() % 7; return String.format(baseFormat, weekOfMonth); }用法:
DateTime dt = new DateTime(); String dateAsString = printDate(dt);2)您可以使用Java 8,因为Java的API支持周月字段。
2) You can use Java 8, because Java's API supports week of month field.
java.time.LocalDateTime date = LocalDateTime.now(); DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM_W"); System.out.println(formatter.format(date));更多推荐
用Joda
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