相当于 java.util.Calendar 的 GWT 日期
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GWT Date equivalent to java.util.Calendar
提问by Babajide Prince
I want to get the date of a particular day of the week e.g Wednessday. i.e If today's date is 27th Friday, Wednessday would infact be the 25th .
我想获取一周中特定日期的日期，例如 Wednessday。即如果今天的日期是第 27 个星期五，则 Wednessday 实际上是第 25 个。
I could achieve this by
我可以通过
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);
String thisWed = String.format("%tF%n", calendar)
The challenge here is that java.util.Calendaris not supported in GWT client side, Is there a possible solution without having to move this code to server side ?
这里的挑战是java.util.CalendarGWT 客户端不支持，是否有可能的解决方案而不必将此代码移动到服务器端？
Thanks
谢谢
回答by koma
com.google.gwt.user.datepicker.client.CalendarUtilis what you are looking for, I guess;
com.google.gwt.user.datepicker.client.CalendarUtil我猜这就是你要找的东西；
回答by Thomas Broyer
Easiest would probably be to use Joda-time or similar, but all GWT ports of JodaTime have been abandonned: Date time library for gwt
最简单的可能是使用 Joda-time 或类似的，但 JodaTime 的所有 GWT 端口都已被放弃：gwt 的日期时间库
The most performant (no third-party dependency) would be to do the calculation yourself:
性能最好的（无第三方依赖）是自己进行计算：
Date d = new Date();
int dow = d.getDay();
int wed_delta = 3 - dow;
wed = new Date(d.getTime() + (86400 * wed_delta));
(the last line could be replaced with CalendarUtil.addDaysToDate(d, wed_delta), modifying din-place)
（最后一行可以替换为CalendarUtil.addDaysToDate(d, wed_delta)，d就地修改）
回答by user1335794
using DateTimeFormat, it allows format a java.util.Date into string or format a string into Date.
using DateTimeFormat，它允许将 java.util.Date 格式化为字符串或将字符串格式化为 Date。
Date date = new Date();
DateTimeFormat format = DateTimeFormat.getFormat("EEEE");
String day = format.parse(date);
回答by foal
You can use the Calendar emulation and org.jresearch.commons.gwt.shared.tools.Dates utility class from open/gwt project on bitbucket (https://bitbucket.org/JRS/open-gwt)
您可以在 bitbucket ( https://bitbucket.org/JRS/open-gwt)上使用 open/gwt 项目中的日历模拟和 org.jresearch.commons.gwt.shared.tools.Dates 实用程序类
The emulation and utility class based on ftr-gwt-library project (https://code.google.com/p/ftr-gwt-library/)
基于 ftr-gwt-library 项目的仿真和实用程序类 ( https://code.google.com/p/ftr-gwt-library/)
