Question

要求：有两个dateFields，可帮助选择开始日期和结束日期。该范围之间的日期列表应显示在表格中。

帮助我解决vaadin 7的问题。

 public List<Date> getDatesBetween(final Date date1, final Date date2) {
        List<Date> dates = new ArrayList<Date>();

        Calendar calendar = new GregorianCalendar() {{
            set(Calendar.YEAR, date1.getYear());
            set(Calendar.MONTH, date1.getMonth());
            set(Calendar.DATE, date1.getDate());
        }};

        while (calendar.get(Calendar.YEAR) != date2.getYear() && calendar.get(Calendar.MONTH) != date2.getMonth() && calendar.get(Calendar.DATE) != date2.getDate()) {
            calendar.add(Calendar.DATE, 1);
            dates.add(new Date(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DATE)));
        }

        return dates;
    }

然后使用以下方式显示此列表：

    table=new Table("Employee dates!");
    table.removeAllItems();

   /// ...... within the loop 
    table.addItem();
  /// ...... within the loop 

 NOTE: an alternative way of getting the list of dates is appreciated.

Answer 1

如果我已经正确理解你想要在两个日期之间列出日期列表（我假设的日期）。你可以做点什么

public List<Date> getDatesBetween(final Date date1, final Date date2) {
    List<Date> dates = new ArrayList<Date>();
    Calendar c = Calendar.getInstance();
    c.setTime(date1);

    //dates.add(date1); //use it if you need the first day
    while(c.getTime().compareTo(date2) < 0) { //date1 is lesser than date2, use <= if you need the last day
        c.add(Calendar.DATE, 1);
        dates.add(c.getTime());
    }

    return dates;
}

现在将这些值正确地放在表中，因为它不是纯粹的＆＃34;项目＆＃34; s

Table tableDates = new Table("Dates from ... to ...");
tableDates.setSizeFull();
tableDates.setImmediate(true);
tableDates.addContainerProperty("date", Date.class, null);
tableDates.setColumnHeader("date", "Date");

然后对于你可以做的每个日期

Object[] tableRow = new Object[] {date}; //date is a Date object..you can merge this in the "getDatesBetween" method above
tableDates.addItem(tableRow , null); //null -> autogenerated id

Answer 2

主要问题是Date类方法已被弃用（并且具有误导性） getYear() javadoc写道：此日期所代表的年份，减去1900年。
此外，您必须在while语句表达式中将&&替换为||。

我的建议：

public static List<Date> getDatesBetween(final Date date1, final Date date2) {
    List<Date> dates = new ArrayList<Date>();

    Calendar cal1 = new GregorianCalendar();
    cal1.setTime(date1);
    Calendar cal2 = new GregorianCalendar();
    cal2.setTime(date2);

    while (cal1.get(Calendar.YEAR) != cal2.get(Calendar.YEAR)
            || cal1.get(Calendar.MONTH) != cal2.get(Calendar.MONTH)
            || cal1.get(Calendar.DATE) != cal2.get(Calendar.DATE)) {
        cal1.add(Calendar.DATE, 1);
        dates.add(cal1.getTime());
    }

    return dates;
}

显示Vaadin中选择的日期列表？

2 个答案: