如何获取昨天的日期

Question

我想知道昨天的日期，不是今天的日期，而是过去的日期。我用的是这个代码-

Calendar calendarMessage = Calendar.getInstance();
        Calendar calendarToday = Calendar.getInstance();
        calendarMessage.setTime(date);
        return calendarMessage.get(Calendar.YEAR) == calendarToday.get(Calendar.YEAR) &&
                calendarMessage.get(Calendar.DAY_OF_YEAR) == calendarToday.get(Calendar.DAY_OF_YEAR);

你能帮帮我吗？

Answer 1

试一下这条路..

public static String getYesterdayDate() {

    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
    Calendar cal = Calendar.getInstance();
    cal.add(Calendar.DATE, -1);
    return dateFormat.format(cal.getTime());
}

Answer 2

以下内容应该适用于您：

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, -1);
System.out.println("Yesterday's date = "+ cal.getTime());

private String getYesterdayDateString() {
        DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        Calendar cal = Calendar.getInstance();
        cal.add(Calendar.DATE, -1);    
        return dateFormat.format(cal.getTime());
}