java - Java从日期输入中获取即将到来的日期

Question

我有以下输入

    String day = "Tuesday";
    SimpleDateFormat dayFormat = new SimpleDateFormat("E");
    Date date1 = dayFormat.parse(day);

今天的日期是 2012-10-19。通过输入这一天，我想取回下一个即将到来的日期和时间。如何将星期二转换为字符串，如下所示：2012-10-20 00:00？

谢谢你。

Answer 1

Use the Calendar API as follows -

    String day = "Tue";
    SimpleDateFormat dayFormat = new SimpleDateFormat("EEE");

    Date date1 = dayFormat.parse(day);        
    Calendar cal1 = Calendar.getInstance();
    cal1.setTime(date1); 

    //just keep adding a day to current date until the day of week is same
    Calendar cal = Calendar.getInstance();        
    while(cal.get(Calendar.DAY_OF_WEEK) != cal1.get(Calendar.DAY_OF_WEEK)) {
        cal.add(Calendar.DAY_OF_MONTH, 1);
    }

    System.out.println(cal.getTime());

Output:

Tue Oct 23 22:34:25 CDT 2012

Answer 2

Calendar这是一个关于如何使用课程获得下周一的示例。

Calendar now = Calendar.getInstance();  
int weekday = now.get(Calendar.DAY_OF_WEEK);  
if (weekday != Calendar.MONDAY)  
{  
    // calculate how much to add  
    // the 2 is the difference between Saturday and Monday  
    int days = (Calendar.SATURDAY - weekday + 2) % 7;  
    now.add(Calendar.DAY_OF_YEAR, days);  
}  
// now is the date you want  
Date date = now.getTime();  
String format = new SimpleDateFormat(...).format(date);

来自： http: //www.coderanch.com/t/385117/java/java/date-next-Monday

更多：http ://www.java2s.com/Code/Java/Data-Type/GetNextMonday.htm

Answer 3

您可以Calendar用于简单的日期操作。例如：

Calendar calendar = Calendar.getInstance(); //gets a localized Calendar instance
calendar.setTime(date1);                    //sets the Calendar time to your date
calendar.add(Calendar.DATE, 1);             //adds 1 day
Date date2 = calendar.getTime();            //gets the resulting date