SimpleDateFormat.Format（currentDate）不更改currentDate变量[duplicate]

Question

SimpleDateFormat sdfo = new SimpleDateFormat("yyyy-MM-dd");
Date currentDate = new Date();
sdfo.format(currentDate);
request.setAttribute("currentDate", currentDate);

当前日期:

我该在这里换什么？

Answer 1

您已将CurrentDate而不是格式化的日期字符串设置到Request中。

替换

sdfo.format(currentDate);
request.setAttribute("currentDate", currentDate);

与

String today = sdfo.format(currentDate);
request.setAttribute("currentDate", today);

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate currentDate = LocalDate.now();
String today = currentDate.format(formatter);
request.setAttribute("currentDate", today);