我不知道你们怎么想，但我总想把这些东西当做一句俏皮话。其他的答案都很好，也很好用，但这里把它浓缩成一行。现在你脑子里的代码行数就少了:-)。

下面是一个班轮:

String currentDate = new SimpleDateFormat("yyyy-MM-dd").format(new Date());

date对象不能以自定义格式表示日期，而必须使用SimpleDateFormat。返回字符串的格式方法。

String myString=format1.format(date);

你的代码是错误的。没有必要解析日期并将其保留为date对象。

当您希望将日历日期对象显示为字符串时，可以对其进行格式化。

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, 1);
Date date = cal.getTime();             
SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd");          
String inActiveDate = null;
try {
    inActiveDate = format1.format(date);
    System.out.println(inActiveDate );
} catch (ParseException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
}

Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, 7);
Date date = c.getTime();
SimpleDateFormat ft = new SimpleDateFormat("MM-dd-YYYY");
JOptionPane.showMessageDialog(null, ft.format(date));

这将在JOption窗口窗格中以月、日和年的格式显示您的日期+ 7天。

public static String ThisWeekStartDate(WebDriver driver) {
        Calendar c = Calendar.getInstance();
        //ensure the method works within current month
        c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
        System.out.println("Before Start Date " + c.getTime());
        Date date = c.getTime();

          SimpleDateFormat dfDate = new SimpleDateFormat("dd MMM yyyy hh.mm a");

          String CurrentDate = dfDate.format(date);
          System.out.println("Start Date " + CurrentDate);
          return CurrentDate;

    }
    public static String ThisWeekEndDate(WebDriver driver) {

        Calendar c = Calendar.getInstance();
        //ensure the method works within current month
        c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
        System.out.println("Before End Date " + c.getTime());
        Date date = c.getTime();

          SimpleDateFormat dfDate = new SimpleDateFormat("dd MMM yyyy hh.mm a");

          String CurrentDate = dfDate.format(date);
          System.out.println("End Date " + CurrentDate);
          return CurrentDate;
    }

public static void main(String[] args) {
    Calendar cal = Calendar.getInstance();
    cal.set(year, month, date);
    SimpleDateFormat format1 = new SimpleDateFormat("yyyy MM dd");
    String formatted = format1.format(cal.getTime());
    System.out.println(formatted);
}