日期的处理
获取当前日期，并且向前推一个星期
这个代码怎么写！~~~~~~~~~~~最好能写好给我。。。急用！~~~~~

------解决方案--------------------
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String dateStr = sdf.format(date);
System.out.println(dateStr);


------解决方案--------------------
Date date = new Date();
long time = date.getTime();
time = time - 1000 * 3600 * 24 * 7;
Date newDate = new Date(time);
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Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.WEEK, -1);
Date d = calendar.getTime();
------解决方案--------------------
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.WEEK, 1);
Date d = calendar.getTime();
------解决方案--------------------
Calendar c = Calendar.getInstance();
c.set(Calendar.DAY_OF_MONTH,c.get(Calendar.DAY_OF_MONTH) - 7);
Date date = c.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String dateStr = sdf.format(date);
System.out.println(dateStr);
------解决方案--------------------

探讨

Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.WEEK, -1);
Date d = calendar.getTime();

------解决方案--------------------
4楼正确
------解决方案--------------------

探讨

Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.WEEK, -1);
Date d = calendar.getTime();