String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
Date dNow = new Date();   //当前时间
Date dBefore = new Date();
Calendar calendar = Calendar.getInstance(); //得到日历
calendar.setTime(dNow);//把当前时间赋给日历
calendar.add(Calendar.DAY_OF_MONTH, -1);  //设置为前一天
dBefore = calendar.getTime();   //得到前一天的时间

SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //设置时间格式
String defaultStartDate = sdf.format(dBefore);    //格式化前一天
String defaultEndDate = sdf.format(dNow); //格式化当前时间

System.out.println("前一天的时间是：" + defaultStartDate);
System.out.println("生成的时间是：" + defaultEndDate);  

Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DATE, -1); //得到前一天
Date date = calendar.getTime();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println(df.format(date));