按照日期查询最近7天，一个月功能

　　　　　if ("30".equals(date)) {
             Calendar now = Calendar.getInstance();      
             now.setTime(new Date());      
             now.set(Calendar.DATE, now.get(Calendar.DATE) - 30);              
             param.addParam("addtime", Operator.GTE , now.getTime());
        }else if ("90".equals(date)) {
            Calendar now = Calendar.getInstance();      
             now.setTime(new Date());      
             now.set(Calendar.DATE, now.get(Calendar.DATE) - 90); 
             param.addParam("addtime", Operator.GTE , now.getTime());
        }else if ("180".equals(date)) {
            Calendar now = Calendar.getInstance();      
             now.setTime(new Date());      
             now.set(Calendar.DATE, now.get(Calendar.DATE) - 180); 
             param.addParam("addtime", Operator.GTE ,now.getTime());
        }else if ("7".equals(date)) {
            Calendar now = Calendar.getInstance();      
             now.setTime(new Date());      
             now.set(Calendar.DATE, now.get(Calendar.DATE) - 7); 
             System.out.println(now.getTime());
             param.addParam("addtime", Operator.GTE , now.getTime());
        }