java集合對象排序

List<SysOperatorLogs> list =new List<SysOperatorLogs>();//重寫compareComparator<SysOperatorLogs> comparator = new Comparator<SysOperatorLogs>(){      @Override    public int compare(SysOperatorLogs o1,SysOperatorLogs o2) {     return -o1.getOperateDate().compareTo(o2.getOperateDate());//時間倒敘    }  };  Collections.sort(list,comparator);