List按某字段排序

    // 在controller中排序的request排序出问题,单独写出按时间排序
    private List<TopServiceDetailInfo> orderList(List<TopServiceDetailInfo> topServiceDetailInfos){
		Collections.sort(topServiceDetailInfos, new Comparator<TopServiceDetailInfo>() {
		      public int compare(TopServiceDetailInfo o1, TopServiceDetailInfo o2) {
		          if (o1.getUpdateDate().getTime() > o2.getUpdateDate().getTime()) {
		              return -1;
		          }
		          if (o1.getUpdateDate() == o2.getUpdateDate()) {
		              return 0;
		          }
		          return 1;
		      }
		  });
		return topServiceDetailInfos;
    }