# 使用stream api进行分页
List<User> list = new ArrayList<>();
List<User> subList = list.stream().skip((pageNo-1)*pageSize).limit(pageSize).collect(Collectors.toList());pageNo 为当前页数，pageSize为每页大小
# 配合JPA使用样例
public Object summaryList(IkgPage<BidMarginSummaryDTO> page) {
if (page == null || page.getPageSize() == -1) {
//不分页全量查询
if(null == page){
page = new IkgPage<BidMarginSummaryDTO>();
}
page.setPageNumber(1);
page.setPageSize(Integer.MAX_VALUE);
}
// Map<String, Object> param = page.getParams();
// if (param != null) {
//
// }
List<BidMarginSummaryDTO> summaryDTOList = new ArrayList<>();
List<Map<String, Object>> maps = bidmarginrecoveryRepo.getSummary();
for (Map<String, Object> map : maps) {
BidMarginSummaryDTO dto = new BidMarginSummaryDTO();
dto.setProjectId((String) map.get("projectId"));
dto.setCmpName((String) map.get("collectionUnit"));
dto.setNextDate((String) map.get("nextDate"));
double margin = (double) map.get("margin");
double currentAmount = (double) map.get("currentAmount");
double actualAmount = (double) map.get("actualAmount");
// 保证金
dto.setApplyAmount(margin);
// 保证金申请的实交金额
dto.setActualAmount(actualAmount);
// 已回收金额
dto.setRecoveryAmount(currentAmount);
// 未回收金额
dto.setNotRecoveryAmount(margin-currentAmount);
summaryDTOList.add(dto);
}
int total = summaryDTOList.size();
int pageSize = page.getPageSize();
int pageNo = page.getPageNumber();
// int pageSum = (total -1) / pageSize +1;
page.setTotal(total);
page.setRows(summaryDTOList.stream().skip((long) (pageNo - 1) *pageSize).limit(pageSize).collect(Collectors.toList()));
return page;
}