1：对集合进行分页
@Override
public IPage<FreeEntity> queryFreeList(FreeQuery freeQuery) {
String tag = redisTemplate.opsForHash().get("REDIS_DIC:af_server_suffix", freeQuery.getServerId()).toString();
String freeListResult = (String) redisTemplate.opsForHash().get(GeneralConstant.FREELIST + freeQuery.getTenantId(),
freeQuery.getTenantId() + tag);
List<FreeEntity> freeList = JSONObject.parseArray(freeListResult, FreeEntity.class);
List<FreeEntity> entityList = freeList.stream().skip(freeQuery.getPageSize() * (freeQuery.getPageNum() - 1)).limit(freeQuery.getPageSize()).collect(Collectors.toList());
Page<FreeEntity> freeEntityPage = new Page<>();
//总条数
freeEntityPage.setTotal(freeList.size());
//列表
freeEntityPage.setRecords(entityList);
//当前页
freeEntityPage.setCurrent(freeQuery.getPageNum());
//行数
freeEntityPage.setSize(freeQuery.getPageSize());
//总页数
freeEntityPage.setPages(getPages(freeList, freeQuery.getPageSize()));
return freeEntityPage;
}
/**
* 返回总页数
*
* @param obj
* @param pageSize
* @return
*/
public int getPages(List<FreeEntity> obj, Integer pageSize) {
int count = obj.size() / pageSize;
if (obj.size() == 0) {
return 0;
}
if (obj.size() <= pageSize) {
return 1;
} else if (count % pageSize == 0) {
return count;
} else {
return count + 1;
}
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