Java list 分页(多种方式)

方式一:
public static void fenye(List list,int pagesize){
int totalcount=list.size();
int pagecount=0;
int m=totalcount%pagesize;
if (m>0){
pagecount=totalcount/pagesize+1;
}else{
pagecount=totalcount/pagesize;
}
for(int i=1;i<=pagecount;i++){
if (m==0){
List<Integer> subList= list.subList((i-1)*pagesize,pagesize*(i));
System.out.println(subList);
}else{
if (i==pagecount){
List<Integer> subList= list.subList((i-1)*pagesize,totalcount);
System.out.println(subList);
}else{
List<Integer> subList= list.subList((i-1)*pagesize,pagesize*(i));
System.out.println(subList);
}
}
}
}
List<Integer> list=new ArrayList<Integer>();
for(int i=1;i<52;i++){
list.add(i);
}
fenye(list,10);
方式二:
public <T> List<List<T>> splitList(List<T> list, int pageSize)
{
int listSize = list.size();
int page = (listSize + (pageSize - 1)) / pageSize;
List<List<T>> listArray = new ArrayList<List<T>>();
for (int i = 0; i < page; i++)
{
List<T> subList = new ArrayList<T>();
for (int j = 0; j < listSize; j++)
{
int pageIndex = ((j + 1) + (pageSize - 1)) / pageSize;
if (pageIndex == (i + 1))
{
subList.add(list.get(j));
}
if ((j + 1) == ((j + 1) * pageSize))
{
break;
}
}
listArray.add(subList);
}
return listArray;
}
方式三:
public SearchResult paging(List<T> list, int pageNumber, int pageSize) throws Exception{
List<T> pageList = new ArrayList<T>();
int currIdx = (pageNumber > 1 ? (pageNumber -1) * pageSize : 0);
for (int i = 0; i < pageSize && i < list.size() - currIdx; i++){
T listNew = list.get(currIdx + i);
pageList.add(listNew);
}
SearchResult<T> searchResult = new SearchResult<T>();
searchResult.setList(pageList);
searchResult.setTotal(list.size());
if (searchResult.getTotal()%pageSize == 0){
searchResult.setPages((int)searchResult.getTotal()/pageSize);
}else {
searchResult.setPages((int)searchResult.getTotal()/pageSize + 1);
}
searchResult.setPageNum(pageNumber);
searchResult.setPageSize(pageSize);
searchResult.setSize(pageList.size());
//是否是第一页
if (pageNumber == 1){
searchResult.setIsFirstPage(true);
}else {
searchResult.setIsFirstPage(false);
}
//是否是最后一页
if ((searchResult.getTotal() - pageNumber*pageSize) > 0){
searchResult.setIsLastPage(false);
}else {
searchResult.setIsLastPage(true);
}
return searchResult;
}
方式四:
List<Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
list.add(4);
list.add(5);
int page = 2;//相当于pageNo
int count = 20;//相当于pageSize
int size = list.size();
int pageCount=size/count;
int fromIndex = count * (page - 1);
int toIndex = fromIndex + count;
if (toIndex >= size) {
toIndex = size;
}
if(page>pageCount+1){
fromIndex=0;
toIndex=0;
}
System.out.println(list.subList(fromIndex, toIndex));