[Java] 페이징

public class PageInfo {

	//총 개수
	private int total;
	//현재페이지
	private int currentPage;
	//페이지 수
	private int totalPages;
	//네비 첫 페이지
	private int navFirstPage;
	//네비 마지막 페이지
	private int navLastPage;
	//이전 페이지
	private int prevPage;
	//다음 페이지
	private int nextPage;
	//네비게이션
	private int[] pageList;
	//첫 페이지인지
	private boolean isFirstPage;
	//첫 네비인지
	private boolean isFirstNavPage;
	//마지막 페이지인지
	private boolean isLastPage;
	//마지막 네비인지
	private boolean isLastNavPage;

	public PageInfo(int total, int currentPage, int totalPages, int navFirstPage, int navLastPage, int prevPage,
		int nextPage, int[] pageList, boolean isFirstPage, boolean isFirstNavPage, boolean isLastPage,
		boolean isLastNavPage) {
		this.total = total;
		this.currentPage = currentPage;
		this.totalPages = totalPages;
		this.navFirstPage = navFirstPage;
		this.navLastPage = navLastPage;
		this.prevPage = prevPage;
		this.nextPage = nextPage;
		this.pageList = pageList;
		this.isFirstPage = isFirstPage;
		this.isFirstNavPage = isFirstNavPage;
		this.isLastPage = isLastPage;
		this.isLastNavPage = isLastNavPage;
	}

	public int getTotal() {
		return total;
	}

	public int getCurrentPage() {
		return currentPage;
	}

	public int getTotalPages() {
		return totalPages;
	}

	public int getNavFirstPage() {
		return navFirstPage;
	}

	public int getNavLastPage() {
		return navLastPage;
	}

	public int getPrevPage() {
		return prevPage;
	}

	public int getNextPage() {
		return nextPage;
	}

	public int[] getPageList() {
		return pageList;
	}

	public boolean isFirstPage() {
		return isFirstPage;
	}

	public boolean isFirstNavPage() {
		return isFirstNavPage;
	}

	public boolean isLastPage() {
		return isLastPage;
	}

	public boolean isLastNavPage() {
		return isLastNavPage;
	}

	@Override
	public String toString() {
		return "PageInfo{" +
			"total=" + total +
			", currentPage=" + currentPage +
			", totalPages=" + totalPages +
			", navFirstPage=" + navFirstPage +
			", navLastPage=" + navLastPage +
			", prevPage=" + prevPage +
			", nextPage=" + nextPage +
			", pageList=" + Arrays.toString(pageList) +
			", isFirstPage=" + isFirstPage +
			", isFirstNavPage=" + isFirstNavPage +
			", isLastPage=" + isLastPage +
			", isLastNavPage=" + isLastNavPage +
			'}';
	}
}

 

 

public class Pagination{

	private static int pageListLength = 10;
	private static int navigateLength = 5;

	public Pagination() {}

	public Pagination(int pageListLength, int navigateLength) {
		this.pageListLength = pageListLength;
		this.navigateLength = navigateLength;
	}
    
	public static PageInfo pageInfoSet(int page,int total){

		page = page <= 0 ? 1 :page;
		total = total <= 0 ? 0 : total;

		int totalPage = (int)Math.ceil((double)total /(double) pageListLength);
		int prevPage = page - 1 > 0 ? page > totalPage ? 0 : page - 1 : 0;
		int nextPage = page + 1 <= totalPage? page + 1 : 0;

		int pageCount = (int)Math.ceil((double)page/(double)navigateLength) - 1 ;
		int startPage = pageCount == 0 ? 1 : (pageCount * navigateLength) + 1;
		int naviLength = totalPage - (pageCount * navigateLength)  < navigateLength ?  totalPage - (pageCount * navigateLength) :navigateLength  ;
		int endPage =  startPage + naviLength - 1;


		int[] pageList = IntStream.rangeClosed(startPage, endPage).toArray();
		int navFirstPage = Arrays.stream(pageList).min().orElse(0);
		int navLastPage = Arrays.stream(pageList).reduce(0, Integer::max);
		boolean isFirstPage = page == 1;
		boolean isLastPage = page == totalPage;
		boolean isFirstNavPage =  page <= navigateLength ;
		boolean isLastNavPage =  (page == totalPage) || (int)Math.ceil((double)totalPage/(double) navigateLength) - 1 == pageCount;

		return new PageInfo(total,page,totalPage,navFirstPage,navLastPage,prevPage,nextPage,pageList,isFirstPage,isFirstNavPage,isLastPage,isLastNavPage);
	}
}

Pagination pagination = new Pagination(10,10);
PageInfo pageInfo = pagination.pageInfoSet(1,200);

System.out.println("pageInfo.toString() = " + pageInfo.toString());

 

pageInfo.toString() = 
PageInfo{total=200, currentPage=1, totalPages=20, navFirstPage=1, navLastPage=10
, prevPage=0, nextPage=2, pageList=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10], isFirstPage=true
, isFirstNavPage=true, isLastPage=false, isLastNavPage=false}