Velocity paging snippet

PageInfo.java

import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author by [email protected] on 2016-08-01.
 */
@Data
@NoArgsConstructor
public class PageInfo {
    public static final int QUANTITY_OF_CONTENTS_PER_PAGE = 20;
    public static final int QUANTITY_OF_PAGES = 10;

    /**
     * 현재 페이지
     */
    private int page;
    /**
     * 페이지 이동
     */
    private boolean pageablePrevious;
    private boolean pageableNext = true;
    private int startPage;
    private int maxPage;
    private int previous;
    private int next;
    /**
     * 게시물 시작 위치
     */
    private int offset;
    /**
     * 한번에 가져올 게시물 숫자
     */
    private int limit = QUANTITY_OF_CONTENTS_PER_PAGE;
    /**
     * 전체 게시물 숫자
     */
    private int total;
    /**
     * 전체 게시물 숫자
     */
    private int totalPages;
    /**
     * 연결할 링크
     */
    private String link;
    /**
     * 검색어
     */
    private String subject = "";
    private String keyword = "";

    public void setUp(String link, Integer total) {
        this.link = link;
        this.total = total;
        if (page == 0) {
            page = 1;
        }
        offset = (page - 1) * limit;
        totalPages = total / limit + ((total % limit > 0) ? 1 : 0);
        int remainder = page % QUANTITY_OF_PAGES;
        if (remainder == 0) {
            remainder = QUANTITY_OF_PAGES;
        }
        startPage = page - remainder + 1;
        maxPage = startPage + QUANTITY_OF_PAGES - 1;
        if (maxPage > totalPages) {
            maxPage = totalPages;
            pageableNext = false;
        } else {
            pageableNext = true;
        }
        pageablePrevious = startPage / QUANTITY_OF_PAGES > 0;
        previous = page - 1;
        if (previous < 1) {
            previous = -1;
        }
        next = maxPage + 1;
        if (next > totalPages) {
            next = -1;
        }
        if (this.offset < 0) {
            this.offset = 0;
        }
    }
}

paging.vm

<ul>
    #if (${pageInfo.pageablePrevious})
        <li><a href="${pageInfo.link}?page=0">&laquo;</a></li>
        #if (${pageInfo.previous} != -1)
            <li><a href="${pageInfo.link}?page=$pageInfo.previous">&lsaquo;</a></li>
        #end
    #end
    #foreach($i in [${pageInfo.startPage}..${pageInfo.maxPage}])
        <li #if(${pageInfo.page} == $i) class="active" #end>
          <a href="${pageInfo.link}?page=$i">$i</a>
        </li>
    #end
    #if (${pageInfo.pageableNext})
        <li><a href="${pageInfo.link}?page=$pageInfo.next">&rsaquo;</a></li>
        #if (${pageInfo.next} != -1)
            <li><a href="${pageInfo.link}?page=$pageInfo.totalPages">&raquo;</a></li>
        #end
    #end
</ul>