package me.hitu.utils; import java.io.Serializable; //by varrily public class PageUtil implements Serializable { private static final long serialVersionUID = -8689423380671812808L; public static final int DEFAULT_PAGE_SIZE = 10; private int pageIndex; private int pageSize; private int totalCount; private int pageCount; public PageUtil() { pageIndex = 1; pageSize = DEFAULT_PAGE_SIZE; } public PageUtil(String _pageIndex) { this(_pageIndex, ""); } public PageUtil(String _pageIndex, String _pageSize) { int pageIndex = 1; int pageSize = DEFAULT_PAGE_SIZE; if (null == _pageIndex || "".equals(_pageIndex)) { pageIndex = 1; } else { try { pageIndex = Integer.parseInt(_pageIndex); } catch (Exception e) { pageIndex = 1; } } if (null == _pageSize || "".equals(_pageSize)) { pageSize = DEFAULT_PAGE_SIZE; } else { try { pageSize = Integer.parseInt(_pageSize); } catch (Exception e) { pageSize = DEFAULT_PAGE_SIZE; } } if (pageIndex < 1) { pageIndex = 1; } if (pageSize < 1) { pageSize = 1; } this.pageIndex = pageIndex; this.pageSize = pageSize; } public PageUtil(int pageIndex, int pageSize) { if (pageIndex < 1) { pageIndex = 1; } if (pageSize < 1) { pageSize = 1; } this.pageIndex = pageIndex; this.pageSize = pageSize; } public PageUtil(int pageIndex) { this(pageIndex, DEFAULT_PAGE_SIZE); } public int getPageIndex() { return pageIndex; } public int getPageSize() { return pageSize; } public int getTotalCount() { return totalCount; } public int getPageCount() { return pageCount; } public int getFirstResult() { return (pageIndex - 1) * pageSize; } public boolean getHasPrevious() { return pageIndex > 1; } public boolean getHasNext() { return pageIndex < pageCount; } public void setTotalCount(int totalCount) { this.totalCount = totalCount; pageCount = totalCount / pageSize + (totalCount % pageSize == 0 ? 0 : 1); if (0 == totalCount) { if (pageIndex != 1) { pageIndex = 1; } } else { if (pageIndex > pageCount) { pageIndex = pageCount; } } } public boolean isEmpty() { return 0 == totalCount; } public void setPageIndex(int pageIndex) { this.pageIndex = pageIndex; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } public void setPageCount(int countInPage) { this.pageCount = countInPage; } }
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