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/** * @author Fred Zhu * 分页辅助工具 */ public class PageBean { private int currentPage = 1;// 当前页数 private int totalPages = 0;// 总页数 private int pageSize = 0;// 每页显示数 private int totalRows = 0;// 总数据数 private int startNum = 0;// 开始记录 private int endNum = pageSize;//结束记录 private int nextPage = 0;// 下一页 private int previousPage = 0;// 上一页 private boolean hasNextPage = false;// 是否有下一页 private boolean hasPreviousPage = false;// 是否有前一页 public PageBean(int pageSize, int currentPage, int totalRows) { this.pageSize = pageSize; this.currentPage = currentPage; this.totalRows = totalRows; //计算总页数 if ((totalRows % pageSize) == 0) { totalPages = totalRows / pageSize; } else { totalPages = totalRows / pageSize + 1; } //是否有下一页 if (currentPage >= totalPages) { hasNextPage = false; currentPage = totalPages; } else { hasNextPage = true; } //是否有上一页 if (currentPage <= 1) { hasPreviousPage = false; currentPage = 1; } else { hasPreviousPage = true; } startNum = (currentPage - 1) * pageSize;//开始记录数 if(totalPages-currentPage<1){ endNum = totalRows; }else{ endNum = currentPage*pageSize; } nextPage = currentPage + 1;//下一页页码 previousPage = currentPage - 1;//上一页页码 if (nextPage >= totalPages) { nextPage = totalPages; } if (previousPage <= 1) { previousPage = 1; } } public void refresh(int currentPage){ this.currentPage = currentPage; startNum = (currentPage - 1) * pageSize; if(totalPages-currentPage<1){ endNum = totalRows; }else{ endNum = currentPage*pageSize; } } public boolean isHasNextPage() { return hasNextPage; } public boolean isHasPreviousPage() { return hasPreviousPage; } /** * @return the nextPage */ public int getNextPage() { return nextPage; } /** * @param nextPage * the nextPage to set */ public void setNextPage(int nextPage) { this.nextPage = nextPage; } /** * @return the previousPage */ public int getPreviousPage() { return previousPage; } /** * @param previousPage * the previousPage to set */ public void setPreviousPage(int previousPage) { this.previousPage = previousPage; } /** * @return the currentPage */ public int getCurrentPage() { return currentPage; } /** * @param currentPage * the currentPage to set */ public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } /** * @return the pageSize */ public int getPageSize() { return pageSize; } /** * @param pageSize * the pageSize to set */ public void setPageSize(int pageSize) { this.pageSize = pageSize; } /** * @return the totalPages */ public int getTotalPages() { return totalPages; } /** * @param totalPages * the totalPages to set */ public void setTotalPages(int totalPages) { this.totalPages = totalPages; } /** * @return the totalRows */ public int getTotalRows() { return totalRows; } /** * @param totalRows * the totalRows to set */ public void setTotalRows(int totalRows) { this.totalRows = totalRows; } /** * @param hasNextPage * the hasNextPage to set */ public void setHasNextPage(boolean hasNextPage) { this.hasNextPage = hasNextPage; } /** * @param hasPreviousPage * the hasPreviousPage to set */ public void setHasPreviousPage(boolean hasPreviousPage) { this.hasPreviousPage = hasPreviousPage; } /** * @return the startNum */ public int getStartNum() { return startNum; } /** * @param startNum * the startNum to set */ public void setStartNum(int startNum) { this.startNum = startNum; } public int getEndNum() { return endNum; } public void setEndNum(int endNum) { this.endNum = endNum; } } |
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