页面类-第一个自己设计的类

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package com.yiji.serc.web.util;import java.util.ArrayList;import java.util.List;public class PageUtil {/** 显示起始页 */private int start;/** 显示末页 */private int end;/** 总的页面数 */private int pageSum = 10;/** 当前页面数 */private int currentPage = 1;/** 每页数据数 */private int pageNumber = 10;/** 总的数据条数 */private int dataSum = 100;/** 显示的页面数 */private int showPage = 5;/** 查询起始数据 */private int startPage = 0;/** 查询结束数据 */private int endPage = 0;public PageUtil(int pageNumber, int dataSum) {setPageUtil(pageNumber, dataSum);}private void setPageUtil(int pageNumber, int dataSum) {this.pageNumber = pageNumber;this.dataSum = dataSum;if (dataSum % pageNumber != 0)pageSum = dataSum / pageNumber + 1;elsepageSum = dataSum / pageNumber;startPage = (currentPage - 1) * pageNumber;endPage = startPage + pageNumber - 1 < dataSum ? startPage + pageNumber- 1 : dataSum - 1;}// 页面显示的页数public List<Integer> getPages() {List<Integer> pages = new ArrayList<Integer>();if (currentPage - showPage / 2 < 1)start = 1;else if (currentPage + showPage / 2 >= pageSum) {start = pageSum - showPage;if (start < 1)start = 1;} elsestart = currentPage - showPage / 2;end = start + showPage <= pageSum ? start + showPage : pageSum;for (int i = start; i < end; i++) {pages.add(i);}return pages;}public int getShowPage() {return showPage;}public int getStartPage() {return startPage;}public void setStartPage(int startPage) {this.startPage = startPage;}public int getStart() {return start;}public void setStart(int start) {this.start = start;}public int getEnd() {return end;}public void setEnd(int end) {this.end = end;}public int getEndPage() {return endPage;}public void setEndPage(int endPage) {this.endPage = endPage;}public void setShowPage(int showPage) {this.showPage = showPage;}public PageUtil() {}public int getPageSum() {return pageSum;}public void setPageSum(int pageSum) {this.pageSum = pageSum;}public int getCurrentPage() {return currentPage;}public void setCurrentPage(int currentPage) {this.currentPage = currentPage;setPageUtil(pageNumber, dataSum);}public int getPageNumber() {return pageNumber;}public void setPageNumber(int pageNumber) {this.pageNumber = pageNumber;}public int getDataSum() {return dataSum;}public void setDataSum(int dataSum) {this.dataSum = dataSum;}}
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