java项目中常用的分页对象Page

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在使用JAVA平台开发企业级应用时，常常会遇到分页的场景，而且每一个项目都有自己的分页方法。现在给出我自己总结的比较通用的分页对象，以供有需之人参考。
package cn.cgs.corejava.model.persistent;import java.io.Serializable;import java.util.List;/** * 与前端交互的分页数据对象 *  * @author 陈淦森 * @param <E> * @version 1.0.1 * @Date 2016年1月4日 */public class Page<E> implements Serializable {/** *  */private static final long serialVersionUID = -4973539948210269342L;/** * 默认页码 */public static final int DEFAULT_PAGE_NO = 1;/** * 默认页面大小 */public static final int DEFAULT_PAGE_SIZE = 10;/** * 默认的快速导航页码显示个数 */public static final int DEFAULT_PAGE_NAV_SIZE = 5;private int pageNo = DEFAULT_PAGE_NO; // 页码private int pageSize = DEFAULT_PAGE_SIZE; // 页面大小private int pageNaviSize = DEFAULT_PAGE_NAV_SIZE; // 页码快速导航显示的个数private int totalCount; // 总的记录数private List<E> resultList; // 返回的查询结果集public Page() {super();}public Page(int pageNo, int pageSize) {super();setPageNo(pageNo);setPageSize(pageSize);}public Page(int pageNo, int pageSize, int pageNaviSize) {this(pageNo, pageSize);setPageNaviSize(pageNaviSize);}public int getPageNo() {return pageNo;}public void setPageNo(int pageNo) {if (pageNo < 1) {pageNo = DEFAULT_PAGE_NO;}this.pageNo = pageNo;}public int getPageSize() {return pageSize;}public void setPageSize(int pageSize) {if (pageSize < 1) {pageSize = DEFAULT_PAGE_SIZE;}this.pageSize = pageSize;}public int getTotalCount() {return totalCount;}public void setTotalCount(int totalCount) {this.totalCount = totalCount;}public List<E> getResultList() {return resultList;}public void setResultList(List<E> resultList) {this.resultList = resultList;}public int getPageNaviSize() {return pageNaviSize;}/** * 返回快速导航页码 *  * @return */public int[] getPageNavis() {// 先运算出左，右边界int start = 0, end = 0;int a = pageNaviSize / 2;start = pageNo - a;if (pageNaviSize % 2 == 0) {end = pageNo + a - 1;} else {end = pageNo + a;}// 分三种情况处理int totalPages = getTotalPage();int[] b = new int[pageNaviSize];// 左边界if (start < 1) {for (int i = 0, step = 1; i < pageNaviSize; i++, step++) {if (step <= totalPages) {b[i] = step;} else {break;}}} else if (end > totalPages) {// 右边界for (int i = pageNaviSize - 1, step = totalPages; i >= 0; i--, step--) {if (step > 0) {b[i] = step;} else {break;}}} else {// 中间for (int i = 0; i < pageNaviSize; i++) {b[i] = start++;}}return b;}public void setPageNaviSize(int pageNaviSize) {if (pageNaviSize < 1) {pageNaviSize = DEFAULT_PAGE_NAV_SIZE;}this.pageNaviSize = pageNaviSize;}/** * 获得总的页码数量 *  * @return */public int getTotalPage() {if (totalCount % pageSize > 0) {return totalCount / pageSize + 1;} else {return totalCount / pageSize;}}/** * 获取从哪一条记录开始查询 *  * @return */public int getFirstIndex() {return (pageNo - 1) * pageSize;}/** * 获取最后一条记录的下标数（不包含） *  * @return */public int getLastIndex() {return getFirstIndex() + pageSize;}/** * 判断是否还有下一页 *  * @return */public boolean isHasNextPage() {return (pageNo + 1) <= getTotalPage();}/** * 获取下一个页码，在调用之前先调用<code>isHasNextPage()</code>方法进行判断 *  * @return */public int getNextPage() {return pageNo + 1;}/** * 判断是否还有上一页 * * @return */public boolean isHasPrePage() {return (pageNo - 1) > 0;}/** * 获取上一个页码，在调用之前先调用<code>isHasPrePage()</code>方法进行判断 *  * @return */public int getPrePage() {return pageNo - 1;}}
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