仿Baidu,Google查询分页技术JAVA实现
在这里我简单说说我的实现思路,我将整个分页的技术全部封装在了一个Pagination的JavaBean中.具体代码如下：
package cn.csdn.util;
import java.util.List;
/**
?*
?* @author redarmy_chen
?*
?* @param <T>
?*/
public class Pagination<T> {
?// 分页信息
?private int nowpage;// 当前页
?private int countrecord;// 总记录
?private int countpage;// 总页数
?public static final int PAGESIZE = 5;// 每页显示的记录数
?private int startpage;// 页面中的起始页
?private int endpage;// 页面中的结束页
?private final int SHOWPAGE = 6;// 页面中显示的总页数 baidu,google显示的总页数是20
?// 在测试我们才用6来测试
?private List<T> allentities;
?private String url;
?/** 根据当前页及总记录数来构造分页对象 */
?public Pagination(int nowpage, int countrecord) {
??this.nowpage = nowpage;
??this.countrecord = countrecord;
??/** 计算总页数 */
??this.countpage = this.countrecord % this.PAGESIZE == 0 ? this.countrecord
????/ this.PAGESIZE
????: this.countrecord / this.PAGESIZE + 1;
??/** 计算startpage与endpage的值 */
??/** 总页数数是否小于4 */
??if (this.countpage < (this.SHOWPAGE / 2 + 1)) {
???this.startpage = 1; // 页面中起始页就是1
???this.endpage = this.countpage;// 页面中的最终页就是总页数
??} else {
???/** else中是总页数大于4的情况 */
???/** 首先当前页的值是否小于等于4 */
???if (this.nowpage <= (this.SHOWPAGE / 2 + 1)) {
????this.startpage = 1;
????this.endpage = this.nowpage + 2;
????/** 判断页面的最终页是否大于总页数 */
????if (this.endpage >= this.countpage) {
?????this.endpage = this.countpage;
????}
???} else {
????this.startpage = this.nowpage - 3;
????this.endpage = this.nowpage + 2;
????if (this.endpage >= this.countpage) {
?????this.endpage = this.countpage;
?????if (this.countpage < this.SHOWPAGE) {
??????this.startpage = 1;
?????} else {
??????this.startpage = this.endpage - 5;
?????}
????}
???}
??}
?}
?public int getNowpage() {
??return nowpage;
?}
?public void setNowpage(int nowpage) {
??this.nowpage = nowpage;
?}
?public int getCountrecord() {
??return countrecord;
?}
?public void setCountrecord(int countrecord) {
??this.countrecord = countrecord;
?}
?public int getCountpage() {
??return countpage;
?}
?public void setCountpage(int countpage) {
??this.countpage = countpage;
?}
?public int getStartpage() {
??return startpage;
?}
?public void setStartpage(int startpage) {
??this.startpage = startpage;
?}
?public int getEndpage() {
??return endpage;
?}
?public void setEndpage(int endpage) {
??this.endpage = endpage;
?}
?public List<T> getAllentities() {
??return allentities;
?}
?public void setAllentities(List<T> allentities) {
??this.allentities = allentities;
?}
?public String getUrl() {
??return url;
?}
?public void setUrl(String url) {
??this.url = url;
?}
}
?
原文地址：http://redarmychen.iteye.com/blog/946725
