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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; }<br>