一个简单封装的分页类

/*
 * 创建日期 2005-1-10
 * this.url = this.url.replaceAll("(&?start=//d*)|(&?pagesize=//d*)", "");
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 * @author 黄安邦
 */
package com.site.web;

/**
 * @author Owner
 *
 * TODO 要更改此生成的类型注释的模板，请转至 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
public class Pager {

 private int start = 0; //当前页

 private int pageSize = 20; //每页记录数

 private int totalRec = 0; //总记录数

 private int totalPage = 0; //总页数

 private String url = null; //路径

 private String description = null;

 public Pager(int totalRec, int start, int pageSize, String url) {
  this.totalRec = totalRec;
  this.pageSize = pageSize;
  this.totalPage = this.totalRec % this.pageSize == 0 ? this.totalRec
    / this.pageSize : this.totalRec / this.pageSize + 1;
  if (start < 0) {
   this.start = 0;
  } else if (start > totalRec) {
   this.start = (this.totalPage - 1) * pageSize;
  } else {
   this.start = start;
  }
  this.url = url;
  setDescription();
 }

 public void setDescription() {
  StringBuffer sb = new StringBuffer();
  sb.append("每页<b>");
  sb.append(this.pageSize + "</b>条记录&nbsp;|");
  sb.append("&nbsp;共<b>");
  sb.append(this.totalPage + "</b>页/<b>");
  sb.append(this.totalRec + "</b>条记录&nbsp;|");

  this.url = this.url.replaceAll("(&?start=//d*)|(&?pagesize=//d*)", "");

  if (this.start < this.pageSize) {
   sb.append("&nbsp;首&nbsp;&nbsp;页&nbsp;&nbsp;上一页");
  } else {
   sb.append("&nbsp;<a href='").append(this.url).append(
     "&start=0&pagesize=").append(this.pageSize).append(
     "'>首&nbsp;&nbsp;页</a>");

   sb.append("&nbsp;&nbsp;<a href='").append(this.url).append(
     "&start=").append(this.start - this.pageSize).append(
     "&pagesize=").append(this.pageSize).append("'>上一页</a>");

  }

  if ((this.start >= (this.totalPage - 1) * this.pageSize)
    || (this.totalPage <= 1)) {
   sb.append("&nbsp;&nbsp;下一页&nbsp;&nbsp;尾&nbsp;&nbsp;页");
  } else {
   sb.append("&nbsp;&nbsp;<a href='").append(this.url).append(
     "&start=").append(this.start + this.pageSize).append(
     "&pagesize=").append(this.pageSize).append("'>下一页</a>");

   sb.append("&nbsp;&nbsp;<a href='").append(url).append("&start=")
     .append((this.totalPage - 1) * this.pageSize).append(
       "&pagesize=").append(this.pageSize).append(
       "'>尾&nbsp;&nbsp;页</a>");
  }
  sb.append("&nbsp;|&nbsp;第<b>" + (this.start / this.pageSize + 1)
    + "</b>页");
  this.description = sb.toString();
 }

 public String getDescription() {
  return this.description;
 }

 public int getStart() {
  return this.start;
 }

 //test
 public static void main(String[] args) {
  Pager x = new Pager(13, 15, 3,
    "http://localhost:8080/members.do?action=list&pagesize=3&start=15");
  System.out.println(x.getDescription());
 }
}