首先写一个PageBean工具类:

public class PageBean<T> {
    private int currentPage = 1; // 当前页, 默认显示第一页
    private int pageCount = 4;   // 每页显示的行数(查询返回的行数), 默认每页显示4行
    private int totalCount;      // 总记录数
    private int totalPage;       // 总页数 = 总记录数 / 每页显示的行数  (+ 1)
    private List<T> pageData;       // 分页查询到的数据

    // 返回总页数
    public int getTotalPage() {
        if (totalCount % pageCount == 0) {
            totalPage = totalCount / pageCount;
        } else {
            totalPage = totalCount / pageCount + 1;
        }
        return totalPage;
    }
    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }

    public int getCurrentPage() {
        return currentPage;
    }
    public void setCurrentPage(int currentPage) {
        this.currentPage = currentPage;
    }
    public int getPageCount() {
        return pageCount;
    }
    public void setPageCount(int pageCount) {
        this.pageCount = pageCount;
    }
    public int getTotalCount() {
        return totalCount;
    }
    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    public List<T> getPageData() {
        return pageData;
    }
    public void setPageData(List<T> pageData) {
        this.pageData = pageData;
    }



}

创建一个接口并实现:

@Override
    public void getAll(PageBean<Employee> pb) {

        //查询总记录数;  设置到pb对象中
        int totalCount = this.getTotalCount();
        pb.setTotalCount(totalCount);

        /*
         * 问题: jsp页面,如果当前页为首页,再点击上一页报错!
         *              如果当前页为末页,再点下一页显示有问题!
         * 解决:
         *     1. 如果当前页 <= 0;       当前页设置当前页为1;
         *     2. 如果当前页 > 最大页数;  当前页设置为最大页数
         */
        // 判断
        if (pb.getCurrentPage() <=0) {
            pb.setCurrentPage(1);                       // 把当前页设置为1
        } else if (pb.getCurrentPage() > pb.getTotalPage()){
            pb.setCurrentPage(pb.getTotalPage());       // 把当前页设置为最大页数
        }

        // 获取当前页: 计算查询的起始行、返回的行数
        int currentPage = pb.getCurrentPage();
        int index = (currentPage -1 ) * pb.getPageCount();      // 查询的起始行
        int count = pb.getPageCount();                          // 查询返回的行数


        //分页查询数据;  把查询到的数据设置到pb对象中
        String sql = "select * from employee limit ?,?";

        try {
            // 得到Queryrunner对象
            QueryRunner qr = JdbcUtils.getQueryRuner();
            // 根据当前页,查询当前页数据(一页数据)
            List<Employee> pageData = qr.query(sql, new BeanListHandler<Employee>(Employee.class), index, count);
            // 设置到pb对象中
            pb.setPageData(pageData);

        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }

    @Override
    public int getTotalCount() {
        String sql = "select count(*) from employee";
        try {
            // 创建QueryRunner对象
            QueryRunner qr = JdbcUtils.getQueryRuner();
            // 执行查询, 返回结果的第一行的第一列
            Long count = qr.query(sql, new ScalarHandler<Long>());
            return count.intValue();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

控制层实现:

public class IndexServlet extends HttpServlet {
    // 创建Service实例
    private IEmployeeService employeeService = new EmployeeService();
    // 跳转资源
    private String uri;

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        try {
            //1. 获取“当前页”参数;  (第一次访问当前页为null) 
            String currPage = request.getParameter("currentPage");
            // 判断
            if (currPage == null || "".equals(currPage.trim())){
                currPage = "1";     // 第一次访问,设置当前页为1;
            }
            // 转换
            int currentPage = Integer.parseInt(currPage);

            //2. 创建PageBean对象,设置当前页参数; 传入service方法参数
            PageBean<Employee> pageBean = new PageBean<Employee>();
            pageBean.setCurrentPage(currentPage);

            //3. 调用service  
            employeeService.getAll(pageBean);    // 【pageBean已经被dao填充了数据】

            //4. 保存pageBean对象,到request域中
            request.setAttribute("pageBean", pageBean);

            //5. 跳转 
            uri = "/WEB-INF/list.jsp";
        } catch (Exception e) {
            e.printStackTrace();  // 测试使用
            // 出现错误,跳转到错误页面;给用户友好提示
            uri = "/error/error.jsp";
        }
        request.getRequestDispatcher(uri).forward(request, response);

    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doGet(request, response);
    }

}

视图层实现:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!-- 引入jstl核心标签库 -->
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>

    <title>分页查询数据</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
  </head>

  <body>
    <table border="1" width="80%" align="center" cellpadding="5" cellspacing="0">
        <tr>
            <td>序号</td>
            <td>员工编号</td>
            <td>员工姓名</td>
        </tr>
        <!-- 迭代数据 -->
        <c:choose>
            <c:when test="${not empty requestScope.pageBean.pageData}">
                <c:forEach var="emp" items="${requestScope.pageBean.pageData}" varStatus="vs">
                    <tr>
                        <td>${vs.count }</td>
                        <td>${emp.empId }</td>
                        <td>${emp.empName }</td>
                    </tr>
                </c:forEach>
            </c:when>
            <c:otherwise>
                <tr>
                    <td colspan="3">对不起,没有你要找的数据</td>
                </tr>
            </c:otherwise>
        </c:choose>

        <tr>
            <td colspan="3" align="center">
                当前${requestScope.pageBean.currentPage }/${requestScope.pageBean.totalPage }页       

                <a href="${pageContext.request.contextPath }/index?currentPage=1">首页</a>
                <a href="${pageContext.request.contextPath }/index?currentPage=${requestScope.pageBean.currentPage-1}">上一页 </a>
                <a href="${pageContext.request.contextPath }/index?currentPage=${requestScope.pageBean.currentPage+1}">下一页 </a>
                <a href="${pageContext.request.contextPath }/index?currentPage=${requestScope.pageBean.totalPage}">末页</a>
            </td>
        </tr>

    </table>
  </body>
</html>

注意:varStatus作用
varStatus=“vs”事实上定义了一个status名的对象作为varStatus的绑定值。

该绑定值也就是status封装了当前遍历的状态,比如,可以从该对象上查看是遍历到了第几个元素:${status.count}

c:forEach varStatus属性

current当前这次迭代的(集合中的)项
index当前这次迭代从 0 开始的迭代索引
count当前这次迭代从 1 开始的迭代计数
first用来表明当前这轮迭代是否为第一次迭代的标志
last用来表明当前这轮迭代是否为最后一次迭代的标志
begin属性值
end属性值
step属性值