开始显示的是1,2,3,4,5 第二页就是当我单击2,3的时候显示的还是1,2.3,4,5 单击4的时候显示的则是2,3,4,5,6 5的时候显示的是3,4,5,6,7 6的时候是4,5,6,7,8
package com.kt.servlet_qt; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.kt.bean.Easybuy_Shangpin; import com.kt.dao.impl.Easybuyimpl; public class ecommodityservlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); Easybuyimpl e = new Easybuyimpl(); // 显示多少条数据 int pagesize = 8; // 获取商品总记录数 int record = e.total(); // 计算商品有多少页数 int totalPage = record % pagesize == 0 ? (record / pagesize) : (record / pagesize + 1); // 获取多少页 String curpage = request.getParameter("curpage"); // 当前页 int count = -1; if (curpage != null) { count = Integer.parseInt(curpage); // 判断当前页是否小于0 if (Integer.parseInt(curpage) < 1) { count = 1; } // 判断当前页数是否超出数据现有页数 if (Integer.parseInt(curpage) >= totalPage) { count = totalPage; } } else { count = 1; } // 分页 List<Easybuy_Shangpin> findall_ShangpinFenye = e.findall_ShangpinFenye( (count - 1) * pagesize, pagesize); // 总页数 request.getSession().setAttribute("totalPage", totalPage); // 当前页数 request.getSession().setAttribute("count", count); // 页数的数据 request.getSession().setAttribute("findall_ShangpinFenye", findall_ShangpinFenye); request.getRequestDispatcher("product-list.jsp").forward(request, response); out.flush(); out.close(); } }
<div class="pager"> <ul class="clearfix"> <li><a href="ecommodityservlet?curpage=${count-1}">上一页</a></li> <c:choose> <c:when test="${count<=3 }"> <c:forEach begin="0" end="4" var="v"> <c:if test="${count==v+1}"> <li><a href="ecommodityservlet?curpage=${count-1}" style="color: red">${v+1 }</a> </li> </c:if> <c:if test="${count!=v+1}"> <li><a href="ecommodityservlet?curpage=${v+1}">${v+1 }</a> </li> </c:if> </c:forEach> </c:when> <c:when test="${count < totalPage-3 }"> <c:forEach begin="${count-2 }" end="${count+2 }" var="v"> <c:if test="${count==v+1 }"> <li><a href="ecommodityservlet?curpage=${v+1}" style="color: red">${v+1 }</a> </li> </c:if> <c:if test="${count!=v+1}"> <li><a href="ecommodityservlet?curpage=${v+1}">${v+1 }</a> </li> </c:if> </c:forEach> </c:when> <c:otherwise> <c:forEach begin="${totalPage-5 }" end="${totalPage-1 }" var="v"> <c:if test="${count==v+1 }"> <li><a href="ecommodityservlet?curpage=${v+1}" style="color: red">${v+1 }</a> </li> </c:if> <c:if test="${count!=v+1 }"> <li><a href="ecommodityservlet?curpage=${v+1}">${v+1 }</a> </li> </c:if> </c:forEach> </c:otherwise> </c:choose> <li><a href="ecommodityservlet?curpage=${ count+1}">下一页</a></li> </ul> </div> </div> </div>
时间: 2024-10-03 20:54:10