jsp分页

Posted 2020-09-23 bonly-ge

<% int pagesize = 3;//设置每页信息的个数 int totalrows = 0;//一共多少行 int totalpage = 0;//一共多少页 int curpage = 1;//当前页   String pageString = request.getParameter("curpage");//获取当前页 if (pageString != null && pageString.matches("\\d+")) {//判断当前页是否为空是否为数字 curpage = Integer.parseInt(pageString); }   Class.forName("com.mysql.jdbc.Driver"); Connection conn = DriverManager.getConnection("jdbc:mysql://192.168.2.63:3306/lianxi", "lianxi", "lianxi"); String sql = "select count(id) as totalrows from liuyan_list"; Statement stmt = conn.createStatement(); ResultSet rs = stmt.executeQuery(sql); if (rs.next()) { totalrows = rs.getInt(1);//因为受影响行数返回值就1行 totalpage = (int) Math.ceil(totalrows * 1.0 / pagesize);//总行数变成双精度向上取整 } if (totalpage != 0 && curpage >= totalpage) {//当前页大于总页数 curpage = totalpage; }   sql = "select * from liuyan_list_view order by id desc limit " + (curpage - 1) * pagesize + ",10";//显示第几条及1以后10条数据 rs = stmt.executeQuery(sql);//重新赋值 int floor = 0;//显示当前页面第几条 while (rs.next()) { floor++; %>

 

<div> 每页<% out.print(pagesize); %>条 当前第<% out.print(curpage); %>页 总<% out.print(totalpage); %>页 <% int step = 5;   int start = (int) Math.ceil(curpage * 1.0 / step); start = (start - 1) * step + 1; int end = start + step; if (totalpage < end) { end = totalpage + 1; } if (curpage > 1) { out.print("<a href=‘?curpage=1‘>首页</a> <a href=‘?curpage=" + (curpage - 1) + "‘>上一页</a>"); } for (int i = start; i < end; i++) { out.print("<a href=‘?curpage=" + i + "‘ " + (curpage == i ? "class=‘current‘" : "") + ">" + i + "</a>"); } if (curpage < totalpage) { out.print("<a href=‘?curpage=" + (curpage + 1) + "‘>下一页</a> <a href=‘?curpage=" + totalpage + "‘>末页</a>"); } %> </div>