jsp实现简单的分页

效果如下：

<%--
    Document   : page
    Created on : 2014-11-18, 8:55:02
    Author     : HJZ
--%>

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
    <head>
        <script language= "javascript">
            function dumpTo(tot) { //函数参数定义时不加var，否则出错
                    var pageMsg = document.getElementById("pageTo").value;
                    var patrn=/^\d+$/;
                    if (patrn.test(pageMsg)) {
                        if(parseInt(pageMsg)<1 || parseInt(pageMsg)>parseInt(tot)) return;
                        window.location.href="page.jsp?page=" + pageMsg;
                    }
            }
        </script>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>分页显示</title>
    </head>
    <body>
        <%
              int pageCur = 0;
              int pageTot = 20;
              int pageBegin = 0;
              String curPage  = request.getParameter("page");
              if(curPage == null) pageCur = 1;
              else pageCur = Integer.valueOf(curPage);
              pageBegin = pageCur-5;
              if(pageBegin < 1) pageBegin = 1;
        %>
        <talbe border="10">
              <tr>
                     <%if(pageCur!=1){%>
                            <td>
                                <input type="submit" name="skip" value="上一页" onclick="javascript:location.href='page.jsp?page=<%=pageCur-1%>'">
                            </td>
                     <%}%>
                     <% for(int i=pageBegin, j=1; j<=10 && i<=pageTot; ++i, ++j) {%>
                         <%if(i == pageCur){%>
                            <td>
                                <%=i%>
                            </td>
                         <%} else {%>
                            <td>
                                <input type="submit" name="skip" value="<%=i%>" onclick="javascript:location.href='page.jsp?page=<%=i%>'">
                            </td>
                         <%}%>
                     <% } %>

                     <%if(pageCur!=pageTot){%>
                             <td>
                                <input type="submit" name="skip" value="下一页" onclick="javascript:location.href='page.jsp?page=<%=pageCur+1%>'">
                            </td>
                     <%}%>
                     <td>
                         共<%=pageTot%>页
                     </td>
                     <td width="105px">
                         向第<input type="text" id="pageTo">页
                     </td>
                     <td>
                            <input type="button" name="skip" value="跳转" onclick="dumpTo(<%=pageTot%>)"> <!--传递总页数-->
                     </td>
              </tr>
        </table>
    </body>
</html>