有关jsp连数据库

donkeylord · 发表于 2017-11-22 21:33:56

马上注册，结交更多好友，享用更多功能^_^

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jar包已装入，连接正常。但显示如下错误
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="gb2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
<base href="<%=basePath%>">

<title>My JSP 'wel.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


  </head>

  <body>
SUccess<%=request.getParameter("user") %><br>
<a href="login.jsp">返回重新登陆</a>
<h1>用户信息列表</h1>
<%
               //定义四个分页会用到的变量
         int pageSize=3;
         int pageNow=0;
         int pageCount=3;
         int rowCount=3;
         String driverClass = "com.mysql.jdbc.Driver";
         Class.forName(driverClass).newInstance();
         Connection ct=DriverManager.getConnection("jdbc:mysql://localhost:3306/student","root","");
         //?autoReconnect=true&useUnicode=true&characterEncoding=gbk&mysqlEncoding=utf8

         Statement sm=ct.createStatement();
         ResultSet rs=sm.executeQuery("select * from student1");

         if(rs.next()){
            rowCount=rs.getInt(1);


         }
         if(rowCount%pageSize==0){
            pageCount=rowCount/pageSize;
            }else{pageCount = rowCount/pageSize+1;
            }
         //查询需要显示的记录
         rs=sm.executeQuery("select top"+pageSize
         +" * from student1 where userid not in (select top "
         +pageSize*(pageNow-1)+" userid from student1)");
   %>
   <table border="1">
   <tr><td>用户id</td><td>用户名字</td><td>密码</td></tr>
   </table>
   <%
   while(rs.next()){
   %>
   <tr><td><%=rs.getInt(1) %></td><td><%=rs.getInt(2) %></td>
   <td><%=rs.getInt(3) %></td></tr>
   <%
   }
      %>
      </table>



   %>



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

我不知道。_ · 发表于 2017-12-8 14:19:45

Byboy · 发表于 2017-12-19 15:03:12

you have an error in your sql syntax; 说的很明白了呀 sql语句有错误

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