jsp连接数据库问题（寡人是菜鸟级人物）
连接数据库的bean

package   conb;
import   java.sql.*;
public   class   ConnectBean{
private   Connection   con;
private   ResultSet   rs;
//类方法   建立数据库连接  
public   static   Connection   getConnection()   throws   SQLException{
try{Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ");
}
catch(ClassNotFoundException   e)
{
e.printStackTrace();
}
return   DriverManager.getConnection( "jdbc:microsoft:sqlserver:1433;databaseName=myblog ", "sa ", "lluuzhou ");
}
//SQL查询语句
public   ResultSet   executeQuery(String   sql){
Statement   st=null;
ResultSet   rs=null;
try{
con=ConnectBean.getConnection();
st=con.createStatement();
rs=st.executeQuery(sql);
}
    catch(SQLException   e)
    {
    System.err.print(e);
    }
return   rs;
}
//SQL修改语句
public   int   executeUpdate(String   sql){
Statement   st=null;
int   rs=0;
try{
con=ConnectBean.getConnection();
st=con.createStatement();
rs=st.executeUpdate(sql);
          }
    catch(SQLException   e)
    {
    System.err.print(e);
    }
    finally
            {
        try{
          ……
          ……

//jsp页面文件
<%@page   contentType= "text/html;charset=gb2312 "   language= "java "   import= "java.sql.* "   errorPage= " "%>
<%@page   import= "conb.ConnectBean "%>
<jsp:useBean   id= "condb "   scope= "session "   class= "conb.ConnectBean "> </jsp:useBean>
<%
//获取前台登陆信息（姓名、密码）
String   user_n=String.valueOf(session.getAttribute( "user_name "));
String   pass_w=String.valueOf(session.getAttribute( "pass_word "));
if(user_n!=null&&pass_w!=null)
//连接数据库

//String   sql= "SELECT   *   FROM   manage   WHERE   admin= ' "+user_n+ " 'AND   password= ' "+pass_w+ " ' ";
ResultSet   rs=condb.executeQuery( "SELECT   *   FROM   manage   WHERE   admin= ' "+user_n+ " 'AND   password= ' "+pass_w+ " ' ");
if(rs.next()){
response.sendRedirect( "manage.jsp ");
}
else{
out.print( "…… ");
}
%>

执行到这个页面的时候就会出错，
org.apache.jasper.JasperException:   Unable   to   compile   class   for   JSP:  

An   error   occurred   at   line:   12   in   the   jsp   file:   /admin/check.j