初学者的小问题，我用BEAN写了一个操作类，为什么有错误呢，，，望指点
Operate   类
package   org.wdj.bean;

import   java.sql.Connection;
import   java.sql.ResultSet;
import   java.sql.Statement;

import   javax.naming.InitialContext;
import   javax.sql.DataSource;

public   class   Operate   {
private   Connection   con=null;
private   Statement   stmt=null;
public   Operate(){
try   {
javax.naming.Context   initCtx=new   InitialContext();
con=((DataSource)initCtx.lookup( "java:comp/env/jdbc/test ")).getConnection();
}   catch   (Exception   e)   {
//   TODO   自动生成   catch   块
e.printStackTrace();
}

}
public   ResultSet   getRS(String   sql)throws   Exception{
stmt=con.createStatement();
return   stmt.executeQuery(sql);

}
public   boolean   close()throws   Exception{
boolean   flag=true;
try{
con.close();
stmt.close();

}
catch(Exception   e){
flag=false;
}
return   flag;
}
}


MyJsp.jsp页
<%
        Operate   op=new   Operate();
        java.sql.ResultSet   rs=op.getRS( "select   *   from   test ");
        while(rs.next()){
        out.println(rs.getString( "username "));
        out.println( " <br> ");
        }
        if(op.close()){
        out.println( "true ");
          %>

出现错误提示是：
description   The   server   encountered   an   internal   error   ()   that   prevented   it   from   fulfilling   this   request.

exception  

org.apache.jasper.JasperException:   Unable   to   compile   class   for   JSP:  




------解决方案--------------------
都没连数据库的代码。。。。。。写的太混乱了
------解决方案--------------------
import org.wdj.bean.Operate;
------解决方案--------------------
加上
<jsp:useBean id= "xxx " scope= "page " class= "class文件的路径 " />
------解决方案--------------------
看楼主的程序，应该是使用的连接池。
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.aiyiweb.com/java-web/317.html
我的异常网推荐解决方案：org.apache.jasper.JasperException: Unable to compile class,http://www.aiyiweb.com/j2ee/2308.html