运行一个jsp是出错，求大侠们帮帮忙

HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage 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: An error occurred at line: 6 in the jsp file: /DisplayCourse.jsp
checkEnrol cannot be resolved to a type
3: <head>
4: <meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>选报课程</title>
5: </head>
6: <jsp:useBean id="check" scope="page" class="checkEnrol">
7: </jsp:useBean>
8: <body bgcolor="#0099FF" text="#FFFFFF" link="#00FF00" >
9: 您可以选报的课程为 
An error occurred at line: 6 in the jsp file: /DisplayCourse.jsp
checkEnrol cannot be resolved to a type
3: <head>
4: <meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>选报课程</title>
5: </head>
6: <jsp:useBean id="check" scope="page" class="checkEnrol">
7: </jsp:useBean>
8: <body bgcolor="#0099FF" text="#FFFFFF" link="#00FF00" >
9: 您可以选报的课程为 
An error occurred at line: 6 in the jsp file: /DisplayCourse.jsp
checkEnrol cannot be resolved to a type
3: <head>
4: <meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>选报课程</title>
5: </head>
6: <jsp:useBean id="check" scope="page" class="checkEnrol">
7: </jsp:useBean>
8: <body bgcolor="#0099FF" text="#FFFFFF" link="#00FF00" >
9: 您可以选报的课程为 
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:326)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.32 logs.
--------------------------------------------------------------------------------Apache Tomcat/6.0.32

解决方案 »

免费领取超大流量手机卡，每月29元包185G流量+100分钟通话, 中国电信官方发货

checkEnrol 看一下这个类import到jsp文件中没有，如果有再检查这个类是否已经被编译且放到tomcat的相应目录下。
怎么看checkEnrol 这个类import到jsp中额，还有就是这个jsp执行后没有生成.java 和.class文件
看一下这个类有没有导入：<%@ page import="包名/checkEnrol"%>,因为这个jsp没有编译通过，所有没有生成.class文件。
在你的这个页面中有一个应该是
DisplayCourse.jsp <jsp:useBean id="check" scope="page" class="checkEnrol">
</jsp:useBean>问题就在这里。
class属性表示要使用哪个类(即JavaBean)，这里是checkEnrol类,而id属性表示所生成的实例名称，这里是check，scope属性表示该实例的生存期，这里是page,即在页面范围中有效
可能是你的JavaBean类文件checkEnrol 不符合javaBean的规范吧
检查一下字段类型和生成的set和get方法
<jsp:useBean id="check" scope="page" class="checkEnrol">
</jsp:useBean>
错误提示,不知道checkEnrol是什么,找不到checkEnrol
1、确认类checkEnrol名字是否正确
2、确认类checkEnrol路径是否正确,需要全路径,包名.类名的方式
莫非lz没有源码？  还是.....嗯，同意楼上几位大神说的，你好好检查一下你这个  checkEnrol这个类，是名字错误或者路径错误。
这是我的checkEnrol.java的源文件import java.sql.*;
public class checkEnrol{

public boolean hasPassPrepare(String prepare){   //是否完成预修课
  boolean f=false;
  int a=0;
  String temp=null;
  String sql="select score "+
"from enrol,classes ,course "+
"where   enrol.class_id=classes.id "+
"and classes.cour_id=course.id "+
"and course.id='"+prepare+"' ";
      sqlBean db=new sqlBean();
      try{
       ResultSet rs = db.executeQuery(sql);
       if(rs.next())
       temp=rs.getString("score");
       }catch(SQLException e){System.out.print(e.toString());}
       if(temp==null || temp.equals(""))
       return false;
       else{
       try{
       a=Integer.parseInt(temp);
       } catch(NumberFormatException e){System.out.print(e.toString());}
       if(a>=60) f=true;}
       return f;
}


public boolean hasLogin(String stu_id,String cour_id){   //该学生是否已经注册该课程
   boolean f=true;
   String sql="select stu_id,class_id "+
"from enrol,classes "+
"where stu_id='"+stu_id+"' "+
"and classes.id=enrol.class_id "+
"and cour_id='"+cour_id+"' ";
   sqlBean db =new sqlBean();
   try{
   ResultSet rs=db.executeQuery(sql);
   if(rs.next()){ f=false;}
   else{ f=true;}
   }catch(Exception e){ e.getMessage();}
   return f;
                          }


   public ResultSet getCourse(String stu_id)
    {




    String sql="select DISTINCT course.id,course.name,course.prepare,course.dep , "+
"classes.id as class_id,classes.room_id,classes.cour_time,teacher.name as tea_name "+
"from course,classes,teacher "+
"where classes.cour_id=course.id  "+
"and classes.tea_id=teacher.id "+
"and classes.id in "+
"( select classes.id from classes,student,course  "+
"where classes.id not in( select class_id from enrol where stu_id='"+stu_id+"') "+
"and ( student.department=course.dep or course.dep ='public')  "+
"and course.id=classes.cour_id and student.id='"+stu_id+"') ";

     sqlBean db = new sqlBean();
   ResultSet rs=  db.executeQuery(sql);

   return rs;

                             }




  public String getTotalMark(String id){
     String temp="0";
     String sql="select  from student where id='"+id+"'  ";
     sqlBean db = new sqlBean();
      ResultSet rs=  db.executeQuery(sql);
        try{
         if(rs.next())
         temp=rs.getString("");
         } catch(Exception e){}
         return temp;
         }

public int updatestu(String pw,String id,String e_mail,String tel){
int num=0;

        String sql="update student set password='"+pw+"',e_mail='"+e_mail+"',tel='"+tel+"'  where id='"+id+"'  ";
sqlBean db = new sqlBean();
num=db.executeInsert(sql);
return num;

}


   public int enrol(String class_id,String stu_id){
           int num=0;
            String sql="insert into enrol(stu_id,class_id) "+
            " VALUES('"+stu_id+"','"+class_id+"')   ";
              sqlBean db = new sqlBean();
             num= db.executeInsert(sql);
             return num;
            }


}
这是DisplayCourse.jsp的源文件<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="errorpage.jsp" %>
<%@ page import="checkEnrol.java" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>选报课程</title>
</head>
<jsp:useBean id="check" scope="page" class="checkEnrol"/>
<body bgcolor="#0099FF" text="#FFFFFF" link="#00FF00" >
您可以选报的课程为 
<table border="1" align="center">
 <tr>
 <td width="54">课程号</td>
 <td width="54">课程名</td>
 <td width="57">预修课</td>
 <td width="58">系别</td>
 <td width="59">班级号</td>
 <td width="69">教室号</td>
 <td width="88">上课时间</td>
<td width="88">教师</td>
 <td width="83">选择</td>
 </tr>
 
 <%
String id = (String)session.getAttribute("id");
String cour_id,name,dep,prepare,class_id,room_id,cour_time;
String tea_name=null;
ResultSet rs=null;
rs=check.getCourse(id);
while(rs.next()){
cour_id=rs.getString("id");
name=rs.getString("name");
prepare=rs.getString("prepare");
dep=rs.getString("dep");
class_id=rs.getString("class_id");
room_id=rs.getString("room_id");
cour_time=rs.getString("cour_time");
tea_name=rs.getString("tea_name");
%>
 <tr>
 <td><%=cour_id%></td>
 <td><%=name%></td>
 <td><%=prepare%></td>
 <td><%=dep%></td>
 <td><%=class_id%></td>
 <td><%=room_id%></td>
 <td><%=cour_time%></td>
<td><%=tea_name%></td>
 <td><a href="StudentLoginSvlt?action=enrol&id=<%=id%>&cour_id=<%=cour_id%>&class_id=<%=class_id%>&prepare=<%=prepare%> ">注册</a>
 </td>
 </tr>
 <%
}
%>
</table>
 
<a href="student.jsp"> <<Back </a> 
</body>
</html>
这是我的路径E:\tomcat\webapps\test\WEB-INF\classes，没有打包，名字没有错
javaBean 不能是裸体类（没有包）
所以你把他放包中试试  还要注意命名习惯，类名第一个字母严格说应该是大写的
jsp:useBean  标签不准许javaBean为裸体类（不在任何包中）
你把checkEnrol放包中试试还要注意命名习惯，类名第一个字母严格说应该是大写的
发生错误行：6，在JSP文件：/ DisplayCourse.jsp
checkEnrol类中没有某个类型
包是打好了，但出现org.apache.jasper.JasperException: /DisplayCourse.jsp(7,0) The value for the useBean class attribute bean.CheckEnrol is invalid.
了这个错误是不是checkEnrol这个源代码出错了啊
你在jsp：useBean标签中引用这个类时候要把包名字给完整地写上去
例如你的CheckEnrol在com.csdn包下那就这样写
<jsp:useBean id="check" scope="page" class="com.csdn.CheckEnrol"/>
<%@ page import="bean.CheckEnrol.java" %>
.
.
.
.
<jsp:useBean id="check" scope="page" class="com.csdn.CheckEnrol"/>
LZ类写的是不是不符合JAVABEAN要求啊
一般的java类要成为JavaBean符合以下条件
1.公共无参数的构造函数
2.每一个属性都要有setter,getter方法
3.实现Serializable接口