jsp报以下的错,搜索了还是解决不了。请大神指点
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 31 in the jsp file: /viewStudent.jsp
sbgl cannot be resolved to a type
28: Iterator it=sbgls.iterator();
29: while(it.hasNext())
30: {
31: sbgl temp=(sbgl)it.next();
32: out.println("<tr>");