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

Generated servlet error:
D:\jsp\WATMServer\Tomcat5\work\Catalina\localhost\_\org\apache\jsp\main\index_jsp.java:6: package admin does not exist
import admin.InOutHtml;
             ^


An error occurred at line: 2 in the jsp file: /main/index.jsp
Generated servlet error:
D:\jsp\WATMServer\Tomcat5\work\Catalina\localhost\_\org\apache\jsp\main\index_jsp.java:47: cannot find symbol
symbol  : class InOutHtml
location: class org.apache.jsp.main.index_jsp
InOutHtml IO=new InOutHtml();
^


An error occurred at line: 2 in the jsp file: /main/index.jsp
Generated servlet error:
D:\jsp\WATMServer\Tomcat5\work\Catalina\localhost\_\org\apache\jsp\main\index_jsp.java:47: cannot find symbol
symbol  : class InOutHtml
location: class org.apache.jsp.main.index_jsp
InOutHtml IO=new InOutHtml();
                 ^
3 errors



    org.apache.(DefaultErrorHandler.java:84)
    org.apache.(ErrorDispatcher.java:332)
    org.apache.(Compiler.java:412)
    org.apache.(Compiler.java:472)
    org.apache.(Compiler.java:451)
    org.apache.(Compiler.java:439)
    org.apache.jasper.(JspCompilationContext.java:511)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

刚学这个，看不明白

谢谢版主