科隆雷达液位计说明书:JSP程序问题

:\Tomcat\work\Standalone\localhost\myjsp\TESTSYS\test\admin\chkadmin_jsp.java:51: cannot resolve symbol
symbol : class ConnOracle
location: package test
test.ConnOracle conn = null;
^

An error occurred at line: 2 in the jsp file: /TESTSYS/test/admin/chkadmin.jsp

Generated servlet error:
C:\Tomcat\work\Standalone\localhost\myjsp\TESTSYS\test\admin\chkadmin_jsp.java:53: cannot resolve symbol
symbol : class ConnOracle
location: package test
conn = (test.ConnOracle) pageContext.getAttribute("conn", PageContext.PAGE_SCOPE);
^

An error occurred at line: 2 in the jsp file: /TESTSYS/test/admin/chkadmin.jsp

Generated servlet error:
C:\Tomcat\work\Standalone\localhost\myjsp\TESTSYS\test\admin\chkadmin_jsp.java:56: cannot resolve symbol
symbol : class ConnOracle
location: package test
conn = (test.ConnOracle) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "test.ConnOracle");
^
3 errors

如何加class ConnOracle