jsp数据库连接类错误 org.apache.jasper.JasperException: Unable to compile class for JSP

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

An error occurred at line: 7 in the generated java file
Only a type can be imported. yhgl.connectDB resolves to a package

An error occurred at line: 4 in the jsp file: /yonghuguanli/add.jsp
yhgl.connectDB cannot be resolved to a type
1: <%@ page language="java" contentType="text/html; charset=gb2312" import="java.sql.*"%>
2: <%@ page import="yhgl.connectDB" %>
3: <%
4: 	yhgl.connectDB db = new yhgl.connectDB();
5: 	String psw = request.getParameter("psw");
6: 	String name = request.getParameter("name");
7: 	if(psw.equals(request.getParameter("conpsw")))

An error occurred at line: 4 in the jsp file: /yonghuguanli/add.jsp
yhgl.connectDB cannot be resolved to a type
1: <%@ page language="java" contentType="text/html; charset=gb2312" import="java.sql.*"%>
2: <%@ page import="yhgl.connectDB" %>
3: <%
4: 	yhgl.connectDB db = new yhgl.connectDB();
5: 	String psw = request.getParameter("psw");
6: 	String name = request.getParameter("name");
7: 	if(psw.equals(request.getParameter("conpsw")))

Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:93)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:435)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:298)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:302)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)