Questions about JSP database connections?

js| Data | database | database connection | problem
My connection program is as follows:
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<% @page contenttype= "text/html;charset=gb2312"%>
<%class.forname ("Com.microsoft.jdbc.sqlserver.SQLServerDriver"). newinstance ();
String url= "Jdbc:microsoft:sqlserver://localhost:1433;databasename=questionnaire";
Connection con= drivermanager.getconnection (URL, "sa", "801208161");
Statement smt=con.createstatement (resultset.type_scroll_sensitive,resultset.concur_updatable);
ResultSet rs;
String SQL;
%>
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Here is an error message:
An error occurred between Lines:1 and 7 in the JSP file:/opendata.jsp

Generated servlet error:
D:\tomcat\work\localhost\_\opendata$jsp.java:56:class org.apache.jsp.Connection not found.
Connection con= drivermanager.getconnection (URL, "sa", "801208161");
^


An error occurred between Lines:1 and 7 in the JSP file:/opendata.jsp

Generated servlet error:
d:\tomcat\work\localhost\_\opendata$jsp.java:56:undefined variable or class Name:drivermanager
Connection con= drivermanager.getconnection (URL, "sa", "801208161");
^


An error occurred between Lines:1 and 7 in the JSP file:/opendata.jsp

Generated servlet error:
D:\tomcat\work\localhost\_\opendata$jsp.java:57:class org.apache.jsp.Statement not found.
Statement smt=con.createstatement (resultset.type_scroll_sensitive,resultset.concur_updatable);
^


An error occurred between Lines:1 and 7 in the JSP file:/opendata.jsp

Generated servlet error:
D:\tomcat\work\localhost\_\opendata$jsp.java:58:class Org.apache.jsp.ResultSet not found.
ResultSet rs;
^
4 errors, 1 warning