关于JSP数据库连接的问题？

我的连接程序如下：
----------------------------------------------
<%@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;
%>
------------------------------------------------------

以下是出错信息：
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

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