配置连接池出错

server.xml文件加入:

<Context path="/" docBase="D:\test\" debug="0" >
<Resource name="jdbc/SqlServerDB" auth="Container" type="javax.sql.DataSource"/> <ResourceParams name="jdbc/SqlServerDB">
......
</Context>

测试代码：

<%@ page import= "java.sql.* "%>
<%@ page import= "javax.naming.* "%>

<%
try{

Context initCtx = new InitialContext();

Context ctx = (Context) initCtx.lookup("java:comp/env");
//获取连接池对象

Object obj = (Object) ctx.lookup("jdbc/SqlServerDB");

//类型转换

javax.sql.DataSource ds = (javax.sql.DataSource)obj;

Connection conn = ds.getConnection();

Statement stmt = conn.createStatement();

String strSql = " insert into test(id,name) values('00001','holen') ";

stmt.executeUpdate(strSql);

出错信息：

D:\JmEport\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\test_jsp.java:60: cannot resolve symbol
symbol : class DataSource
location: package sql
javax.sql.DataSource ds = (javax.sql.DataSource)obj;

什么回事？