Servlet config cannot be resolved

Hi, I have used:
http://java.sun.com/developer/technicalArticles/Intl/HTTPCharset/
to change my program to unicode.
When I put this section into my servlet:
ServletConfig config = getServletConfig();
encoding = config.getInitParameter("PARAMETER_ENCODING");it says that ServletConfig cannot be resolved or is not a type.
Any ideas why it says this?
Cheers.

Make sure that you have imported ServletConfig interface as
import javax.servlet.ServletConfig;or
import javax.servlet.*;

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         org.apache cannot be resolved to a type
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         org.apache cannot be resolved
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         org.apache cannot be resolved to a type
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         org.apache cannot be resolved
         org.apache cannot be resolved to a type
         org.apache cannot be resolved to a type
         org.apache cannot be resolved
         org.apache cannot be resolved
         org.apache cannot be resolved
         org.apache cannot be resolved to a type
         org.apache cannot be resolved
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         org.apache cannot be resolved to a type
         org.apache cannot be resolved to a type
         org.apache cannot be resolved to a type
         org.apache cannot be resolved to a type
         org.apache cannot be resolved to a type
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    this is my program...then iam getting following error.please any one can help me?
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    org.apache.jasper.JasperException: Unable to compile class for JSP:
    An error occurred at line: 4 in the jsp file: /oradata.jsp
    oracle.jdbc.driver.OracleDriver cannot be resolved to a type
    1: <%@page import="java.sql.*" %>
    2: <%
    3: //Register the drivers
    4: DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    5: //Establish connection with the database
    6: Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","system","manager");
    7: //create a sql statement
    Stacktrace:
         org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
         org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
         org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:423)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:316)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:294)
         org.apache.jasper.compiler.Compiler.compile(Compiler.java:281)
         org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
         org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
         org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
         org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
         javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    note The full stack trace of the root cause is available in the Apache Tomcat/6.0.16 logs.
    Apache Tomcat/6.0.16

    You need to have Oracles JDBC driver available to your web application.
    That means the driver (commonly called ojdbc14.jar) should be in either the WEB-INF/lib directory of your web application, or in the [TOMCAT]/lib directory.
    However it is generally accepted that Database connections from JSP pages are a bad idea.
    Put this logic in java code/beans.
    Even better, set up a [JNDI Datasource in Tomcat|http://tomcat.apache.org/tomcat-6.0-doc/jndi-datasource-examples-howto.html] that your web application can access. That way your code can be database independant.
    Cheers,
    evnafets

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