DataSource ds = (DataSource)getServletContext().getAttribute(“”)找不到getServlet解决方案

DataSource ds = (DataSource)getServletContext().getAttribute(“”)找不到getServlet

我在测试监听器，结果DataSource ds = (DataSource)getServletContext().getAttribute(“dataSource”);这里面getServletContext()下面有红线，提示错误，请问该怎么解决？

这个测试类完整代码是：

package listener;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.UnsupportedEncodingException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.sql.DataSource;

public class TestLintener {

  public void test (HttpServletRequest request,HttpServletResponse response)

  {

  response.setContentType(“text/html;charSet=UTF-8”);

  response.setCharacterEncoding(“UTF-8”);

  try {

  request.setCharacterEncoding(“UTF-8”);

PrintWriter out = response.getWriter();

DataSource ds = (DataSource)getServletContext().getAttribute(“dataSource”);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

  }

}

public class TestLintener这行是不是少了点什么？