jsp页面不能resolve 红色部分不能resolve解决方法

jsp页面不能resolve 红色部分不能resolve
<%
String ip = null;
String port = null;
String database = null;
String loginName = null;
String password = null;
String authenticationIP = null;

try{
  String filename = "";
  filename = getServletConfig().getServletContext().getRealPath("page\\ipconfig.xml");
  //out.println(filename);
  DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
  DocumentBuilder builder=factory.newDocumentBuilder();
  Document doc=builder.parse(new File( filename ));
  NodeList nl =doc.getElementsByTagName("level");
  for (int i=0;i<nl.getLength();i++){
Element node=(Element) nl.item(i);
 
ip = node.getElementsByTagName("ip").item(0).getFirstChild().getNodeValue();
port = node.getElementsByTagName("port").item(0).getFirstChild().getNodeValue();
database = node.getElementsByTagName("database").item(0).getFirstChild().getNodeValue();
loginName = node.getElementsByTagName("loginName").item(0).getFirstChild().getNodeValue();
password = node.getElementsByTagName("password").item(0).getFirstChild().getNodeValue();
authenticationIP = node.getElementsByTagName("authenticationIP").item(0).getFirstChild().getNodeValue();
  }
  }catch(Exception e){
  e.printStackTrace();
  }

%>

------解决方案--------------------------------------------------------
是不是包没有导入啊？