Question

jsp中怎么有这种错误，The method getContextPath() is undefined for the type ServletContext

明明就有这个方法啊，

org.apache.jasper.JasperException: Unable to compile class for JSP:

An error occurred at line: 4 in the jsp file: /MyJsp.jsp
The method getContextPath() is undefined for the type ServletContext
1: <%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
2: <%
3: //String path = request.getContextPath();
4: String path = config.getServletContext().getContextPath();
5: out.println(path);
6: String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
7: %>

Answer 1

应该是Servlet版本的问题，低版本的request对象没这个方法。

不同应用服务器Servlet版本不同，移植的时候会出现问题。

Answer 2

注意你引的包的版本，低版本的就没有此方法。

Answer 3

getContextPath()
方法未定义错误吗！
undefined for the type ServletContext