javax.servlet.jsp.JspException cannot be resolved to a type

javax.servlet.jsp.JspException cannot be resolved to a type The type javax.servlet.ServletContext cannot be resolved.It javax.servlet.jsp.JspException:Cannot find bean under name o javax.servlet.jsp.JspException:Cannot find ActionMappings or jsp:javax.servlet.jsp.JspException:In <parseDate>,a pa ActionListenter cannot be resolved to a type javax.servlet.jsp.jspexception无法解析为此类型 JAVA中报错i cannot be resolved to a variable javax.servlet.jsp.pagecontext 无法解析为类型 jsp+servlet跳转问题: Cannot call sendRedirect() after the respon R.id cannot be resolved cannot be resolved什么意识