运行JSP等页面时出现：attribute name is preceded by whitespace Type...[作者空间]
错误提示： The content of element type "web-app" must match "(...[作者空间]
创建maven项目时报错 错误提示： Could not calculate build plan: Plugin...[作者空间]
报错信息: The superclass "javax.servlet.http.HttpServlet" was...[作者空间]
