JAVA下几个问题

1、Server MyEclipse Tomcat v8.5 was unable to start within 45 seconds. If the server requires more time

打开Workspace文件路径，而后修改以下图所示“servers.xml” 文件，而后修改“start-timeout”为一个较长时间1000.

 

 2、JSP页面报错：The superclass "javax.servlet.http.HttpServlet" was not found on the Java Build Path

右键项目名称，选择Java Build Path. 而后点击“Add Liberary”, 选择“Server Runtimes”.