框架搭好之后，启动tomcat
出现：

 [2016-01-08 05:20:14,898] Artifact demo0:war exploded: Artifact is being deployed, please wait...
一月 08, 2016 5:20:15 下午 org.apache.catalina.core.StandardContext startInternal
严重: One or more listeners failed to start. Full details will be found in the appropriate container log file
一月 08, 2016 5:20:15 下午 org.apache.catalina.core.StandardContext startInternal
严重: Context [/test] startup failed due to previous errors
[2016-01-08 05:20:15,556] Artifact demo0:war exploded: Error during artifact deployment. See server log for details.

访问项目出现404错误

查了很久，也没发现是哪错了，错误信息太少了，求遇到过该问题的大牛指导下啊