关于tomcat部署war包，同时想要将目录设置为默认目录的解决办法。

What you can do is the following;

Add a file called ROOT.xml in /conf/Catalina/localhost/

This ROOT.xml will override the default settings for the root context of the tomcat installation for that engine and host (Catalina and localhost).

Enter the following to the ROOT.xml file;

<Context 
  docBase="<yourApp>" 
  path="" 
  reloadable="true" 
/> 

Here,<yourApp> is the name of, well, your app.. :)

And there you go, your application is now the default application and will show up on http://localhost:8080

However, there is one side effect; your application will be loaded twice. Once for localhost:8080 and once for localhost:8080/yourApp. To fix this you can put your application OUTSIDE /webapps and use a relative or absolute path in the ROOT.xml’s docBase tag. Something like this;

  docBase="/opt/mywebapps/<yourApp>" 
  path="" 
  reloadable="true" 
/>

And then it should be all OK!

摘抄自stackoverflow:
链接：https://stackoverflow.com/questions/7276989/how-to-set-the-context-path-of-a-web-application-in-tomcat-7-0