according to project's need,I download the resin and expore this open-source server the first time for me.below is some problem and may be with solved ways.
1.cache for IE.I don't konw intellij IDE make this trick or the resin.no matter I change the jsp or delete it,the page seem never change.after I change the struts-comfig.xml or the tiles.xml pointing to another jsp coping from the sick page,then I can do what I want and not restart the server.
2.the resin will create a dir named 'work' in the 'web-inf'.and when compile,the java file in the
'work' dir may be reported error.so I delete it.
3.Hibernate error.for associate relation,Tomcat doesn't check but Resign check strictly.this may be becaust of the jsp-compile way.
4.For intellij-IDE's  resin plug,it didn't compile before run just as Tomcat plug.so you must compile yourself if any class changed.
5.the most different between Tomcat and Resin is the JSTL compile.Resin will generate the fast-jstl code and Tomcat do nothing.Resin contains the jstl-11.jar.In my former  training demo,the company jar we used seems associate with the jstl-xx.jar,so I can't delete the jstl jar
from the demo lib.Then the demo run error when in Resin until close the fast-jstl.

resin.conf
 <web-app-default>
...
  <jsp fast-jstl='false'/>
....
 </web-app-default>

it also can set for a appointed web-app.

version:
intellij IDE: 6.0.1
Resin:resin-pro-3.0.21
DB: sql-server