How to use ORMLite with Spring

I want to use ORMLite for my RESTful service which is created by using Spring. For now it is a simple project based on this tutorial. I found this for integrating ORMLite in Spring but my project doesn't have applicationContext.xml. If I create it how can I tell my program to use it? Also if I succeed integrating ORMLite, what will happen if two threads want to write in a same table? What should I do? Sorry if my questions are dumb, I'm just new at Spring.