title: spring mvc dao and service bean mapping
body: <p>I am new to Spring and hibernate. 
  I am trying to learn the best practices and design methodoligies in j2ee apps. </p>
  
  <p>I have a managed to create a basic spring mvc web app. now lookin for that 
  - how should i map my service beans to dao beans or should just use dao beans only. 
  - Is there any need to make DAO classes singleton
  - If i use same dao bean for the jsp, then e.g. onSubmit if I have to enter data on multiple tables (dao beans) then how would I do that. 
  1 service bean to more than 1 dao beans??</p>
  
  <p>and any refrence material on designing good web app using spring hibernate would appreciated ;)</p>
  
  <p>thanks </p>