title: what is the best way to save or update or delete collection of entities using spring data jpa?
body: <p>I have an entity Employee. 
  For example: 
  I have saved few records into database like below:</p>
  
  <pre><code>employeeRepository.save(employees);
  </code></pre>
  
  <p>In next request, I would like to update few saved entities and delete few saved entities and create few entities newly. </p>
  
  <p>Please let me know the easy way to do it in Spring data JPA.</p>