CRUD(Create, Read, Update, Delete) operations form the foundations of most enterprise applications and in Java there are various APIs designed to deal with such operations. This post explores CRUD operations in the context of Google App Engine using the JPA(Java Peristence API), JDO(Java Data Objects) and another low level API provided by the Google App Engine.In addition to relying on Spring MVC framework to illustrate these operations. Read the entire post at the Digital Sanctum blog entitled 'Google App Engine for Java: CRUD Operations with JDO and Spring MVC': http://www.digitalsanctum.com/2009/07/02/google-app-engine-for-java-crud-with-jdo-spring-mvc/