Chapter 5. Implementing Database Persistence: "This is Part 5 of a step-by-step account of how to develop a web application from scratch using the Spring Framework. In Part 1 we configured the environment and set up a basic application. In Part 2 we refined the application that we will build upon. Part 3 added all the business logic and unit tests and Part 4 developed the web interface. It is now time to introduce database persistence. We saw in the earlier parts how we loaded some business objects using bean definitions in a configuration file. It is obvious that this would never work in real life – whenever we re-start the server we are back to the original prices. We need to add code to actually persist these changes to a database."
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