Spring Data Query Methods Demo

Use Spring Data to generate database query methods by method names.

What for?

Spring Data repositories implement a strategy for generating database query methods from the method's names themselves.

Spring Data JpaRepository:

interface JpaRepository<T, ID extends Serializable>

Create an interface repository for your model by extending JpaRepository like this:

interface AddressRepository extends JpaRepository<Address, Long>

In your interface you can add method signatures following Spring Data Query Methods' strategy:

Set<Customer> findByBirthdayBetween(LocalDate startDate, LocalDate endDate);

Set<Customer> findByAddress_ZipCode(String zipCode);

By following this strategy, Spring Data will generate implementation for these methods and you will be able to use them without having to write a single JPQL (Java Persistence Query Language) line nor the worst case, native SQL.

Check tests in this project for a better comprehension.

See this blog post for a complete guidance on implementing Spring Data Query Methods.

See Spring Data documentation for further details.

Run

• Clone
• mvn test