NoSuchMethodException 使用反射与 Spring JPARespository 方法（例如：findByName）

Question

I'm trying implement multiple filters with JPA Query Methods offered by Spring Data JPA .

Dynamic filter eg: findByNameContainingCreatedAtBefore

(eg: findByName ) and I used Java Reflection to get a method from JPA Repository and invoke dynamically.

Method method = institutionRepository.getClass().getMethod("findByName", String.class);

But the above line throws NoSuchMethodException .

Are there any ways to fix the above issue?

Answer 1

I bet there is no findByName in your source code and you're expecting to see the method generated by the spring-data-jpa. This will not happen, because the method isn't added by spring to the repository itself, but to the proxy over that repository. That's why it has to be a bean - so that it can be wrapped by spring with a proxy to provide all the functionality.