Additional Notes
How does Spring handle multiple beans of the same type being injected?
Track: Java
Topic: Dependency Injection
Focus: Constructor vs Field Injection
Java: Constructor vs Field Injection
Answer
Spring uses type and @Qualifier annotations to resolve multiple beans.
When multiple beans of the same type exist, Spring resolves the injection by using @Qualifier annotations to specify which bean to inject. Without qualifiers, it will throw a NoUniqueBeanDefinitionException. For instance, if two payment processors are available, specifying @Qualifier allows you to choose which one to inject.
When multiple beans of the same type exist, Spring resolves the injection by using @Qualifier annotations to specify which bean to inject. Without qualifiers, it will throw a NoUniqueBeanDefinitionException. For instance, if two payment processors are available, specifying @Qualifier allows you to choose which one to inject.
Topics: Constructor vs Field Injection Dependency Injection Java