How Can We Inject Beans In Spring? — Spring Interview Question

Answering Popular Spring Interview Questions

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Overview

In spring, beans can be injected using various methods, including constructor injection, setter injection, and field injection. Here’s a brief overview of each method:

𝟏. 𝐂𝐨𝐧𝐬𝐭𝐫𝐮𝐜𝐭𝐨𝐫 𝐈𝐧𝐣𝐞𝐜𝐭𝐢𝐨𝐧:
Constructor injection is done by providing dependencies through a constructor. This is the preferred way of dependency injection as it makes the dependencies explicit and the object immutable.

𝟐. 𝐒𝐞𝐭𝐭𝐞𝐫 𝐈𝐧𝐣𝐞𝐜𝐭𝐢𝐨𝐧:
Setter injection uses setter methods to inject dependencies. This method provides flexibility but makes the object mutable.