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What is dependency injection?
Spring uses dependency injection pattern. Can someone show a simple example of this pattern?
I heard there is another pattern called service locator, which one is better?
Answer
Service locator is a J2EE "Core Patterns" idiom.
Let's define "better" before we debate it, shall we?
They aren't really competitors, IMO. Not every dependency happens over a network. Spring can do remoting and proxying, but that's not the sum of all dependencies.
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