>> What does Spring offer you there that you can't do with plain old Java? Well nothing. Since Spring it written in Java, anyone else using Java can do all of

>> What does Spring offer you there that you can't do with plain old Java? Well nothing. Since Spring it written in Java, anyone else using Java can do all of those things. The things is Spring already does all these things and it does them well. It's well tested and well supported. Most people don't want to do all of this from scratch. So they need a framework anyways. So they choose Spring because it's the leading framework in Java world. There are a lot of people who already know Spring and can become productive in a Spring codebase fairly quickly.