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You’ll build a Spring application.

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Create a new controller for your Spring application:

src/main/java/hello/GreetingController.java

Although it is possible to package this service as a traditional WAR file for deployment to an external application server, the simpler approach demonstrated below creates a standalone application. You package everything in a single, executable JAR file, driven by a good old Java main() method. Along the way, you use Spring’s support for embedding the Tomcat servlet container as the HTTP runtime, instead of deploying to an external instance.

src/main/java/hello/Application.java

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Logging output is displayed. The service should be up and running within a few seconds.

Now that the application is running, you can test it.

Congratulations! You’ve just developed a Spring application!

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