How to Run a Spring Boot JAR (Fat/Uber JAR Explained)

Run a Spring Boot executable JAR with java -jar, understand the fat/uber JAR layout (BOOT-INF, nested libs), pass config, and inspect what's bundled inside — in the browser.

Step 1: Run the JAR

Step 2: Pass Configuration and Arguments

What Makes a Spring Boot JAR a "Fat JAR"

Inspect What's Bundled Inside

Summary