Spring Boot Environment Conversion Bug Demo

Demonstrates the Spring Boot environment conversion bug: spring-projects/spring-boot#9246

How to Reproduce

1. Clone this repository

   git clone https://github.com/EthanRubinson/SpringBootEnvConversionBugDemo

2. Navigate to the project

   cd SpringBootEnvConversionBugDemo

3. Build it

   mvn clean install

4. Run it

   java -jar target/demo-0.0.1-SNAPSHOT.jar

App startup will fail because our custom conversion service is no longer associated with the environemnt and, consequently, there is no way to convert our custom String value to a URL.

To See the Expected Behavior

1. Remove the entry from the application.properties file (or just remove the whole file)

   rm src/main/resources/application.properties

2. Build it

   mvn clean install

3. Run it

   java -jar target/demo-0.0.1-SNAPSHOT.jar

The app will startup successfully and you will see "http://spring.io" printed in the console.