The command line specifies the environment when the SpringBoot project deploys the JAR package

Write configuration parameters (such as port numbers, database addresses) for different environments (test, production) in their own files.

1. Create configuration files for each environment

Application -{profile}. Properties Profile can be dev,prod,preCopy the code

2. After the environment configuration is created, add the following code to the application.properties project

# default test environment dev spring.profiles. Active =devCopy the code

3, deployment,

As configured above, the default Jar package is for the test environment. If you need to switch, append –spring.profiles. Active to the start command