SpringBoot specified environment and configuration file startup under IDEA

1. SpringBoot startup under idea: specify the configuration file

The Springboot project has the following configuration files

Main configuration file application.yml,

Test environment: application-test.yml

Production environment: application-pro.yml

Development environment: application-dev.yml

1.1. Configuration file specifies the environment

在主配置文件里指定实际使用的配置文件
spring:
    profiles:
        active: dev

1.2. The project has been packaged and run configuration

You need to ensure that the project has been packaged as a jar package: springboot-demo.jar, and specify other configuration files application-dev.yml in the project to start the project.

java -jar springboot-demo.jar --spring.profiles.active=dev

# 另一种启动命令(上一种启命令失效时, 用以下这种, 或就以这种)

java -jar -Dspring.profiles.active=dev springboot-demo.jar

1.3. Start the springboot project based on (3) on the Linux server

jar running mode

java -jar xx.jar --spring.profiles.active=dev

Example

java -jar -Dspring.profiles.active=test springboot-demo.jar

Startup without displaying log printing

nohup java -jar -Dspring.profiles.active=test springboot-demo.jar &

2. During the development process, the idea specifies a configuration file in a certain environment to start the project.

Method 1: Multiple configuration files. When starting the project, you need to modify the configuration information in the upper right corner, as shown below.

Select Configuration —> Environment —> Program arguments (main method startup mode: priority is higher than activation in the configuration file)

// Add --spring.profiles.active=dev in IDE Arguments

 Add configuration

 

 

 Configure startup parameters 

--spring.profiles.active=test

 

Method 3: Select Configuration ——》Environment ——》VM options (JVM startup mode) and enter the following code:

-Dspring.profiles.active=dev

 

3. Which one should I choose between -Dspring.profiles.active=dev and --spring.profiles.active=dev?

        The main difference between setting system properties using the -D parameter and setting command line parameters using the -- parameter is that setting system properties using the -D parameter can be used with any Java application and can set any system property, whereas using the -- parameter The method of setting command line parameters is unique to Spring Boot and can only be used to set the configuration file of a Spring Boot application.

        In addition, when using the -D parameter to set system properties, you need to connect the property name and property value with the equal sign =, and when using the -- parameter to set command line parameters, you need to add a -- prefix before the property name.
Setting system properties using the -D parameter and setting command line parameters using the -- parameter are both valid ways of setting up a Spring Boot application's configuration files. You can choose one of the methods to set environment variables according to actual needs.

• System properties set using the -D parameter can be changed dynamically while the program is running;
• Command line parameters set using the -- parameter cannot be changed dynamically;
• When starting the Spring-Boot project, it is recommended to use --, such as --spring.profiles.active=dev