Generally speaking , Project development is divided into development environment （dev） 、 Test environment （test） 、 Preproduction environment （pre） 、 Production environment （prod）. There are some differences in configuration between different environments , We switch according to different deployment environment files , Let's talk about how to configure different environments .

Configuration file preparation

Prepare the corresponding application-*.properties file .

• application.properties: Common configuration
• application-dev.properties: Development environment configuration
• application-test.properties: Test environment configuration
• application-prod.properties: Production environment configuration

pom.xml To configure

<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.yml</include>
<include>**/*.xml</include>
</includes>
<!-- Whether to replace @xx@ It means maven properties Property value -->
<filtering>true</filtering>
</resource>
</resources>

application.properties

# At this point, the configuration is the development environment
spring.profiles.active=dev
# The test environment is configured at this time
spring.profiles.active=test
# At this point, the configuration is the production environment
spring.profiles.active=prod

The above configuration requires us to modify the corresponding values in different environments , This is very inconvenient , At this point, we can configure it by variables , Now let's make some changes .

pom.xml Add

<profiles>
<!-- development environment -->
<profile>
<id>dev</id>
<properties>
<env>dev</env>
</properties>
</profile>
<!-- Test environment -->
<profile>
<id>test</id>
<properties>
<env>test</env>
</properties>
</profile>
<!-- Production environment -->
<profile>
<id>prod</id>
<properties>
<env>prod</env>
</properties>
</profile>
</profiles>

application.properties It is amended as follows

# At this point through env To distinguish between different environments
spring.profiles.active=@env@

At this time we are IDEA On the right you see the following ：

Here we can choose the corresponding environment

Now we can switch Profiles To switch the environment . But in this case, it can only be started by running the startup class , like this ：

Only in this way can it be applied to Profiles Selected value .

spring-boot:run Mode start

It can't be applied to IDEA On the right Profiles Environmental value of .

• mvn spring-boot:run -P dev

We need to add the specified environment after the command , like this ：mvn spring-boot:run -P dev Specified in dev Start up in the environment of , among -P Appoint pom.xml Corresponding profiles Value . here application.properties The configuration file is no longer valid .

springboot1.x start-up

• mvn spring-boot:run -Drun.profiles=dev

springboot2.x start-up

• mvn spring-boot:run -Dspring-boot.run.profiles=test

function jar package

java -jar -Dspring.profiles.active=test demo.jar
# perhaps
java -jar --spring.profiles.active=test demo.jar