1. Put the public configuration file in resources, the development environment, production environment and test environment in resources.dev, resources.test and resources.prod respectively

2. Set in pom.xml

<build>
        <resources>
            <resource>
                <!--Put the corresponding unique resources(dev,test,prod One of the three)Declaration, exclusion jsp file-->
                <directory>src/main/resources.${deploy.type}</directory>
                <excludes>
                    <exclude>*.jsp</exclude>
                </excludes>
            </resource>
            <resource>
                <!--Declare public resources-->
                <directory>src/main/resources</directory>
            </resource>
        </resources>
    </build>

    <!--Set up development, test and production environment respectively-->
    <profiles>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <deploy.type>dev</deploy.type>
            </properties>
        </profile>
        <profile>
            <id>test</id>
            <properties>
                <deploy.type>test</deploy.type>
            </properties>
        </profile>
        <profile>
            <id>prod</id>
            <properties>
                <deploy.type>prod</deploy.type>
            </properties>
        </profile>
    </profiles>

3. Using maven for multi environment packaging

-Dmaven.test.skip=true for test packaging and test compilation, - P is followed by the id of the required packaging environment, such as dev development environment and test test environment. If - P is not written, dev is the development environment by default

mvn clean package -Dmaven.test.skip=true -Ptest

4. When developing, combine local tomcat usage

• 1,intellij idea
  As shown in the figure, select the corresponding environment and run tomcat
  
• 2,eclipse
  Right click the project configuration, select maven, and enter the environment id you need, such as dev