用maven profile 实现环境配置切换

 1、创建一个maven 项目webtest,pom文件如下。resources文件加下创建三个配置文件的目录，prod(生产环境)，test(测试环境)，dev(开发环境)。分别在这三个目录下添加配置文件

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.yb</groupId>
  <artifactId>webtest</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>webtest Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <finalName>webtest</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>

    </pluginManagement>
    <resources>
      <resource>

        <directory>src/main/resources/</directory>
        <!--打包时先排除掉这三个文件夹-->
        <excludes>
          <exclude>dev/*</exclude>
          <exclude>prod/*</exclude>
          <exclude>test/*</exclude>
        </excludes>
        <includes>

        </includes>
      </resource>
      <resource>
        <!--这里是关键！根据不同的环境，把对应文件夹里的文件打包 -->
        <directory>src/main/resources/${profiles.active}</directory>
      </resource>
    </resources>
  </build>
  <profiles>
    <profile>
      <!--不同环境profile的唯一id-->
      <id>dev</id>
      <properties>
        <profiles.active>dev</profiles.active>
      </properties>
    </profile>
    <profile>
      <id>prod</id>
      <properties>
        <profiles.active>prod</profiles.active>
      </properties>
      <!--activation 用来指定激活方式 可以根据jdk环境 环境变量 文件的存在或缺失等-->
      <activation>
        <!--表示默认激活-->
        <activeByDefault>true</activeByDefault>
      </activation>
    </profile>
    <profile>
      <id>test</id>
      <properties>
        <profiles.active>test</profiles.active>
      </properties>
    </profile>
  </profiles>

</project>

2、在idea中配置maven命令，clean package -Ptest .打包出来的项目会用test文件下的配置文件。