pom.xml中的配置无法被yaml读取

问题描述

项目中指定了多个profiles, 但是application.yaml读取报错，报错信息如下

Standard Commons Logging discovery in action with spring-jcl: please remove commons-logging.jar from classpath in order to avoid potential conflicts
12:41:52.325 [main] ERROR org.springframework.boot.SpringApplication -- Application run failed
org.yaml.snakeyaml.scanner.ScannerException: while scanning for the next token
found character '@' that cannot start any token. (Do not use @ for indentation)
 in 'reader', line 3, column 13:
        active: @env@
                ^

	at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:445)
	at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:238)
	at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingValue.produce(ParserImpl.java:669)
	at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:161)
	at org.yaml.snakeyaml.comments.CommentEventsCollector$1.peek(CommentEventsCollector.java:57)
	at org.yaml.snakeyaml.comments.CommentEventsCollector$1.peek(CommentEventsCollector.java:43)

profiles配置如下

<profiles>
    <profile>
        <id>dev</id>
        <properties>
            <env>dev</env>
        </properties>
        <activation>
            <activeByDefault>true</activeByDefault>
        </activation>
    </profile>
    <profile>
        <id>test</id>
        <properties>
            <env>test</env>
        </properties>
    </profile>
    <profile>
        <id>prod</id>
        <properties>
            <env>prod</env>
        </properties>
    </profile>
</profiles>

application.yaml中的配置

spring:
  profiles:
    active: @env@

无论怎么切换profiles，或者刷新maven项目，一直报这个错误。

之前的项目也使用了这个写法，但是没有这个问题

解决方案

在Maven中添加如下配置

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <!--开启过滤，用指定的参数替换directory下的文件中的参数-->
            <filtering>true</filtering>
        </resource>
    </resources>
</build>

如果继承了spring-boot-parent就不会有这个问题

原因在于，spring-boot-parent中也有这个maven配置，默认将resources下的文件过滤掉，防止maven对文件占位符进行修改