Question

我有一个名为provider.xml的spring文件

<context:property-placeholder location="classpath:META-INF/spring

/${build.profile.id}/config.properties" />

我在META-INF / spring / ws1中有两个不同的config.properties，另一个在META-INF / spring / ws2中。

这是我pom.xml的一部分

<profiles>
    <profile>
        <id>ws1</id>
        <properties>
            <build.profile.id>ws1</build.profile.id>
        </properties>
    </profile>
    <profile>
        <id>ws2</id>
        <properties>
            <build.profile.id>ws2</build.profile.id>
        </properties>
    </profile>
</profiles>

我收到此错误：

Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanInitializationException: Could not load properties; nested exception is java.io.FileNotFoundException: class path resource [META-INF/spring/${build.profile.id}/config.properties] cannot be opened because it does not exist

但是，如果我尝试不使用变量来读取它，那是可行的：

 <context:property-placeholder location="classpath:META-INF/spring/ws1/config.properties" />

如何在context：property-placeholder中将其读取为变量？

将这段代码添加到provider.xml之后

<bean id="propertyPlaceholderConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
<property name="searchSystemEnvironment" value="true" />
</bean>

我收到此错误：

Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'org.springframework.context.support.PropertySourcesPlaceholderConfigurer#0' defined in null: Could not resolve placeholder 'build.profile.id' in value "classpath:META-INF/spring/${build.profile.id}/config.properties"; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'build.profile.id' in value "classpath:META-INF/spring/${build.profile.id}/config.properties"
    at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:223)
    at org.springframework.beans.factory.config.PropertyPlaceholderConfigurer.processProperties(PropertyPlaceholderConfigurer.java:222)
    at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:86)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:283)

Answer 1

如果您询问如何设置运行时使用哪个配置文件，则将以下内容添加到运行命令中，如下所示：

java -jar -Dspring.profiles.active=ws1 myjar.jar

您还可以在设置中设置默认配置文件，如下所示：

<profile>
    <id>ws1</id>
    <activation>
       <activeByDefault>true</activeByDefault>
    </activation>
    <properties>
        <build.profile.id>ws1</build.profile.id>
    </properties>
</profile>

在pom中，您需要将属性设置为默认值，然后可以在运行时将其覆盖：

<properties>
    <build.profile.id>ws1</build.profile.id>
    ...
</properties>

Answer 2

我解决了这个问题，所以：我像这样使用PropertySourcesPlaceholderConfigurer Bean代替PropertyPlaceholderConfigurer：

<bean class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>classpath:properties/application.properties</value>
        </list>
    </property>
    <property name="ignoreUnresolvablePlaceholders" value="true"/>
</bean>

我删除了：

<context:property-placeholder location="classpath:META-INF/spring/ws1/config.properties" />

初始化上下文：属性占位符取决于Maven配置文件

2 个答案: