使用通配符使用@PropertySource (SpringBoot) 读取多个属性文件 [英] Reading multiple properties files with @PropertySource (SpringBoot)using wildcard character

问题描述

我想从特定位置读取多个属性文件，例如 C:\config.我正在使用 @PropertySource 注释.有没有办法在 Springboot 中使用一些通配符读取这些文件，例如 (*.properties).所以我打算实现的是这样的

I want to read multiples properties files from a specific location, say C:\config. I'm taking help of @PropertySource annotation. Is there a way to read these files in Springboot using some wildcard character e.g (*.properties). So what I intended to achieve is something like this

@PropertySource("*.properties") })
public class SomeClass{
}

如果没有，有没有办法以编程方式创建这些 @PropertySource("foo.properties") 或 @PropertySource("bar.properties") 并将它们提供给 @PropertySources 以便我可以实现这一目标.

If not, Is there a way to create these @PropertySource("foo.properties") or @PropertySource("bar.properties") programmatically and provide them to @PropertySources so that I can achieve this.

@PropertySources({
   @PropertySource("foo.properties"),
   @PropertySource("bar.properties")
})

我想实现它的原因是将来如果我必须注入另一个属性，比如 future.properties，我不必修改 Java 文件.

The reason I want to achieve it so in future if I have to inject another property say future.properties, I do not have to modify the Java files.

推荐答案

PropertySource

注解为将 PropertySource 添加到 Spring 的环境提供了一种方便的声明机制.与@Configuration 类结合使用.

Annotation providing a convenient and declarative mechanism for adding a PropertySource to Spring's Environment. To be used in conjunction with @Configuration classes.

支持传统和基于 XML 的属性文件格式 — 例如，classpath:/com/myco/app.properties"或file:/path/to/file.xml".

Both traditional and XML-based properties file formats are supported — for example, "classpath:/com/myco/app.properties" or "file:/path/to/file.xml".

不允许使用资源位置通配符(例如 **/*.properties)；每个位置必须评估为恰好一个 .properties 资源.

Resource location wildcards (e.g. **/*.properties) are not permitted; each location must evaluate to exactly one .properties resource.

${...} 占位符将针对已在环境中注册的任何/所有属性源进行解析.

${...} placeholders will be resolved against any/all property sources already registered with the Environment.

@Configuration
@PropertySources({
    @PropertySource("classpath:test.properties"),
    @PropertySource("classpath:test1.properties")
})
public class TestConfig {
    //...
}

您可以使用通配符.但您需要考虑弃用 PropertyPlaceholderConfigurer.

You can using to wildcard character. but you need to consider PropertyPlaceholderConfigurer Deprecated.

PropertyPlaceholderConfigurer

已弃用.自 5.2 起；使用 org.springframework.context.support.PropertySourcesPlaceholderConfigurer 代替，它通过利用 Environment 和 PropertySource 机制更加灵活.

Deprecated. as of 5.2; use org.springframework.context.support.PropertySourcesPlaceholderConfigurer instead which is more flexible through taking advantage of the Environment and PropertySource mechanisms.

@Configuration
public class PropertyConfig {

    @Bean
    public PropertyPlaceholderConfigurer getPropertyPlaceholderConfigurer()
            throws IOException {
        PropertyPlaceholderConfigurer propertyConfigurer = new PropertyPlaceholderConfigurer();
        propertyConfigurer.setLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/test/*.properties"));

        return propertyConfigurer;
    }

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