springboot如何通过@PropertySource加载自定义yml文件 springboot如何通过@PropertySource加

@PropertySource加载自定义yml文件
@PropertySource注解对于yml的支持

@PropertySource加载自定义yml文件 【springboot如何通过@PropertySource加载自定义yml文件】使用@PropertySource默认加载的是.xml或者 .properties文件，因为在注解源码默认使用的是DefaultPropertySourceFactory实现处理文件内容，spring使用ResourcePropertySource从Resource构建Properties传给Spring。

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系统的应用，比如加载自定义的文件，将配置文件内容存储在内存，如下：

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那么加载一个自定义的.yml文件，就需要自定义实现ResourcePropertySource来处理yml文件的类

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public class YamlPropertySourceFactory implements PropertySourceFactory {@Overridepublic PropertySource createPropertySource(String name, EncodedResource resource) throws IOException {Properties propertiesFromYaml = loadYamlIntoProperties(resource); String sourceName = name != null ? name : resource.getResource().getFilename(); return new PropertiesPropertySource(sourceName, propertiesFromYaml); }private Properties loadYamlIntoProperties(EncodedResource resource) throws FileNotFoundException {try {YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean(); factory.setResources(resource.getResource()); factory.afterPropertiesSet(); return factory.getObject(); } catch (IllegalStateException e) {// for ignoreResourceNotFoundThrowable cause = e.getCause(); if (cause instanceof FileNotFoundException)throw (FileNotFoundException) e.getCause(); throw e; }}}

@PropertySource注解对于yml的支持 @PropertySource只对properties文件可以进行加载，但对于yml或者yaml不能支持。
追寻源码。

public class DefaultPropertySourceFactory implements PropertySourceFactory {public DefaultPropertySourceFactory() {}public PropertySource createPropertySource(String name, EncodedResource resource) throws IOException {return name != null ? new ResourcePropertySource(name, resource) : new ResourcePropertySource(resource); }}

我们只需要继承DefaultPropertySourceFactory类并修改就可以了。

public class YamlConfigFactory extends DefaultPropertySourceFactory {@Overridepublic PropertySource createPropertySource(String name, EncodedResource resource) throws IOException {String sourceName = name != null ? name : resource.getResource().getFilename(); if (!resource.getResource().exists()) {return new PropertiesPropertySource(sourceName, new Properties()); } else if (sourceName.endsWith(".yml") || sourceName.endsWith(".yaml")) {Properties propertiesFromYaml = loadYml(resource); return new PropertiesPropertySource(sourceName, propertiesFromYaml); } else {return super.createPropertySource(name, resource); }}private Properties loadYml(EncodedResource resource) throws IOException {YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean(); factory.setResources(resource.getResource()); factory.afterPropertiesSet(); return factory.getObject(); }}

@PropertySource(value = https://www.it610.com/article/{"classpath:dog.yml"},factory = YamlConfigFactory.class)@Component@ConfigurationProperties(prefix = "dog")public class Dog {private String name ; private String age ;

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。