从json文件加载spring-boot属性 [英] Load spring-boot properties from json file

问题描述

是否可以从.json文件加载spring-boot配置而不是.yaml或.properties？通过查看文档，这不是开箱即用的支持 - 我想知道它是否可能，如果是这样的话怎么会这样做？

Is it possible to load spring-boot config from a .json file as opposed to .yaml or .properties? From looking at the documentation, this isn't supported out of the box - I'm wondering if it's possible and if so how one would go about doing it?

推荐答案

春季引导方式：

@EnableAutoConfiguration
@Configuration
@PropertySource(value = { "classpath:/properties/config.default.json" }, factory=SpringBootTest.JsonLoader.class )
public class SpringBootTest extends SpringBootServletInitializer {

    @Bean
    public Object test(Environment e) {
        System.out.println(e.getProperty("test"));
        return new Object();
    }


    public static void main(String[] args) {
        SpringApplication.run(SpringBootTest.class);
    }

    public static class JsonLoader implements PropertySourceFactory {

        @Override
        public org.springframework.core.env.PropertySource<?> createPropertySource(String name,
                EncodedResource resource) throws IOException {
            Map readValue = new ObjectMapper().readValue(resource.getInputStream(), Map.class);
            return new MapPropertySource("json-source", readValue);
        }

    }
}

定义你的拥有 PropertySourceFactory 并通过 @PropertySource 注释将其挂钩。阅读资源，设置属性，在任何地方使用它们。

Define your own PropertySourceFactory and hook it in via the @PropertySource annotation. Read the resource, set the properties, use them anywhere.

唯一的问题是，如何翻译嵌套属性。 Spring的方法（顺便说一下，您可以将Json定义为属性的变量，请参阅： https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html ）
用于翻译嵌套属性：

Only thing is, how do you translate nested properties. The Spring way to do that (by the way you can define Json also as a variable for properties, see: https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html) is to translate nested properties as such:

{"test": { "test2" : "x" } }

成为：

test.test2.x

希望有所帮助，

Artur

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