如何将application.properties转换为application.yml

Question

document-contact={name:'joe',email:'[e-mail]'}

document-contact:
  name: 'joe'
  email: '[e-mail]'

    @Value("#{${document-contact}}")
    private Map<String, String> contact;

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consolidatedSwaggerDocumentationController': Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'document-contact' in value "#{${document-contact}}"
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:403) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1429) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE]

Answer 1

您的application.yml与您正在使用的application.properties不等效。

您没有读取单独的属性，而是只有一个名为document-contract(=${document-contract})的属性，该属性包含以下字符串：

"{name:'joe',email:'[e-mail]'}"

要将其转换为映射，需要使用Spring Expression Language（SpEL）。这就是为什么需要#{...}和${...}。

document-contract: "{name: 'joe', email: '[e-mail]'}"

@ConfigurationProperties(prefix = "app")
public class ApplicationProperties {
    private Map<String, String> documentContact;

    // Getters + Setters
}

app:
  document-contact:
    name: joe
    email: [e-mail]

app.document-contract.name=joe
app.document-contact.email=[e-mail]