@PropertySource和映射绑定问题

Question

我的yml配置文件有这个特定问题。我有一个多模块 maven 项目，如下所示：

app
 |-- core
 |-- web
 |-- app

我在项目中有这个配置文件core

@Configuration
@PropertySource("core-properties.yml")
public class CoreConfig {
}

而这个映射：

@Component
@ConfigurationProperties(prefix = "some.key.providers.by")
@Getter
@Setter
public class ProvidersByMarket {
  private Map<String, List<String>> market;
}

这是我的core-properties.yml

some.key.providers:
  p1: 'NAME1'
  p2: 'NAME2'
some.key.providers.by.market:
  de:
    - ${some.key.providers.p1}
    - ${some.key.providers.p2}
  gb:
    - ${some.key.providers.p1}

例如，当我通过配置文件激活加载文件时，将文件重命名为 application-core-properties.yml然后-Dspring.profiles.active=core-properties它确实有效，但是如果我尝试通过 @PropertySource("core-properties.yml") 加载文件时它不起作用，并且我收到以下错误：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-03-27 10:07:36.397 -ERROR 13474|| --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 
***************************
APPLICATION FAILED TO START
***************************
Description:
Failed to bind properties under 'some.key.providers.by.market' to java.util.Map<java.lang.String, java.util.List<java.lang.String>>:
    Reason: No converter found capable of converting from type [java.lang.String] to type [java.util.Map<java.lang.String, java.util.List<java.lang.String>>]
Action:
Update your application's configuration

Process finished with exit code 1

Answer 1

> Bacouse 你没有等效的属性 stracture，例

spring:
    profiles: test
name: test-YAML
environment: test
servers: 
    - www.abc.test.com
    - www.xyz.test.com
---
spring:
    profiles: prod
name: prod-YAML
environment: production
servers: 
    - www.abc.com
    - www.xyz.com

配置类应该是

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties
public class YAMLConfig {
    private String name;
    private String environment;
    private List<String> servers = new ArrayList<>();
    // standard getters and setters

Answer 2

我已经解决了实现以下PropertySourceFactory详见此处的问题

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;
import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.support.EncodedResource;
import org.springframework.core.io.support.PropertySourceFactory;
import org.springframework.lang.Nullable;
public class YamlPropertySourceFactory implements PropertySourceFactory {
    @Override
    public PropertySource<?> createPropertySource(@Nullable 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 ignoreResourceNotFound
            Throwable cause = e.getCause();
            if (cause instanceof FileNotFoundException)
                throw (FileNotFoundException) e.getCause();
            throw e;
        }
    }
}

Answer 3

我遇到了类似的问题，并找到了这样的解决方法：

diacritic:
  isEnabled: true
  chars: -> I wanted this to be parsed to map but it didn't work
    ą: a
    ł: l
    ę: e

到目前为止，我的解决方案：

diacritic:
  isEnabled: true
  chars[ą]: a           -> these ones could be parsed to Map<String, String>
  chars[ł]: l           
  chars[ę]: e