PropertiesFactoryBean可以从Application.yml读取值吗？

Question

我的项目有一个依赖项，它需要一个可以由@value注释读取的set a properties对象：

@Value("#{myProps['property.1']}")

为了在JavaConfig中实现这一点，我使用了以下内容：

@Bean(name="myProps")
public static PropertiesFactoryBean mapper() {
    PropertiesFactoryBean bean = new PropertiesFactoryBean();
    bean.setLocation(new ClassPathResource("myprops.properties"));
    return bean;
}

property.1=http://localhost/foo/bar
property.2=http://localhost/bar/baz
property.3=http://localhost/foo/baz

myprops.properties:
    property.1=${base.url}/foo/bar
    property.2=${base.url}/bar/baz
    property.3=${base.url}/foo/baz

application.yml:

    base:
      url: http://localhost

    ---
    spring:
      profiles: staging
    base:
      url: http://staging

    ---
    spring:
      profiles: production
    base:
      url: http://production

@Configuration
public class DefaultConfiguration {

    @Bean(name="myProps")
    public static PropertiesFactoryBean mapper() {
        PropertiesFactoryBean bean = new PropertiesFactoryBean();
        bean.setLocation(new ClassPathResource("myprops.properties"));
        return bean;
    }
}

@Configuration
@Profile("staging")
public class StagingConfiguration {

    @Bean(name="myProps")
    public static PropertiesFactoryBean mapper() {
        PropertiesFactoryBean bean = new PropertiesFactoryBean();
        bean.setLocation(new ClassPathResource("myprops-staging.properties"));
        return bean;
    }
}

@Configuration
@Profile("production")
public class ProductionConfiguration {

    @Bean(name="myProps")
    public static PropertiesFactoryBean mapper() {
        PropertiesFactoryBean bean = new PropertiesFactoryBean();
        bean.setLocation(new ClassPathResource("myprops-production.properties"));
        return bean;
    }
}

是否可以将我的PropertiesFactoryBean配置为从Application.yml读取值？如果没有，是否有更简单的方法来使用JavaConfig配置属性？

Answer 1

我最后以编程方式完成了这一操作,它给出了我所要寻找的行为：

@Value("${base.url}")
private String baseUrl;

@Bean(name = "myProps")
public PropertiesFactoryBean mapper() throws IOException {
    PropertiesFactoryBean bean = new PropertiesFactoryBean();
    bean.setLocation(new ClassPathResource("myprops.properties"));
    bean.afterPropertiesSet();

    // replace ${base.url} in values
    Properties props = bean.getObject();
    Enumeration names = props.propertyNames();

    while (names.hasMoreElements()) {
        String name = names.nextElement().toString();
        String value = props.getProperty(name);
        if (value.contains("${base.url}")) {
            props.setProperty(name, value.replace("${base.url}", baseUrl));
        }
    }

    bean.setLocalOverride(true);
    bean.setProperties(props);
    bean.afterPropertiesSet();

    if (log.isDebugEnabled()) {
        log.debug("Base URL: " + baseUrl);
    }

    return bean;
}