spring-PropertiesFactoryBean可以从application.yml读取值吗？

我的项目具有一个依赖项,该依赖项需要一个可通过@Value批注读取的属性对象集：

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

为此,我正在使用以下命令：

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

这按预期工作.我的属性如下所示：

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

我正在为此项目使用Spring Boot,因此,我希望能够执行以下操作：

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

然后,我可以基于不同的配置文件配置base.url.

application.yml:

    base:
      url: http://localhost

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

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

我已经尝试这样做,但是它不起作用.解决方法是,我创建了三个不同的.properties文件(myprops.properties,myprops-staging.properties等),并使用三个不同的@Configuration类加载了它们.这可行,但看起来很麻烦.

@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？如果不是,是否有更简单的方法来使用JavaConfig配置属性？

解决方法:

我最终以编程方式完成了此操作,它使我可以找到想要的行为：

@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;
}

标签：spring-java-config,spring-boot,spring
来源： https://codeday.me/bug/20191122/2057544.html