自动装配环境为空 [英] Autowired Environment is null

问题描述

我在将环境连接到我的 Spring 项目时遇到问题.在这个班

I have an issue with connecting environment to my Spring project. In this class

@Configuration
@ComponentScan(basePackages = "my.pack.offer.*")
@PropertySource("classpath:OfferService.properties")
public class PropertiesUtil {
    @Autowired
    private Environment environment;



    @Bean
    public String load(String propertyName)
    {
        return environment.getRequiredProperty(propertyName);
    }
}

环境始终为空.

推荐答案

自动装配发生在 load() 被调用之后(出于某种原因).

Autowiring happens later than load() is called (for some reason).

一种解决方法是实现 EnvironmentAware 并依赖 Spring 调用 setEnvironment() 方法:

A workaround is to implement EnvironmentAware and rely on Spring calling setEnvironment() method:

@Configuration
@ComponentScan(basePackages = "my.pack.offer.*")
@PropertySource("classpath:OfferService.properties")
public class PropertiesUtil implements EnvironmentAware {
    private Environment environment;

    @Override
    public void setEnvironment(final Environment environment) {
        this.environment = environment;
    }

    @Bean
    public String load(String propertyName)
    {
        return environment.getRequiredProperty(propertyName);
    }
}

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