如何在类级别变量中使用Spring @Value注释

@Component
public class MyClass {

    private static String myValue;

    @Value("${my.value}")
    public void setMyValue(String value) {
        myValue = value;
    }
}

@Component
public class MyClass {

    private static String myValue;

    @Value("${my.value}")
    private String tempValue;

    @PostConstruct
    public void init() {
        myValue = tempValue;
    }
}

public class MyContextInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    @Override
    public void initialize(ConfigurableApplicationContext applicationContext) {
        ConfigurableEnvironment environment = applicationContext.getEnvironment();
        String myValue = environment.getProperty("my.value");
        MyClass.myValue = myValue;
    }
}

<context:annotation-config/>
<context:component-scan base-package="com.example"/>
<context:property-placeholder location="classpath:application.properties"/>
<bean class="com.example.MyContextInitializer"/>