spring - Choice between Autowired and using static field

Question

I have a single configuration bean that has the app's configuration settings. I want to expose this bean to any java class in my application. Do i autowire it to every class that need the bean or do i set it to a static field in some global class to make it conveniently accessible to every class? Is autowiring reasonable/recommended for high turnover objects? In my case this would be some network events coming in multiples every second.

Answer 1

我在 AspectJ 编译时（或加载时）编织中使用了这种方法：

public final class Config {

    public static String oneParticularSetting() {
        return new ConfigHolder().oneParticularSetting;
    }

    @Configurable
    private static class ConfigHolder {
        @Value("${oneParticularSetting}")
        private String oneParticularSetting;
    }
}

自动装配开销/性能是您只需要测试的东西。

或者您可以重用 ConfigHolder 实例（考虑线程安全）。