测试代码：

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
@Component
public class LoadSequence implements InitializingBean, ApplicationContextAware {
    @Value("${DISTRIBUTED_LOCK}")
    private String code;


    public LoadSequence(){
        System.out.println("constructor has runned:" + code);
    }
    @PostConstruct
    public void postConstruct(){
        System.out.println("postConstruct has runned:" + code);
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        System.out.println("afterPropertiesSet has runned:" + code);
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        System.out.println("setApplicationContext has runned:" + code);
    }
}

结果：

constructor has runned:null
setApplicationContext has runned:false
postConstruct has runned:false
afterPropertiesSet has runned:false