Autowired注入静态变量Bean

方式1：使用@Autowired 构造方法

@Component
public class StaticServiceBean {
    private static ServiceBean serviceBean;
    @Autowired
    public StaticServiceBean(ServiceBean serviceBean) {
        StaticServiceBean.serviceBean = serviceBean;
    }
    public static void call() {
        serviceBean.toString();
    }
    public static ServiceBean getServiceBean() {
        return serviceBean;
    }
}

方式2：使用@Autowired Setter方法

@Component
public class StaticServiceBean {
    private static ServiceBean serviceBean;
    public static ServiceBean getServiceBean() {
        return serviceBean;
    }
    @Autowired
    public static void setServiceBean(ServiceBean serviceBean) {
        StaticServiceBean.serviceBean = serviceBean;
    }
}

方式3：使用ApplicationContextWare

@Component
public class ServiceHolder implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }
    public static ServiceBean getServiceBean() {
        return applicationContext.getBean(ServiceBean.class);
    }
}

方式4：使用@Autowired+@PostContruct

@Component
public class StaticServiceBean {
    private static ServiceBean staticServiceBean;
    @Autowired
    private ServiceBean serviceBean;
    @PostConstruct
    public void init() {
        StaticServiceBean.staticServiceBean = serviceBean;
    }
}