We know that under normal circumstances, a bean of spring depends on other resources, such as properties or other beans. You can use @ Value or @ Autowired directly. These two annotations are equivalent to the property nodes when the spring application context xml file defines beans. Equivalent to calling the set method of each property.

    <bean id="person" class="com.myapp.core.spel.xml.Person">  
        <property name="book" value="book" />  
        <property name="bookName" value="#{book.name}"/>  
    </bean>

However, when a static method in a java class needs to refer to a spring resource, we need to define static attributes, and then implement the static attribute injection by displaying the set methods that declare them (note that this set method is non-static).
See the following example code, where the set method of the dingdingReceiverMan property injects a configuration "monitor ﹣ log. Dinging. Receiverman" through the @ Value annotation; the set method of the redisutil property injects a bean through the @ Autowired annotation - the class "redisutil" decorated by the @ Component.

@Component
@Slf4j
public class SendWarningMessage {

    private static String dingdingReceiverMan;
    private static RedisUtil redisUtil;
    static final String ACC_MONITOR_REDIS_KEY_PREFIX = "ACC_MONITOR_";

    @Value("${monitor_log.dingding.receiverMan}")
    public void setDingdingReceiverMan(String value) {
        dingdingReceiverMan = value;
    }
    
    @Autowired
    public void setRedisUtil(RedisUtil value) {
        redisUtil = value;
    }
    
    public static void sendMsg(String mobile, String msg) {
    
        ...
        
        String redisKey = ACC_MONITOR_REDIS_KEY_PREFIX + MD5Util.md5(warningMsg);
        if (redisUtil.get(redisKey) != null) {
            log.info("The mobile phone number has been sent recently. In order to prevent frequent sending, it will not be sent this time. {}", mobile);
        } else {

            log.info("Messages sent:{}", warningMsg);
            DingdingUtil.sendDingDing(dingdingReceiverMan, warningMsg);
            redisUtil.set(redisKey, warningMsg, 5 * 60);

        }
        
        ...
        
    }
}