SpringBoot 官方文档示例：(4)通过Listener获取应用的Readiness状态

package cn.edu.tju.component;

import org.springframework.boot.availability.AvailabilityChangeEvent;
import org.springframework.boot.availability.ReadinessState;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;
@Component
public class MyReadinessStateExporter {
    @EventListener
    public void onStateChange(AvailabilityChangeEvent<ReadinessState> event) {
        switch (event.getState()) {
            case ACCEPTING_TRAFFIC:
                System.out.println("accepting......");
                break;
            case REFUSING_TRAFFIC:
                System.out.println("refusing......");
                break;
        }
    }
}