Springboot中随时获取ApplicationContext,得到想要的bean

在springBoot启动类的main方法中写成

/**     * 启动嵌入式的Tomcat并初始化Spring环境     */    public static void main(String[] args) throws Exception {        ApplicationContext app = SpringApplication.run(WebApplication.class, args);        SpringUtil.setApplicationContext(app);        //SpringApplication.run(WebApplication.class, args);    }

创建工具类

package com.yssoft.fs.supervise.utils;import com.yssoft.fs.repository.entity.comm.EarlyWarningTask;import com.yssoft.fs.supervise.service.riskWarning.RiskWarningTaskService;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import javax.annotation.Resource;import java.util.List;public class SpringUtil  {    private static ApplicationContext applicationContext = null;// 非@import显式注入，@Component是必须的，且该类必须与main同包或子包    // 若非同包或子包，则需手动import 注入，有没有@Component都一样    // 可复制到Test同包测试    public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException {        if(SpringUtil.applicationContext == null){            SpringUtil.applicationContext  = applicationContext;        }        //查询所有预警任务,开启的预警任务自动开启        RiskWarningTaskService riskWarningTaskServiceStatic=applicationContext.getBean(RiskWarningTaskService.class);        List<EarlyWarningTask> earlyWarningTask = riskWarningTaskServiceStatic.findEarlyWarningTaskAll();        for (EarlyWarningTask warningTask : earlyWarningTask) {            //如果任务是打开的,可就开启任务            if("1".equals(warningTask.getStat())){                riskWarningTaskServiceStatic.editState("1",warningTask.getId().toString(),warningTask.getTitle());                riskWarningTaskServiceStatic.editState("0",warningTask.getId().toString(),warningTask.getTitle());            }        }    }    //获取applicationContext    public static ApplicationContext getApplicationContext() {        return applicationContext;    }    //通过name获取 Bean.    public static Object getBean(String name){        return getApplicationContext().getBean(name);    }    //通过class获取Bean.    public static <T> T getBean(Class<T> clazz){        return getApplicationContext().getBean(clazz);    }    //通过name,以及Clazz返回指定的Bean    public static <T> T getBean(String name,Class<T> clazz){        return getApplicationContext().getBean(name, clazz);    }}