Only no-arg methods may be annotated with @Scheduled报错

谁借莪１个温暖的怀抱￠ 2023-02-22 13:51 61阅读 0赞

## 问题背景 ##

今天在弄一个手工爬虫框架的时候，由于有个功能如下：

*  在列表界面点击抓取，进行手工抓取
 *  后台根据application.yml设置的定时任务自动触发抓取任务  
    ![在这里插入图片描述][2020070410541734.png]

/** * 广东省政府采购中心 */
        @PostMapping("/fetchCGZX")
        @Scheduled(cron="${scheduler.fetch}")
        public ReturnT fetchCGZX(boolean manual){ 
            if(!manual&&!schedulerUtil.SchedulerEnable){ 
                log.info("未启动定时任务");
                return ReturnT.ERROR("未启动定时任务");
            }else{ 
                return tenderService.fetchCGZX();
            }
        }

## 报错分析 ##

根据错误信息我们可以分析，`定时任务是不能带参数的`，也就是参数栏必须为空，这是SpringBoot自带Scheduler比较鸡肋的地方吧，但是如果你确定了用他，就必须要遵守这个规则，尽量使用无参数设置。

> nested exception is java.lang.IllegalStateException: Encountered invalid @Scheduled method ‘syncCGZX’: `Only no-arg methods may be annotated with @Scheduled`

控制台输出

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tenderController' defined in file [D:\workspace\java\TenderFetchSystem\target\classes\com\softdev\system\controller\TenderController.class]: Initialization of bean failed; nested exception is java.lang.IllegalStateException: Encountered invalid @Scheduled method 'syncCGZX': Only no-arg methods may be annotated with @Scheduled
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:603) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:895) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.context.support.AbstractApplicationContext.__refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.context.support.AbstractApplicationContext.jrLockAndRefresh(AbstractApplicationContext.java:40002) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:41008) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE]
    	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE]
    	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.7.RELEASE.jar:2.2.7.RELEASE]
    	at com.softdev.system.Application.main(Application.java:15) [classes/:na]
    Caused by: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'syncCGZX': Only no-arg methods may be annotated with @Scheduled
    	at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.processScheduled(ScheduledAnnotationBeanPostProcessor.java:499) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.lambda$null$1(ScheduledAnnotationBeanPostProcessor.java:362) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_222]
    	at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.lambda$postProcessAfterInitialization$2(ScheduledAnnotationBeanPostProcessor.java:362) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) ~[na:1.8.0_222]
    	at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.postProcessAfterInitialization(ScheduledAnnotationBeanPostProcessor.java:361) ~[spring-context-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:431) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]
    	... 17 common frames omitted
    
    
    Process finished with exit code 1

## 解决方案 ##

1.  换用其他定时任务
2.  改造成两个方法，一个`手工触发`一个`定时触发`

/** * 广东省政府采购中心 */
        @PostMapping("/fetchCGZX")
        public ReturnT fetchCGZX(){ 
            return tenderService.fetchCGZX();
        }
        /** * 广东省政府采购中心 */
        @Scheduled(cron="${scheduler.fetch}")
        public ReturnT fetchCGZX_job(){ 
            //判断是否启用
            if(!schedulerUtil.SchedulerEnable){ 
                log.info("未启动定时任务");
                return ReturnT.ERROR("未启动定时任务");
            }else{ 
                return tenderService.fetchCGZX();
            }
        }

[2020070410541734.png]: https://img-blog.csdnimg.cn/2020070410541734.png