这个错误其实是 debug 级别的错误，是不影响运行的。
错误栈为：
020-10-26 15:27:57.726 DEBUG 12844 --- [nio-8080-exec-1] .s.a.AnnotationAsyncExecutionInterceptor : Could not find unique TaskExecutor bean org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.core.task.TaskExecutor' available: expected single matching bean but found 2: applicationTaskExecutor,taskScheduler at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1200) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveBean(DefaultListableBeanFactory.java:420) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:350) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:343) at org.springframework.aop.interceptor.AsyncExecutionAspectSupport.getDefaultExecutor(AsyncExecutionAspectSupport.java:233) at org.springframework.aop.interceptor.AsyncExecutionInterceptor.getDefaultExecutor(AsyncExecutionInterceptor.java:157) at org.springframework.aop.interceptor.AsyncExecutionAspectSupport.lambda$configure$2(AsyncExecutionAspectSupport.java:119) 原因和解决
简单来说就是在你的 @Configuration 中必须要实现一个 AsyncConfigurer 来为 @Async 指定一个 TaskExecutor 执行的方法。
package com.insight.sco.service.config; import org.springframework.context.annotation.Configuration; import org.springframework.scheduling.annotation.AsyncConfigurer; import org.springframework.scheduling.annotation.EnableAsync; import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor; import org.springframework.stereotype.Component; import java.util.concurrent.Executor; /** * AsyncConfigurer for Spring * * @author YuCheng Hu */ @Configuration @Component @EnableAsync public class TaskExecutorConfig implements AsyncConfigurer{ /** * Override Config * * @return */ @Override public Executor getAsyncExecutor(){ ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor(); taskExecutor.setCorePoolSize(10); taskExecutor.setMaxPoolSize(80); taskExecutor.setQueueCapacity(100); taskExecutor.initialize(); return taskExecutor; } } 可以将上面的方法拷贝放到你 Spring 的项目中，这样你的 Spring 项目就可以告诉应用的上下文使用哪一个异步方法。
