报错： 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2023-08-25 18:32:41,704 main ERROR o.s.b.SpringApplication - Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'getAsyncExecutor' defined in class path resource [com/xxxx/webapp/util/async/AsyncConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.Executor]: Factory method 'getAsyncExecutor' threw exception; nested exception is java.lang.IllegalArgumentExceptionat org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:625)at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:455)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498)at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:846)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:863)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140)at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)at com.gduccc.webapp.ResourceApplication.main(ResourceApplication.java:43)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.util.concurrent.Executor]: Factory method 'getAsyncExecutor' threw exception; nested exception is java.lang.IllegalArgumentExceptionat org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:620)... 27 common frames omitted
Caused by: java.lang.IllegalArgumentException: nullat java.util.concurrent.ThreadPoolExecutor.<init>(ThreadPoolExecutor.java:1307)at com.gduccc.webapp.util.async.AsyncConfig.getAsyncExecutor(AsyncConfig.java:45)at com.gduccc.webapp.util.async.AsyncConfig$$EnhancerBySpringCGLIB$$1964e675.CGLIB$getAsyncExecutor$1(<generated>)at com.gduccc.webapp.util.async.AsyncConfig$$EnhancerBySpringCGLIB$$1964e675$$FastClassBySpringCGLIB$$8599ef03.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244)at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363)at com.gduccc.webapp.util.async.AsyncConfig$$EnhancerBySpringCGLIB$$1964e675.getAsyncExecutor(<generated>)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154)... 28 common frames omitted

解决：

注释掉读取系统配置