WARN o.a.t.util.scan.StandardJarScanner - Failed to scan [file:/D:/Mavencangku/com/sun/xml/bind/jaxb-core/2.3.0/jaxb-api.jar] from classloader hierarchy

1、SpringBoot项目启动突然报错

2024-03-27 14:57:41 [restartedMain] WARN  o.a.t.util.scan.StandardJarScanner - Failed to scan [file:/D:/Mavencangku/com/sun/xml/bind/jaxb-core/2.3.0/jaxb-api.jar] from classloader hierarchy
java.io.FileNotFoundException: D:\Mavencangku\com\sun\xml\bind\jaxb-core\2.3.0\jaxb-api.jar (系统找不到指定的文件。)
	at java.util.zip.ZipFile.open(Native Method)
	at java.util.zip.ZipFile.<init>(ZipFile.java:225)
	at java.util.zip.ZipFile.<init>(ZipFile.java:155)
	at java.util.jar.JarFile.<init>(JarFile.java:167)
	at java.util.jar.JarFile.<init>(JarFile.java:131)
	at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:184)
	at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65)
	at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49)
	at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:383)
	at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:318)
	at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:270)
	at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:233)
	at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262)
	at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104)
	at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:83)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5136)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:841)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.startup.Tomcat.start(Tomcat.java:468)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123)
	at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104)
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:437)
	at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:191)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:176)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:158)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at com.qianyu.Application.main(Application.java:35)
	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.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)

不知道为什么，启动的时候去本地maven仓库找jaxb-api.jar这个jar包。我还去本地Maven仓库看了下，里面有这个包但是启动项目还是会报错。之前就可以正常启动。

2、解决办法

我看网上说，进入项目的跟目录，在项目名称.iml文件中加入三行配置，试了下没有效果。可能是我没有配置好或者出现的报错问题不一样，没有生效。

  <orderEntry type="library" name="Maven: javax.xml.bind:jaxb-api:2.3.1" level="project" />
  <orderEntry type="library" name="Maven: com.sun.xml.bind:jaxb-core:2.3.0" level="project" />
  <orderEntry type="library" name="Maven: com.sun.xml.bind:jaxb-impl:2.3.0" level="project" />

然后又把.iml和.idea文件删除了，让IDEA重新加载一下项目。启动项目发现还有这个错误问题。最后看一位网友写的博客说，在SpringBoot启动类Application里面注入一个Bean

    @Bean
    public TomcatServletWebServerFactory tomcatFactory() {
        return new TomcatServletWebServerFactory() {
            @Override
            protected void postProcessContext(Context context) {
                ((StandardJarScanner) context.getJarScanner()).setScanManifest(false);
            }
        };
    }

启动项目，报错问题解决，感谢大哥！