springboot集成jsp报java.io.FileNotFoundException（springboot集成jsp报java.io.FileNotFoundException）

spring boot集成jsp后，启动的时候报：

Failed to scan [file:/D:/maven/repo/javax/xml/jaxb-impl/2.1/jaxb1-impl.jar] from classloader hierarchy java.io.FileNotFoundException: D:\maven\repo\javax\xml\jaxb-impl\2.1\jaxb1-impl.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:221) 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:5128) 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:105) at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86) at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:416) at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:180) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:180) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:153) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:544) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204)

通过追述错误信息，发现tomcat启动的时候会调用 JasperInitializer 类的 onStartup 方法，对所有jar进行扫描，但是分析maven并未引入jaxb1-impl这个依赖，但是依赖了jaxb-impl。找到maven仓库中该依赖路径，分析jaxb-impl的MANIFEST.MF文件，发现依赖了jaxb1-impl。

项目的依赖

经过上面的分析，jaxb1-impl是通过jaxb-impl引入，同时jaxb-impl也是通过其他依赖引入，并未真正使用，因此将jaxb-impl排除，即可解决这个报错。