老师您好，我遇到了这样一个问题：当本地没有视频时，第一次上传小节视频时是没有问题的；在第一次上传视频成功后，再上传视频（相同的视频或者是另一个新视频）就会报错，具体来讲，第二次上传另一个视频时还是上传的原来的（第一次）的视频

图如下

看日志后发现第二次上传的新视频key与第一次是一样的，之前第一次视频的分片是4，新的视频分片是从5开始的

图2（浏览器上打印的两次上传的日志）

File
big-file.vue?540e:56 d41d8cd98f00b204e9800998ecf8427e 2.8194976848941264e+38 6sfSqfOwzmik4A4icMYuUe
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:113 没有找到文件记录，从分片1开始上传（这是第一次上传）
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:42 File
big-file.vue?540e:56 d41d8cd98f00b204e9800998ecf8427e 2.8194976848941264e+38 6sfSqfOwzmik4A4icMYuUe
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:117 找到文件记录，从分片5开始上传（这是第二次上传）
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
big-file.vue?540e:148 上传文件成功： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object
main.js?56d7:14 请求： Object
main.js?56d7:18 返回结果： Object

spring服务端报错如下

java.io.FileNotFoundException: I:\file\bjtu\course\course\6sfSqfOwzmik4A4icMYuUe.mp4.1 (系统找不到指定的文件。)
	at java.io.FileInputStream.open0(Native Method)
	at java.io.FileInputStream.open(FileInputStream.java:195)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at com.course.file.controller.admin.UploadController.merge(UploadController.java:100)
	at com.course.file.controller.admin.UploadController.upload(UploadController.java:81)
	at com.course.file.controller.admin.UploadController$$FastClassBySpringCGLIB$$a0d8e782.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:56)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)
	at com.course.server.config.LogAspect.doAround(LogAspect.java:103)
	at sun.reflect.GeneratedMethodAccessor80.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.course.file.controller.admin.UploadController$$EnhancerBySpringCGLIB$$8d4b19b0.upload(<generated>)
	at sun.reflect.GeneratedMethodAccessor136.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

代码与老师您的代码是相同的，调试了老半天也不知道错误出在哪里，麻烦老师帮忙看一下，谢谢老师！！！