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使用MultipartFile报错：java.io.IOException: java.io.FileNotFoundException(系统找不到指定的路径。)
今天再使用公司框架遇到一个问题：spring框架MultipartFile上传文件报错。 先说原因：MultipartFile的transferTo()方法会监测传入其中的File对象的路径是否为绝对路径，如果不是绝对路径，会自动拼接application里设置的路径 和 \work\Tomcat\localhost\ROOT 解决过程：查看代码： public Map upload( HttpServletRequest request, HttpServletResponse response,@RequestParam("file")MultipartFile upload) throws IllegalStateException, IOException { String realPath =request.getParameter("target");//userfiles\1\程序附件\theFile\problem\ if (!upload.isEmpty()) { //获取原文件名 String oldName=upload.getOriginalFilename(); //获取文件大小：字节 long size=upload.getSize(); //获取文件后缀名 String format=oldName.substring(oldName.lastIndexOf(".")+1); //使用随机新文件名， String newName=IdGen.uuid()+"\\."+format; //创建目录 FileUtils.createDirectory(realPath); File file = FileUtils.getAvailableFile(realPath+newName, 0); upload.transferTo(file);//这里报错 return null; }报错信息： java.io.IOException: java.io.FileNotFoundException: E:\Administrator\Documents\Java\Project4\boot\work\Tomcat\localhost\ROOT\userfiles\1\程序附件\theFile\problem\882b77ffb7f74e6984cc1cf909fd3b59.mp3 (系统找不到指定的路径。) at org.apache.catalina.core.ApplicationPart.write(ApplicationPart.java:122) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile.transferTo(StandardMultipartHttpServletRequest.java:255) ~[spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at com.jeeplus.modules.file.web.TheFileController.upload(TheFileController.java:284) ~[classes/:na] at com.jeeplus.modules.file.web.TheFileController$$FastClassBySpringCGLIB$$b6b3e23b.invoke() ~[classes/:na] at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE] at com.jeeplus.modules.file.web.TheFileController$$EnhancerBySpringCGLIB$$ce883134.upload() ~[classes/:na] at com.jeeplus.modules.file.web.TheFileController$$FastClassBySpringCGLIB$$b6b3e23b.invoke() ~[classes/:na] at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684) ~[spring-aop-5.0.8.RELEASE.jar:5.0.8.RELEASE] at com.jeeplus.modules.file.web.TheFileController$$EnhancerBySpringCGLIB$$e3edb904.upload() ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_131] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_131] at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_131] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~[spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877) ~[spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783) ~[spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) ~[spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~[spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974) [spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877) [spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851) [spring-webmvc-5.0.8.RELEASE.jar:5.0.8.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:112) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:112) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) [druid-1.1.10.jar:1.1.10] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:387) [shiro-core-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.4.0-RC2.jar:1.4.0-RC2] at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) [spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) [spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.8.RELEASE.jar:5.0.8.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471) [tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.32.jar:8.5.32] at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_131] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_131] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.32.jar:8.5.32] at java.lang.Thread.run(Unknown Source) [na:1.8.0_131] Caused by: java.io.FileNotFoundException: E:\Administrator\Documents\Java\Project4\boot\work\Tomcat\localhost\ROOT\server.tomcat.basedir\userfiles\1\程序附件\theFile\problem\882b77ffb7f74e6984cc1cf909fd3b59.mp3 (系统找不到指定的路径。) at java.io.FileOutputStream.open0(Native Method) ~[na:1.8.0_131] at java.io.FileOutputStream.open(Unknown Source) ~[na:1.8.0_131] at java.io.FileOutputStream.(Unknown Source) ~[na:1.8.0_131] at java.io.FileOutputStream.(Unknown Source) ~[na:1.8.0_131] at org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.write(DiskFileItem.java:400) ~[tomcat-embed-core-8.5.32.jar:8.5.32] at org.apache.catalina.core.ApplicationPart.write(ApplicationPart.java:120) ~[tomcat-embed-core-8.5.32.jar:8.5.32] ... 92 common frames omitted 分析首先，transferTo()方法来自jar包不太可能出错，参数fileFileUtils来自公司框架，先检查FileUtils代码： public static File getAvailableFile(String name, int index){ File newFile = null; String suffix = StringUtils.substringAfterLast(name, "."); String filePath = StringUtils.substringBeforeLast(name, "."); if(index == 0 ){ newFile = new File(filePath+"."+suffix); }else{ newFile = new File(filePath+"("+index+")"+"."+suffix); } if(newFile.exists()){ return getAvailableFile(name,index+1); }else{ return newFile; } };没有发现问题， 输出file的path，没有错误 猜测是transferTo()方法使用方式错误，查看报错信息，找到抛出错误的方法 @Override public void transferTo(File dest) throws IOException, IllegalStateException { this.part.write(dest.getPath()); if (dest.isAbsolute() && !dest.exists()) { // Servlet 3.0 Part.write is not guaranteed to support absolute file paths: // may translate the given path to a relative location within a temp dir // (e.g. on Jetty whereas Tomcat and Undertow detect absolute paths). // At least we offloaded the file from memory storage; it'll get deleted // from the temp dir eventually in any case. And for our user's purposes, // we can manually copy it to the requested location as a fallback. FileCopyUtils.copy(this.part.getInputStream(), Files.newOutputStream(dest.toPath())); } }点击write继续深入 public void write(String fileName) throws IOException { File file = new File(fileName); if (!file.isAbsolute()) { file = new File(location, fileName); } try { fileItem.write(file); } catch (Exception e) { throw new IOException(e); } }找到原因，如果传输过来的路径是相对路径，会拼接为绝对路径，绝对路径前半部分来自application，后半部分为tomcat的路径，所以报错， 解决方法：提前拼接为绝对路径 代码： @Value("${server.tomcat.basedir}") private String systemPath;//通过注解获取application中的属性 public Map upload( HttpServletRequest request, HttpServletResponse response,@RequestParam("file")MultipartFile upload) throws IllegalStateException, IOException { String realPath =(systemPath.endsWith(File.separator)?systemPath:(systemPath + File.separator))+request.getParameter("target"); if (!upload.isEmpty()) { //获取原文件名 String oldName=upload.getOriginalFilename(); //获取文件大小：字节 long size=upload.getSize(); //获取文件后缀名 String format=oldName.substring(oldName.lastIndexOf(".")+1); //使用随机新文件名， String newName=IdGen.uuid()+"\\."+format; //创建目录 FileUtils.createDirectory(realPath); File file = FileUtils.getAvailableFile(realPath+newName, 0); upload.transferTo(file);//这里报错 return null; } |
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