java

关注公众号 jb51net

关闭
首页 > 软件编程 > java > java.io.UncheckedIOException

java.io.UncheckedIOException: Cannot delete C:\Users\guo\AppData\Local\Temp\tomcat.8081问题

作者：灵溪798

本文主要介绍了java.io.UncheckedIOException: Cannot delete C:\Users\guo\AppData\Local\Temp\tomcat.8081问题,具有一定的参考价值,感兴趣的可以了解一下

首先它的报错是这样的，只要遇到这个报错，就是InputStream流使用后未关闭，inputStream.close()一下就可以啦

java.io.UncheckedIOException: Cannot delete C:\Users\guo\AppData\Local\Temp\tomcat.8081.8076585834079724671\work\Tomcat\localhost\ROOT\upload_00daa733_afe5_4d51_a016_0ed308a7e006_00000000.tmp
	at org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.delete(DiskFileItem.java:431) ~[tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationPart.delete(ApplicationPart.java:53) ~[tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.springframework.web.multipart.support.StandardServletMultipartResolver.cleanupMultipart(StandardServletMultipartResolver.java:134) ~[spring-web-5.3.29.jar:5.3.29]
	at org.springframework.web.servlet.DispatcherServlet.cleanupMultipart(DispatcherServlet.java:1251) [spring-webmvc-5.3.29.jar:5.3.29]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1108) [spring-webmvc-5.3.29.jar:5.3.29]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965) [spring-webmvc-5.3.29.jar:5.3.29]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) [spring-webmvc-5.3.29.jar:5.3.29]
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) [spring-webmvc-5.3.29.jar:5.3.29]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:555) [tomcat-embed-core-9.0.79.jar:4.0.FR]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) [spring-webmvc-5.3.29.jar:5.3.29]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:623) [tomcat-embed-core-9.0.79.jar:4.0.FR]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) [tomcat-embed-websocket-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) [spring-web-5.3.29.jar:5.3.29]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) [spring-web-5.3.29.jar:5.3.29]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) [spring-web-5.3.29.jar:5.3.29]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) [spring-web-5.3.29.jar:5.3.29]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) [spring-web-5.3.29.jar:5.3.29]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) [spring-web-5.3.29.jar:5.3.29]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:390) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:926) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1790) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.79.jar:9.0.79]
	at java.lang.Thread.run(Thread.java:750) [na:1.8.0_322]
Caused by: java.io.IOException: Cannot delete C:\Users\guo\AppData\Local\Temp\tomcat.8081.8076585834079724671\work\Tomcat\localhost\ROOT\upload_00daa733_afe5_4d51_a016_0ed308a7e006_00000000.tmp
	... 44 common frames omitted

我当时代码是这样的，以为将流直接赋值就行了，忘记了这是地址啊，一但重新赋值就是指向了新的输入流，原本的那个流就没人指向它了，jvm直接会定期清除。但是我没有关掉那个流，所以就一直报上面的那个bug。怎么说呢，写代码的时候带点脑子。

    public static InputStream pictureCompression(InputStream inputStream,String suffix, float scale) throws IOException {
        File tempFile = File.createTempFile("temp", suffix);
        try {
            Thumbnails.of(inputStream)
                    .scale(scale)
                    .toFile(tempFile);
            inputStream = new FileInputStream(tempFile);
        } catch (IOException e) {
            log.error("[图片压缩失败]");
        } finally {
            tempFile.deleteOnExit(); // 删除临时文件
        }
        return inputStream;
    }

就这样关掉就好了

    public static InputStream pictureCompression(InputStream inputStream,String suffix, float scale) throws IOException {
     File tempFile = File.createTempFile("temp", suffix);
     try {
         Thumbnails.of(inputStream)
                 .scale(scale)
                 .toFile(tempFile);
         inputStream.close();
         inputStream = new FileInputStream(tempFile);
     } catch (IOException e) {
         log.error("[图片压缩失败]");
     } finally {
         tempFile.deleteOnExit(); // 删除临时文件
     }
     return inputStream;
 }

到此这篇关于java.io.UncheckedIOException: Cannot delete C:\Users\guo\AppData\Local\Temp\tomcat.8081问题的文章就介绍到这了,更多相关java.io.UncheckedIOException内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！ 

您可能感兴趣的文章:
阅读全文