ERROR: “System.Web.Mvc.Controller.File(string, string, string)”是一个“方法”

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本文介绍了解决ASP.NET MVC中Controller.File方法与System.IO.File类名称冲突的方法。通过明确指定完全限定类名，可以避免编译错误，确保代码正常运行。

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ERROR: “System.Web.Mvc.Controller.File(string, string, string)”是一个“方法”，这在给定的上下文中无效

 

这是一个与Controller.File方法和System.IO.File类名称冲突的问题,只要完整输入明确类名就可解决。

比如：File.ReadAllText(file);   》改为》  System.IO.File.ReadAllText(file);

转载自:http://www.cnblogs.com/craig/archive/2010/01/29/1659456.html#undefined

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@ApiOperation("批量下载图像及label文件成压缩包接口") @PostMapping("/downloadZip") public DeferredResult<ResponseEntity<StreamingResponseBody>> downloadZip(@RequestBody List<Long> ids) { DeferredResult<ResponseEntity<StreamingResponseBody>> deferredResult = new DeferredResult<>(3600000L); CompletableFuture.runAsync(() -> { try { // 提前校验数据 List<CpImageInfo> cpImageInfos = cpImageMapper.selectBatchIds(ids); if (cpImageInfos.isEmpty()) { throw new RuntimeException("未找到样本信息"); } String zipName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + ".zip"; HttpHeaders headers = new HttpHeaders(); headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); headers.setContentDisposition(ContentDisposition.builder("attachment") .filename(URLEncoder.encode(zipName, "UTF-8")).build()); // 使用匿名内部类 StreamingResponseBody stream = new StreamingResponseBody() { @Override public void writeTo(OutputStream outputStream) throws IOException { try { fileImageService.downloadZip(ids, outputStream); } catch (Exception e) { log.error("文件流生成异常", e); throw new IOException("压缩过程发生错误"); } } }; deferredResult.setResult(ResponseEntity.ok() .headers(headers) .body(stream)); } catch (Exception e) { deferredResult.setErrorResult( ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR) .body("下载失败: " + e.getMessage())); } }); deferredResult.onTimeout(() -> deferredResult.setErrorResult( ResponseEntity.status(HttpStatus.REQUEST_TIMEOUT) .body("下载超时"))); deferredResult.onError(ex -> deferredResult.setErrorResult( ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR) .body("系统错误: " + ex.getMessage()))); return deferredResult; } @Override public void downloadZip(List<Long> ids, OutputStream outputStream) throws IOException { List<CpImageInfo> cpImageInfos = cpImageMapper.selectBatchIds(ids); if (cpImageInfos.isEmpty()) { throw new RuntimeException("未找到样本信息"); } // 使用非缓冲流提高大文件性能 try (ZipOutputStream zos = new ZipOutputStream(outputStream)) { zos.setLevel(Deflater.DEFAULT_COMPRESSION); // 平衡速度和压缩率 String rootDir = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + "/"; int i = 0; for (CpImageInfo imageInfo : cpImageInfos) { if (Thread.currentThread().isInterrupted()) { throw new IOException("下载被中断"); } i++; String safeImageName = sanitizeFilename(imageInfo.getImageName()); String name = removeParentheses(safeImageName); String sampleDir = rootDir + name + "(" + i + ")/"; // 处理图像文件 List<CpImageBasicInfo> imageFiles = cpImageBasicMapper.selectByUniqueValue(imageInfo.getUniqueValue()); for (CpImageBasicInfo file : imageFiles) { addFileToZip(zos, sampleDir + "img/" + file.getImageName(), file.getImagePath()); } // 处理标签文件 List<CpLabelBasicInfo> labelFiles = cpLabelBasicMapper.selectByUniqueValue(imageInfo.getUniqueValue()); for (CpLabelBasicInfo file : labelFiles) { addFileToZip(zos, sampleDir + "gt/" + file.getLabelFileName(), file.getLabelFilePath()); } // 定期刷新输出流 zos.flush(); outputStream.flush(); } } } // 改进的文件添加方法 private void addFileToZip(ZipOutputStream zos, String entryName, String filePath) throws IOException { File file = new File(filePath); if (!file.exists()) { log.warn("文件不存在: {}", filePath); return; } try (FileInputStream fis = new FileInputStream(file)) { ZipEntry zipEntry = new ZipEntry(entryName); zos.putNextEntry(zipEntry); byte[] buffer = new byte[65536]; // 64KB 缓冲区 int len; while ((len = fis.read(buffer)) > 0) { // 检查是否中断 if (Thread.currentThread().isInterrupted()) { throw new IOException("下载被中断"); } zos.write(buffer, 0, len); } zos.closeEntry(); } } // 文件名消毒处理 private String sanitizeFilename(String filename) { return filename.replaceAll("[\\\\/:*?\"<>|]", "_"); } public String removeParentheses(String filename) { if (filename == null) { return null; } String result = filename; int prevLength; // 循环替换直到没有括号内容 do { prevLength = result.length(); result = result.replaceAll("\\(.*?\\)", ""); } while (result.length() < prevLength); return result; } 2025-06-06 10:56:59.176 ERROR 22432 --- [ MvcAsync1] c.a.e.c.sample.FileImageController : 文件流生成异常 org.apache.catalina.connector.ClientAbortException: java.io.IOException: 远程主机强迫关闭了一个现有的连接。 at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:783) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:688) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:388) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:366) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at java.util.zip.DeflaterOutputStream.deflate(DeflaterOutputStream.java:253) ~[na:1.8.0_102] at java.util.zip.DeflaterOutputStream.write(DeflaterOutputStream.java:211) ~[na:1.8.0_102] at java.util.zip.ZipOutputStream.write(ZipOutputStream.java:331) ~[na:1.8.0_102] at com.aircas.evaluation.service.impl.sample.FileImageInfoServiceImpl.addFileToZip(FileImageInfoServiceImpl.java:876) ~[classes/:na] at com.aircas.evaluation.service.impl.sample.FileImageInfoServiceImpl.downloadZip(FileImageInfoServiceImpl.java:841) ~[classes/:na] at com.aircas.evaluation.service.impl.sample.FileImageInfoServiceImpl$$FastClassBySpringCGLIB$$50be5633.invoke(<generated>) ~[classes/:na] at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.20.jar:5.3.20] at org.springframework.aop.framework.CglibAopProxy.invokeMethod(CglibAopProxy.java:386) ~[spring-aop-5.3.20.jar:5.3.20] at org.springframework.aop.framework.CglibAopProxy.access$000(CglibAopProxy.java:85) ~[spring-aop-5.3.20.jar:5.3.20] at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:704) ~[spring-aop-5.3.20.jar:5.3.20] at com.aircas.evaluation.service.impl.sample.FileImageInfoServiceImpl$$EnhancerBySpringCGLIB$$5e579eb.downloadZip(<generated>) ~[classes/:na] at com.aircas.evaluation.controller.sample.FileImageController$1.writeTo(FileImageController.java:315) ~[classes/:na] at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:111) [spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:98) [spring-webmvc-5.3.20.jar:5.3.20] at org.springframework.web.context.request.async.WebAsyncManager.lambda$startCallableProcessing$4(WebAsyncManager.java:337) [spring-web-5.3.20.jar:5.3.20] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_102] at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266) ~[na:1.8.0_102] at java.util.concurrent.FutureTask.run(FutureTask.java) ~[na:1.8.0_102] at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_102] Suppressed: org.apache.catalina.connector.ClientAbortException: java.io.IOException: The current thread was interrupted at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:353) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:783) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:688) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:388) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:366) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at java.util.zip.DeflaterOutputStream.deflate(DeflaterOutputStream.java:253) ~[na:1.8.0_102] at java.util.zip.ZipOutputStream.closeEntry(ZipOutputStream.java:255) ~[na:1.8.0_102] at java.util.zip.ZipOutputStream.finish(ZipOutputStream.java:360) ~[na:1.8.0_102] at java.util.zip.DeflaterOutputStream.close(DeflaterOutputStream.java:238) ~[na:1.8.0_102] at java.util.zip.ZipOutputStream.close(ZipOutputStream.java:377) ~[na:1.8.0_102] at com.aircas.evaluation.service.impl.sample.FileImageInfoServiceImpl.downloadZip(FileImageInfoServiceImpl.java:854) ~[classes/:na] ... 14 common frames omitted Caused by: java.io.IOException: The current thread was interrupted at org.apache.tomcat.util.net.NioChannel.checkInterruptStatus(NioChannel.java:236) at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134) at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1384) at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:773) at org.apache.tomcat.util.net.SocketWrapperBase.writeBlocking(SocketWrapperBase.java:593) at org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:537) at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.doWrite(Http11OutputBuffer.java:547) at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:110) at org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:194) at org.apache.coyote.Response.doWrite(Response.java:615) at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:340) ... 25 common frames omitted Caused by: java.io.IOException: 远程主机强迫关闭了一个现有的连接。 at sun.nio.ch.SocketDispatcher.write0(Native Method) ~[na:1.8.0_102] at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51) ~[na:1.8.0_102] at sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:93) ~[na:1.8.0_102] at sun.nio.ch.IOUtil.write(IOUtil.java:65) ~[na:1.8.0_102] at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:471) ~[na:1.8.0_102] at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:135) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1384) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:773) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.tomcat.util.net.SocketWrapperBase.writeBlocking(SocketWrapperBase.java:593) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:537) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.doWrite(Http11OutputBuffer.java:547) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:112) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:194) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.coyote.Response.doWrite(Response.java:615) ~[tomcat-embed-core-9.0.63.jar:9.0.63] at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:340) ~[tomcat-embed-core-9.0.63.jar:9.0.63] ... 24 common frames omitted
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