java 上传附件取消_java – 处理MaxUploadSizeExceededException不能停止上传文件

本是古典何须时尚 2022-11-03 11:42 93阅读 0赞

我想检查上传文件的大小,并防止完全载入到内存中的文件.我使用CommonsMultipartFile.上传的文件将被处理并保存在数据库中. AbstractCoupleUploadController类处理包含文件的传入请求：

public abstract class AbstractCoupleUploadController extends RemoteServiceServlet implements ServletContextAware,UploadServlet

...

@RequestMapping(method=\{RequestMethod.GET,RequestMethod.POST\})

public ModelAndView handleRequest(@RequestParam("firstFile") CommonsMultipartFile firstFile,@RequestParam("secondFile") CommonsMultipartFile secondFile,HttpServletRequest request,HttpServletResponse response)

synchronized(this)

initThreads();

perThreadRequest.set(request);

perThreadResponse.set(response);

handleUpload(firstFile,secondFile,request,response);

response.getWriter().flush();

response.flushBuffer();

return null;

private void handleUpload(CommonsMultipartFile firstFile,CommonsMultipartFile secondFile,HttpServletResponse response) throws IOException

response.setContentType("text/html");

if(firstFile.getSize() == 0 || secondFile.getSize() == 0)

response.getWriter().print(AppConstants.UPLOAD\_ZERO\_SIZE\_FILE);

return;

// other validations

// uploading:

try

String content = request.getParameter(CoupleUploadPanel.CONTENT);

T model = deserialize(content);

UploadResultModel resultModel = upload(model,firstFile,secondFile); // it's implemented in UploadFileServletImpl

if(resultModel.hasCriticalError())

response.getWriter().print(AppConstants.UPLOAD\_FAIL + "," + String.valueOf(resultModel.getWorkshopHistoryId()));

else

response.getWriter().print(AppConstants.UPLOAD\_SUCCESS + "," + String.valueOf(resultModel.getWorkshopHistoryId()));

catch(ProcessRequestException e)

// write upload error description in response.getWriter()

catch(Exception e)

e.printStackTrace();

response.getWriter().print(AppConstants.UPLOAD\_UNKOWN\_ERROR);

...

我的app-servlet.xml(file.upload.max\_size = 9437184)中有一个multipartResolver bean,另外还有一个用于处理UploadSizeExceededExceptions的maxUploadSizeExceptionExceptionHandler bean：

我的maxUploadSizeExceededExceptionHandler：

public class MaxUploadSizeExceededExceptionHandler implements HandlerExceptionResolver,Ordered

private int order;

@Override

public ModelAndView resolveException(HttpServletRequest request,HttpServletResponse response,Object handler,Exception ex)

if(ex instanceof MaxUploadSizeExceededException)

try

response.getWriter().print(ErrorConstants.UPLOAD\_SIZE\_EXCEED + "," + (((MaxUploadSizeExceededException) ex).getMaxUploadSize()/(1024\*1024)));

response.getWriter().flush();

response.flushBuffer();

return new ModelAndView();

catch(IOException e)

return null;

...

当我上传一个非常大的文件(超过$\{file.upload.max\_size\},大约700MB),CommonsMultipartResolver立即抛出MaxUploadSizeExceededException,它正在捕获和处理它(在response.getWriter()中写)).我的问题：我的浏览器上传进度条显示文件仍在上传！为什么？

更新：我正在使用：

> Spring – \* – 3.0.5.RELEASE

> commons-fileupload-1.1.1

并尝试：

> Spring – \* – 3.1.2.RELEASE

> commons-fileupload-1.3

和我的AS：

> Tomcat 6(开发中)

> Jboss 7(生产中)

更新2：在客户端,我使用GWT(我认为没关系)：

点击submitRequestButton开始上传：

@UiHandler("submitRequestButton")

public void submitRequestButtonClick(ClickEvent event)

try

// some validation

submitRequestButton.setEnabled(false);

uploadPanel.upload(model.getWorkshopHistoryModel()); // uploadPanel is from the CoupleUploadPanel type

catch(ValidationException exception)

// handle validation errors

catch(SerializationException e)

// handle serialization errors

我有一个CoupleUploadPanel小部件上传(两个文件)：

public class CoupleUploadPanel extends FormPanel

public final static String CONTENT = "content";

private static final String FIRST\_FILE = "firstFile";

private static final String SECOND\_FILE = "secondFile";

private Hidden contentInput;

private FileUpload firstFileUploadInput;

private FileUpload secondFileUploadInput;

private SerializationStreamFactory factory;

public CoupleUploadPanel(UploadServletAsync factory)

this(null,factory);

public CoupleUploadPanel(String url,UploadServletAsync factory)

this.factory = (SerializationStreamFactory) factory;

if(url != null)

setAction(url);

init();

public CoupleUploadPanel(String target,String url,UploadServletAsync factory)

super(target);

this.factory = (SerializationStreamFactory) factory;

if(url != null)

setAction(url);

init();

private void init()

setMethod("POST");

setEncoding(ENCODING\_MULTIPART);

firstFileUploadInput = new FileUpload();

firstFileUploadInput.setName(CoupleUploadPanel.FIRST\_FILE);

secondFileUploadInput = new FileUpload();

secondFileUploadInput.setName(CoupleUploadPanel.SECOND\_FILE);

contentInput = new Hidden();

contentInput.setName(CONTENT);

VerticalPanel panel = new VerticalPanel();

panel.add(firstFileUploadInput);

panel.add(secondFileUploadInput);

panel.add(contentInput);

add(panel);

public void upload(T input) throws SerializationException

contentInput.setValue(serialize(input));

submit();

private String serialize(T input) throws SerializationException

SerializationStreamWriter writer = factory.createStreamWriter();

writer.writeObject(input);

return writer.toString();

我们应该将UploadServletAsync传递给CoupleUploadPanel构造函数. UploadServletAsync和UploadServlet接口：

public interface UploadServletAsync

void upload(T model,AsyncCallback callback);

public interface UploadServlet extends RemoteService

void upload(T model);

所以uploadPanel将以这种方式被实例化：

uploadPanel= new CoupleUploadPanel((UploadFileServletAsync) GWT.create(UploadFileServlet.class));

uploadPanel.setAction(UploadFileServlet.URL);

并且添加到uploadPanel(onSumbitComplete()的SubmitCompeleteHandler将在提交完成时被调用,结果传递给客户端)：

uploadPanel.addSubmitCompleteHandler(new SubmitCompleteHandler()

@Override

public void onSubmitComplete(SubmitCompleteEvent event)

String s = event.getResults(); //contains whatever written by response.getWriter()

if(s == null)

// navigate to request list page

else

String\[\] response = s.split(",");

// based on response:

// show error messages if any error occurred in file upload

// else: navigate to upload result page

\});

UploadFileServlet和UploadFileServletAsync接口：

public interface UploadFileServlet extends UploadServlet

String URL = "\*\*/uploadFileService.mvc";

public interface UploadFileServletAsync extends UploadServletAsync

public static final UploadFileServletAsync INSTANCE = GWT.create(UploadFileServlet.class);

在服务器端：UploadFileServletImpl扩展AbstractCoupleUploadController并实现upload()方法(上传过程)：

@RequestMapping(UploadFileServlet.URL)

public class UploadFileServletImpl extends AbstractCoupleUploadController

...

@Override

protected UploadResultModel upload(WorkshopHistoryModel model,MultipartFile firstFile,MultipartFile secondFile)

throws ProcessRequestException

return workshopHistoryService.submitList(model.getWorkshop(),secondFile);

...

java 上传附件取消_java – 处理MaxUploadSizeExceededException不能停止上传文件

发表评论取消回复

还没有评论，来说两句吧...

相关阅读

相关 SFTP突然不能上传文件

相关 java上传文件(java上传文件夹)

相关 java文件上传(java文件上传下载)

相关 IE不能重复上传文件名相同的文件问题（layui上传组件解决方案及普通上传附件解决方案）

相关 java 上传附件取消_java – 处理MaxUploadSizeExceededException不能停止上传文件

相关 element 附件上传

相关附件上传：真假附件

相关附件：真假上传

相关 domino 多附件上传例子2 domino jquery附件上传，domino vue附件上传，domino react附件上传

相关 iview 上传附件