Stripes中上传文件，如何使用DefaultMultipartWrapperFactory
我正在尝试开发一个小型Stripes项目，允许用户加载文件，ActionBean的基本实现如下所示：
public class UploadActionBean extends BaseActionBean{
private FileBean fileBean;
private final String fileUpload="/WEB-INF/jsp/file-upload.jsp";
public void setFileBean(FileBean fileBean){
this.fileBean=fileBean;
}
public FileBean getFileBean(){
return this.fileBean;
}
@DefaultHandler
public Resolution goToFile(){
return new ForwardResolution(fileUpload);
}
public Resolution upload() throws IOException{
System.out.println(fileBean.getFileName());
fileBean.getContentType();
fileBean.getSize();
fileBean.save(new File("/Users/enricoiorio/Desktop"));
return new ForwardResolution(fileUpload);
}
}
正如我所说，非常简单，jsp是这样的，也非常简单：
<s:form beanclass="stripesbook.action.UploadActionBean" enctype="multipart-form/data">
<s:file name="fileBean"/>
<s:submit name="upload" value="upload"/>
该应用程序似乎部署正确，应用程序启动没有问题，但一旦我单击上传，我就会收到以下异常：
net.sourceforge.stripes.exception.StripesRuntimeException: Could not construct a MultipartWrapper for the current request.
它来自 nullPointerException：
at net.sourceforge.stripes.controller.multipart.DefaultMultipartWrapperFactory.wrap(DefaultMultipartWrapperFactory.java:151)
我知道我必须使用 DefaultMultipartWrapperFactory 类的 wrap() 方法，但如何呢？ 我正在努力寻找解释该问题的文档，但没有结果，有什么建议吗？
I'm trying to develop a small Stripes project that allows the user to uoload files, the basic implementation of the ActionBean looks like so:
public class UploadActionBean extends BaseActionBean{
private FileBean fileBean;
private final String fileUpload="/WEB-INF/jsp/file-upload.jsp";
public void setFileBean(FileBean fileBean){
this.fileBean=fileBean;
}
public FileBean getFileBean(){
return this.fileBean;
}
@DefaultHandler
public Resolution goToFile(){
return new ForwardResolution(fileUpload);
}
public Resolution upload() throws IOException{
System.out.println(fileBean.getFileName());
fileBean.getContentType();
fileBean.getSize();
fileBean.save(new File("/Users/enricoiorio/Desktop"));
return new ForwardResolution(fileUpload);
}
}
As i said is very simple, the jsp is like this, also very simple:
<s:form beanclass="stripesbook.action.UploadActionBean" enctype="multipart-form/data">
<s:file name="fileBean"/>
<s:submit name="upload" value="upload"/>
The app seems to deploy correctly, the app starts with no problem but as soon as i click on upload i get the following exception:
net.sourceforge.stripes.exception.StripesRuntimeException: Could not construct a MultipartWrapper for the current request.
which arrives from a nullPointerException:
at net.sourceforge.stripes.controller.multipart.DefaultMultipartWrapperFactory.wrap(DefaultMultipartWrapperFactory.java:151)
I understand that i have to use the wrap() method of the DefaultMultipartWrapperFactory class, but how?
I'm struggling trying to find a documentation that explains that but no results, any advise?
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看来您只是缺少 Commons FileUpload。尝试将其添加到您的类路径中，看看它是否有效。
Seems like you're simply missing Commons FileUpload. Try adding it to your classpath and see if it works.
我也遇到了同样的问题。
通过在 stripes Filters 中添加 init 参数解决了这个问题。
I had got the same problem.
Got resolved by adding init param in stripes Filters.