Upload
Using Upload
Upload component allows to upload multiple files at once.
Its method setMaxFiles may be used to limit maximum number of files to upload.
A Receiver instance should be specified to receive uploaded data.
Here is the simplest case when you want to allow to upload only one file:
Source code
Java
FileBuffer fileBuffer = new FileBuffer();
Upload upload = new Upload(fileBuffer);The uploaded data will be stored for you in a file on the filesytem and
you may get the data from the file using the getInputStream() method.
If you want to allow upload multiple files then you should use a MultiFileReceiver.
Here is an example:
Source code
Java
MultiFileBuffer multiFileBuffer = new MultiFileBuffer();
Upload upload = new Upload(multiFileBuffer);Here the MultiFileBuffer class is a ready-made implementation of MultiFileReceiver.
Similary to the single file case the data will be stored in files on the filesystem
and you may get the date using a file name and the getInputStream(String) method.
Using Upload with Spring
If you are using Spring then you should provide a org.springframework.web.multipart.MultipartResolver
bean in your configuration. Otherwise there will be an exception about multi-part configuration absence.
The simplest way to provide a multipart resolver is using CommonsMultipartResolver for Apache Commons FileUpload.
Add the following code into your configuration class:
Source code
Java
@Bean(name = "multipartResolver")
public CommonsMultipartResolver multipartResolver() {
return new CommonsMultipartResolver();
}