Constructing a DataSource from an InputStream or Byte array

Question

I am writing a small file upload utility thing as part of a larger project. Originally I was handling this from a servlet using the Apache commons File utility classes. Here is a snippet from a quick test client I wrote for the service: ``` public static void main(String[] args) { JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean(); factory.getInInterceptors().add(new LoggingInInterceptor()); factory.getOutInterceptors().add(new LoggingOutInterceptor()); factory.setServiceClass(FileUploadService.class); factory.setAddress("http://localhost:8080/FileUploadService/FileUploadService"); FileUploadService client = (FileUploadService) factory.create(); FileType file = new FileType(); file.setName("statemo_1256144312279"); file.setType("xls"); DataSource source = new FileDataSource(new File("c:/development/statemo_1256144312279.xls")); file.setHandler(new DataHandler(source)); Boolean ret = client.uploadFile(file); System.out.println (ret); System.exit(0); ``` } This works absolutely…

Accepted Answer

This was rather simple actually, I just copied over the bytes from the InputStream to the DataSource:

```
FileItem f = files.get(0);

// there is a problem here where the file being created is empty, since we only have a
// partial path:
DataSource source = new FileDataSource(new File(f.getName()));

// because of the above problem, we are going to copy over the data ourselves:
byte[] sourceBytes = f.get();
OutputStream sourceOS = source.getOutputStream();
sourceOS.write(sourceBytes);
```

Constructing a DataSource from an InputStream or Byte array

Solution

Problem