How to convert an InputStream to a DataHandler?

Question

I\'m working on a java web application in which files will be stored in a database. Originally we retrieved files already in the DB by simply calling getBytes o

Answer 1

An implementation of answer from "Kathy Van Stone":

At first create helper class, which create DataSource from InputStream:

public class InputStreamDataSource implements DataSource {
    private InputStream inputStream;

    public InputStreamDataSource(InputStream inputStream) {
        this.inputStream = inputStream;
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return inputStream;
    }

    @Override
    public OutputStream getOutputStream() throws IOException {
        throw new UnsupportedOperationException("Not implemented");
    }

    @Override
    public String getContentType() {
        return "*/*";
    }

    @Override
    public String getName() {
        return "InputStreamDataSource";
    }
}

And then you can create DataHandler from InputStream:

DataHandler dataHandler = new DataHandler(new InputStreamDataSource(inputStream))

imports:

import javax.activation.DataSource;
import java.io.OutputStream;
import java.io.InputStream;