File upload feature of html form works by wrapping the file content inside amultipart envelope as the content type "application/x-www-form-urlencoded" is inefficient for sending large quantities of binary data or text containing non-ASCII characters. The content type "multipart/form-data" should be used for submitting forms that contain files, non-ASCII data, and binary data.
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RESOLVE DEPENDENCY
For the "multipart/form-data" support we need to include "jersey-multipart.jar" and dependencies from here [for glassfish v3.1 & upward you will find it in glassfish\modules]. <html><body><h1>Upload File with RESTFul WebService</h1><formaction="rest/fileupload"method="post"enctype="multipart/form-data"><p>Choose a file : <inputtype="file"name="file"/></p><inputtype="submit"value="Upload"/></form></body></html>
JAVA FILE UPLOAD CLIENTWe will use Apache HTTPClient library to resolve dependency. It is an optional step & the code could be exploited to build a test-client.HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
FileBody fileContent= new FileBody(new File(fileName));
StringBody comment = new StringBody("Filename: " + fileName);
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("file", fileContent);
httppost.setEntity(reqEntity);
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
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CREATE JAX-RS FILE UPLOAD SERVICE WITH JERSEY
- jersey uses @FormDataParam to receive the uploaded file. to get the uploaded file name or header detail, compare with "
FormDataContentDisposition" which represents a "content-disposition" header whose value is "form-data".
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.sun.jersey.core.header.FormDataContentDisposition;
import com.sun.jersey.multipart.FormDataParam;
@Path("/fileupload")
public class UploadFileService {
@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFile(
@FormDataParam("file") InputStream uploadedInputStream,
@FormDataParam("file") FormDataContentDisposition fileDetail) {
String uploadedFileLocation = "c://uploadedFiles/" + fileDetail.getFileName();
// save it
saveToFile(uploadedInputStream, uploadedFileLocation);
String output = "File uploaded via Jersey based RESTFul Webservice to: " + uploadedFileLocation;
return Response.status(200).entity(output).build();
}
// save uploaded file to new location
private void saveToFile(InputStream uploadedInputStream,
String uploadedFileLocation) {
try {
OutputStream out = null;
int read = 0;
byte[] bytes = new byte[1024];
out = new FileOutputStream(new File(uploadedFileLocation));
while ((read = uploadedInputStream.read(bytes)) != -1) {
out.write(bytes, 0, read);
}
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
TEST YOUR SERVICE
Deploy & Browse to {App_URL}/{File_Upload_html}
Upload A file and check.
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