How to get size of file in rest api jersey

Question

I have made a rest api in this it is working fine but i want to read size of file and i have used below code to read size of file

@POST
@Path("/test")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response upload( FormDataMultiPart form ){
    System.out.println(" size of file="+ filePart.getContentDisposition().getSize());
}

but i got the size of file -1 .

Can any one suggest me how can i read actual size of file .

But using

System.out.println(" data name ="+ filePart.getContentDisposition().getFileName());

i got correct name of file .

Answer 1

Hope this is what you wanted. I have verified it in my system. This prints the size of the file in bytes.

@POST
@Path("/upload")
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response uploadFile(@FormDataParam("file") InputStream uploadedInputStream, @FormDataParam("file") FormDataContentDisposition fileDetail) {

    String uploadedFileLocation = "/home/Desktop/" + fileDetail.getFileName();
    // save it
    writeToFile(uploadedInputStream, uploadedFileLocation);
    File file = new File(uploadedFileLocation);
    System.out.println(file.length() + " in bytes");
    String output = "File uploaded to : " + uploadedFileLocation;
    return Response.status(200).entity(output).build();
}

// save uploaded file to new location
private void writeToFile(InputStream uploadedInputStream, String uploadedFileLocation) {

    try {
        OutputStream out = new FileOutputStream(new File(uploadedFileLocation));
        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();
    }
}

make sure you have the following dependency in your pom.xml

<dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-multipart</artifactId>
        <version>2.13</version>
</dependency>

also add this to your application class which extends resource config. This registers your class with jersey as having multipart content.

super(YourClass.class, MultiPartFeature.class);