java - How to get size of file in rest api jersey -

i have made rest api in working fine want read size of file , have used below code 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 got size of file -1 .

can 1 suggest me how can read actual size of file .

but using

system.out.println(" data name ="+ filepart.getcontentdisposition().getfilename()); 

i got correct name of file .

hope wanted. have verified in system. prints size of 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     writetofile(uploadedinputstream, uploadedfilelocation);     file file = new file(uploadedfilelocation);     system.out.println(file.length() + " in bytes");     string output = "file uploaded : " + uploadedfilelocation;     return response.status(200).entity(output).build(); }  // save uploaded file 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 have following dependency in pom.xml

<dependency>         <groupid>org.glassfish.jersey.media</groupid>         <artifactid>jersey-media-multipart</artifactid>         <version>2.13</version> </dependency> 

also add application class extends resource config. registers class jersey having multipart content.

super(yourclass.class, multipartfeature.class);