File upload example in Jersey

In this tutorial, we show you how do to file upload with Jersey, JAX-RS implementation.

1. Jersey Multipart Dependency

To support multipart (file upload) in Jersey, you just need to include “jersey-multipart.jar” in Maven pom.xml file.

<id>maven2-repository.java.net</id>

<name>Java.net Repository for Maven</name>

<url>http://download.java.net/maven/2/</url>

<layout>default</layout>

</repository>

</repositories>

<groupId>com.sun.jersey</groupId>

<artifactId>jersey-server</artifactId>

</dependency>

<groupId>com.sun.jersey.contribs</groupId>

<artifactId>jersey-multipart</artifactId>

</dependency>

</dependencies>

</project>

2. File Upload HTML Form

Simple HTML form to select and upload a file.

<html>

<body>

<h1>File Upload with Jersey</h1>

<p>

Select a file : <input type="file" name="file" size="45" />

</p>

</form>

</body>

</html>

<html>

<body>

<h1>File Upload with Jersey</h1>

<p>

Select a file : <input type="file" name="file" size="45" />

</p>

</form>

</body>

</html>

3. Upload Service with Jersey

In Jersey, use @FormDataParam to receive the uploaded file. To get the uploaded file name or header detail, match it to “FormDataContentDisposition“.

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("/file")

public class UploadFileService {

@POST

@Path("/upload")

@Consumes(MediaType.MULTIPART_FORM_DATA)

public Response uploadFile(

@FormDataParam("file") InputStream uploadedInputStream,

@FormDataParam("file") FormDataContentDisposition fileDetail) {

String uploadedFileLocation = "d://uploaded/" + fileDetail.getFileName();

// save it

writeToFile(uploadedInputStream, uploadedFileLocation);

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();

}