How to download a file using java restful web services ?

You need to do two steps to download a file from java restful web services.

1. Annotate your service method with @Produces annotation. This annotation should have the file MIME type as a value. For example, if you are downloading pdf file then MIME type should be "application/pdf", in case if you are downloading png image file, then MIME type should be "image/png".
2. In the Response header, set “Content-Disposition” details, which helps to prompt download box on browser.

Here is the service class to download file:

	package com.goodinjava.restful;
	import java.io.File;
	import javax.ws.rs.GET;
	import javax.ws.rs.Path;
	import javax.ws.rs.Produces;
	import javax.ws.rs.core.Response;
	import javax.ws.rs.core.Response.ResponseBuilder;
	@Path("/download")
	public class RestDownloadService {
	@GET
	@Path("/service-record")
	@Produces("application/pdf")
	public Response getFile() {
	File file = new File("C:\goodinjava\employee_1415.pdf");
	ResponseBuilder response = Response.ok((Object) file);
	response.header("Content-Disposition",
	"attachment; filename=\"employee_1415.pdf\"");
	return response.build();
	}
	}

view raw RestDownloadService.java hosted with ❤ by GitHub

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