RESTful JAX-RS File Download Example

We can download text files, image files, pdf files, excel files in java by JAX-RS API. To do so we need to write few lines of code only. Here, we are using jersey implementation for developing JAX-RS file download examples.

You need to specify different content type to download different files. The @Produces annotation is used to specify the type of file content.

@Produces(“text/plain”): for downloading text file.
@Produces(“image/png”): for downloading png image file.
@Produces(“application/pdf”): for downloading PDF file.
@Produces(“application/vnd.ms-excel”): for downloading excel file.
@Produces(“application/msword”): for downloading ms word file.

Click me to download jersey jar files.

JAX-RS Text File Download

File: FileDownloadService.java

 package com.tutoraspire.rest; 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(“/files”) public class FileDownloadService {  private static final String FILE_PATH = “c:\myfile.txt”; @GET @Path(“/txt”) @Produces(“text/plain”) public Response getFile() {  File file = new File(FILE_PATH);   ResponseBuilder response = Response.ok((Object) file); response.header(“Content-Disposition”,”attachment; filename=”tutoraspire_file.txt””); return response.build();   }  } 

File: web.xml

 <?xml version=”1.0″ encoding=”UTF-8″?> <web-app xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”  xmlns=”http://java.sun.com/xml/ns/javaee”  xsi:schemaLocation=”http://java.sun.com/xml/ns/javaee  http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd”  id=”WebApp_ID” version=”3.0″>  <servlet>     <servlet-name>Jersey REST Service</servlet-name>     <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>     <init-param>         <param-name>jersey.config.server.provider.packages</param-name>         <param-value>com.tutoraspire.rest</param-value>     </init-param>     <load-on-startup>1</load-on-startup>   </servlet>   <servlet-mapping>     <servlet-name>Jersey REST Service</servlet-name>     <url-pattern>/rest/*</url-pattern>   </servlet-mapping> </web-app>  

File: index.html

Now run this application on server, you will see the following output:

Output:

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JAX-RS Image File Download

File: FileDownloadService.java

 package com.tutoraspire.rest; 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(“/files”) public class FileDownloadService {  private static final String FILE_PATH = “c:\myimage.png”; @GET @Path(“/image”) @Produces(“image/png”) public Response getFile() { File file = new File(FILE_PATH); ResponseBuilder response = Response.ok((Object) file); response.header(“Content-Disposition”,”attachment; filename=”tutoraspire_image.png””); return response.build();   }  } 

File: web.xml

Same as above example.

File: index.html

Click me to download this example

JAX-RS PDF File Download

File: FileDownloadService.java

 package com.tutoraspire.rest; 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(“/files”) public class FileDownloadService {  private static final String FILE_PATH = “c:\mypdf.pdf”;  @GET @Path(“/pdf”) @Produces(“application/pdf”) public Response getFile() {  File file = new File(FILE_PATH);  ResponseBuilder response = Response.ok((Object) file); response.header(“Content-Disposition”,”attachment; filename=”tutoraspire_pdf.pdf””); return response.build();  }  } 

File: web.xml

Same as above example.

File: index.html

Click me to download this example

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