Come ottenere il servizio web ServletContext in Rest

Question

Sto implementando il servizio web di resto utilizzando Jersey. Devo avere l'oggetto di ServletContext per salvare il file nella directory dell'applicazione. Per favore aiutami a ottenere il contesto.

Sto chiamando questo webservice dal dispositivo Android.

Grazie in anticipo.

@Path("notice") 
public class NoticeResources { 

    @Resource 
    private ServletContext context; 


    @POST 
    @Path("uploadphoto") 
    @Consumes(MediaType.MULTIPART_FORM_DATA) 
    @Produces("text/plain") 
    public String uploadNotices(@FormDataParam("file") InputStream uploadedInputStream) { 

     File photoDirectory = new File("\\photo"); 

     // if the directory does not exist, create it 
     if (!photoDirectory.exists()) { 
      boolean result = photoDirectory.mkdir(); 
      if(result){ 
       System.out.println("DIR created"); 
      } 
     } 

     String rootPath = photoDirectory.getAbsolutePath(); 

     String uploadedFileLocation = rootPath + "\\photo.jpg"; 
     // save it 
     try { 
      writeToFile(uploadedInputStream, uploadedFileLocation); 
     } catch(Exception e) { 
      return "no" + rootPath; 
     } 
     return "yes" + rootPath; 
    } 

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

Answer 1

Usa @Context, ecco Jersey documentation

@Context 
private ServletContext context; 

AGGIORNAMENTO - è anche possibile iniettare direttamente nelle metodi se desiderate

public String uploadNotices(@Context ServletContext context, ...) 

Answer 2

usare l'annotazione @context (iniezione livello di metodo)

public Response getContext(@Context HttpServletRequest req, @Context HttpServletResponse res)throws Exception 
{ 
    System.out.println("Context Path is:"+req.getRequestURL().toString()); 
    result=req.getRequestURL().toString(); 
    return Response.status(200).entity(result).build(); 
}