Jax-RS从字节[]生成图像

Question

我试图在用户点击url时显示图像http://localhost:8080/app/profile/getImage/5315d33284aec8c202eef15a它应该显示ID为5315d33284aec8c202eef15a的图像。

My service is 



@GET 
    @Path("/getImage/{id}") 
    @Produces({"image/*"}) 
    public Response getImage(@PathParam("id") final String id) 
    { 
     ResponseBuilder builder = Response.status(Status.INTERNAL_SERVER_ERROR); 
     try 
     { 

      final byte[] imageBytes = getImageBytes(id); 
System.out.println("image length "+imageBytes.length); 
      builder.status(Status.OK).entity(new StreamingOutput(){ 
       @Override 
       public void write(OutputStream output) throws IOException, WebApplicationException 
       { 
        output.write(imageBytes); 
        output.flush(); 

       } 

      }); 
     } 
     catch (Exception e) 
     { 
      System.out.println("exception "+e); 
     } 
     return builder.build(); 
    } 

但它不产生图像。 System.out.println("image length "+imageBytes.length);给出输出=>图像长度72240我在哪里失踪？

Answer 1

您需要指定所生成图像的类型。对于PNG图像，将.type("image/png")添加到ResponseBuilder。

builder.status(Status.OK).type("image/png").entity(new StreamingOutput(){ 
    @Override 
    public void write(OutputStream output) throws IOException, WebApplicationException { 
     output.write(imageBytes); 
     output.flush(); 
    } 
});