Upload image in spring mvc

Question

I am using spring 4 and hibernate 4 to upload and retrieve image to and from database. I have converted multipart image into byte array and stored in database. My query is how to retrieve that image from database and display the byte array in jsp without storing it in local system.

Answer 1

As you haven't mentioned your DB structure for storing the images, I assume that you are storing it in blob datatype.

Part 1: ControllerClass

After retrieving the image from the DB, you have to encode that image using Base64.encode and map that image to your jsp (using java.util.map).

Map<String, Object> model = new HashMap<String, Object>();
model.put("myImage", Base64.encode(MyImage)); //MyImage (datatype 'byte[]') is the image retrieved from DB
return new ModelAndView("display", model); //display is the name of jsp on which you want to display image

Part 2: JSP

Then display it on the JSP by decoding the byte array,

<img id="myImg" name="myImg" src="data:image/jpg;base64,<c:out value='${myImage}'/>" >