Retrieving blob from database using hibernate and displaying on web page using jsp

Nimit Johri :

Answer mentioned here This is not working for me I have sent bytes array to the database which is stored as a blob in the database

File file = new File(filePath);
byte[] imageData = new byte[(int) file.length()];

When I try to retrieve the blob object from the database in this byte array

I get a value like this "[B@526d24d9". I send this value to the jsp page.(I am sending a list of blobs to the jsp page i.e a list of bytes array) Now I am trying to render this image on a web page using jsp. But I am not able to figure out the most efficient approach one approach is to retrieve the list of blob ,process it and store it in a file and then retrieve from that filepath in the jsp page using the tag But I am looking for a more efficient approach. I am trying to something like this

jsp code

<c:forEach items="${list}" var="list" varStatus="loop">
   <c:set var="l" value="${loop.index}" />

    <tr>
    <td><c:out value= "${l+1}" /></td>
      <td><c:out value="${list.name}" /></td>
      <td><c:out value="${list.size} MB" /></td>
      <td><c:out value="${list.preview}" /></td>
      <td><i class="material-icons">edit</i>
      <i class="material-icons" onclick="Remove()">delete</i></td>
    </tr>
  </c:forEach>

list.preview contains the byte array "[B@526d24d9"

Heena Mittal :

Create a String previewUrl field in your entity class. and inside the getter write this code .

public String getPreviewUrl() {
        String pu = Base64.encode(getPreview());
        setPreviewUrl(pu);
        return previewUrl;
    }

and in your jsp code ,

<td><img class='imagem_artigo' src='data:image/png;base64,${list.previewUrl}' alt='IMG DESC' width="200" height='200'></td>

This will work