CODEWITHSUNDEEP
javaspringjspjakarta-eespring-mvc
dinesh028
dinesh028

Reputation: 2187

Image is not displayed on retrieval

I have a table with images stored in it as BLOB. I'm using JPA/Hibernate. Images are mapped to a bean field with type blob. Now my Spring controller is returning entire list of bean (each object of this bean has a blob object) to my jsp. I want to display all the images on that jsp.

I tried to use some thing like this on my jsp:

<c:forEach items="${itemList}" var="item" varStatus="status" >

<img src="<c:out value="${item.image}" />"/><br/> /*<img src="${item.image}"/> */

</c:forEach>

but that is not working. Instead of getting the list of images displayed on jsp , I 'm getting the class name, when I view the page source I saw something like this <img src="java.object.serilizableBlob@2134"/>

Please help me delve with the problem. How can I display all the images on same jsp.

Upvotes: 1

Views: 660

Answers (1)

BalusC
BalusC

Reputation: 1108722

The <img src> has to point to an URL, not to a toString() representation of some blob object. The webbrowser wouldn't understand how to download it and it will effectively end up in a HTTP 404 error.

You rather want to end up with for example this:

<img src="url/to/image.png" />

To serve images dynamically from a database, use a servlet. You should then instead of a list of blobs have a list of unique image IDs/filenames so that your HTML end up like this

<img src="imageservlet/image1.png" />
<img src="imageservlet/image2.png" />
<img src="imageservlet/image3.png" />

This way the browser can download the images by URL and display them accordingly.

No, printing binary data among all that HTML won't help. The data URI scheme comes close, but this isn't fully supported in all modern browsers.

See also:

  • How to retrieve and display images from a database in a JSP page? - this shows the "raw JDBC" example, but the idea is the same for JPA/Hibernate; just get a byte[] or an InputStream of the DB somehow and write it to the OutputStream of the response after having set the necessary response headers so that the browser understands how to deal with it.

Upvotes: 2

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