Spring MVC JSP not showing output properly

Question

I have the following in a JSP with Spring:

<img alt="Embedded Image" src="data:image/png;base64,${item.imageDataBase64}"/>

I have a debug statement in the getImageDataBase64 method in the bean and the message gets printed in the Tomcat logs properly, the base 64 data is encoded there.

However, it does not display on my JSP. I have tried displaying the plain data in <pre> tags, but it is always blank.

If I just do ${item.imageData} it displays the byte array data.

Here is the relevant Java code:

public String getImageDataBase64() {
    L.debug("Sending base 64 data: {}", org.apache.commons.codec.binary.Base64
                                        .encodeBase64String(imageData));
    if (imageData != null) {
        return "";
    }
    return org.apache.commons.codec.binary.Base64
           .encodeBase64String(imageData);
}

/**
* @return the imageData
*/
public byte[] getImageData() {
    return imageData;
}

Any ideas why this would happen?

Bogdan · Accepted Answer · 2014-05-24 14:18:36Z

2

From what I see your code works as expected and returns an empty string.

In your getImageDataBase64 method try replacing this:

if (imageData != null) {
    return "";
}

with this:

if (imageData == null) {
    return "";
}

answered May 24, 2014 at 14:18

Bogdan

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1 Comment

mikeb Over a year ago

Good grief, rookie mistake. Guess it was time to take a break

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