Question

I have a Spring MVC application which has a registration form. This form has a picture in the format of base64 data. I would like to store this data in the database. Presently i am storing the base64 data in an input element. I have a few questions regarding this;

1. what html element should i hold the base64 data in presently i am using an input element however i am getting an error on insert (Blob is the data type used in the Database and the Java object) –

   Failed to convert property value of type java.lang.String to required type java.sql.Blob for property photo; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [java.sql.Blob] for property photo: no matching editors or conversion strategy found

   OR is there a way to convert String To BLOB in java

2. Do i still need to use enctype=”multipart/form-data” on the form tag even thought the data is in base64?

3. If the base64 data is stored in held in html file element how do i preform validation on that to check if it is NULL?

Answer 1

You can use LobHelper to convert it to a Blob. You get the LobHelper from your hibernate session Session.getLobHelper().

As long as you don’t have an <input type="file" />, there should be no need for enctype=”multipart/form-data”.

Validation should work as on ordinary String properties with @NotNull.

Personally I wouldn’t store it encoded.