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Spring JDBC value-add provided by the Spring Framework's on top JDBC layer

Define connection parameters

Open the connection

Specify the statement

Prepare and execute the statement

Set up the loop to iterate through the results (if any)

Do the work for each iteration

Process any exception

Handle transactions

Close the connection

Basically , you don't need to worry about managing and suffering from infrastructure/plumbing code and purely worry about data and its mapping to objects.

Spring utilizes Template pattern to hide all low level details while giving you extension hooks to extend and work with JDBC.

Also, there is a well defined API for database exceptions, that is really developer-friendly when compared to exception hierarchy provided by low level JDBC API's