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Spring Boot Rest API JSON validation

 
Greenhorn
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I have a rest API set up that accepts a JSON request and maps it to a POJO.  My question is, what is the best practice or how do I validate that the JSON that is being sent contains valid data before continuing on and processing further logic?  If it's invalid, I want to send a message back to the user to indicate that the request was bad.  Do I have to iterate through every possible field and check them?  For example, let's say I'm expecting a value for a field that will end up being a main data element for my java object, how can I verify it is there?  Thanks in advance for the help.
 
Rancher
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What you are describing is commonly known as (Java Bean Validation).
 
Bartender
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Here is my brainstorming suggestion.
Support you have a POJO called Student:


In your controller, you may have something like this:



You can create a Test package using JUnit 5:

 
Greg Abel
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Thank you for the help
 
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