Spring validation for RequestBody parameters bound to collections in Controller methods

Question

I have

An Entity:

package org.ibp.soq;

public class MyEntity {

    private String field1;
    private String field2;

    //..get         


        

Answer 1

Actually, this can be achieved using Spring Validation and JSR303.

• Expose a MethodValidationPostProcessor bean.
• Annotate your controller class with @Validated (org.springframework.validation.annotation.Validated)
• Use the JSR303 validation annotations on your MyEntity fields/methods.
• Annotate your RequestBody argument with @Valid (you've already done this in your example).
• Add an @ExceptionHandler method to handle MethodArgumentNotValidException. This can be done in the controller or in a @ControllerAdvice class.