Springboot------Form Validation

1. Note: Convert multiple parameter attributes into objects as parameters;

2. To do form validation is to judge the value of the property

· Restrict an attribute to add related annotations on the object's corresponding property value

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· Go back to the method that you want to validate the form with a @valid in front of the object, indicating that this object is to be validated;

· Also get the result after validation, know whether to pass; the result of validation is returned to the Bindingresult object;

· If you do not pass the validation error, print out the error and return null;

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Springboot------Form Validation