Year: 2018
Date: 5-6
Annotation: @ModelAttribute
Note: If there is this annotation on the method, the method will be executed before the method is called
Date: 4-30
1
@requestParam defaults to true. If the request does not carry the required parameters, the request cannot be made normally. [If there is a public method: that is, one method requires and the other does not, it can be modified to: @requstParam(required=false)]