Optimize and verify shenyu-admin module interface parameters

[李克国]

Hi Community,


I have an idea. Optimize and verify shenyu-admin module interface parameters


Use validation for parameter verification, clear the verification in the code 
[in service].


Expand the annotation of validation to simplify the verification logic.


For example:


    1.Add annotation:
public @interface Existed {
   String message() default "the key is not existed!";
   Class existProvider();
}
    2.Add interface:
public interface ExistProvider {
   default boolean notExisted(Serializable key) {
       return !Boolean.TRUE.equals(existed(key));
   }
   Boolean existed(Serializable key);
}
    3. implements ConstraintValidator
    4.used in my code:
XXXMapper extend ExistProvider
 Add  sql implements in XXXMapper : select true from table where xxx limit 1
 Used in controller api :@Existed(mapper = XXXMapper.class, message = "the 
obejct data not existed”)


thanks.