First, the basic raw notes:
@Retention：
The notes explain the life cycle
RetentionPolicy.SOURCE -> left in code phase, ignored when compiling
RetentionPolicy.CLASS -> remain in the compilation stage, it will not be loaded into the jvm
RetentionPolicy.RUNTIME -> loaded into the jvm running
@Target：
Specify the use of notes at
ElementType.Type -> acting classes, interfaces, enumerations
ElementType.FIELD -> Properties
ElementType.METHOD -> method
Parameters> Method - ElementType.PARAMETER
ElementType.CONSTRUCTOR -> Constructor
ElementType.LOCAL_VARIABLE -> local variables
ElementType.ANNOTATION_TYPE -> acting on notes
ElementType.PACKAGE -> applied to the bag
ElementType.TYPE_PARAMETER ->
ElementType.TYPE_USE ->
@Documented：
File
@Inherited：
Inheritance, role in the parent class subclass can have notes of the parent class
@Repeatable：
Show marked annotation can be applied to many times the same attribute or statement
