Java Reflector Toolkit Reflections

Reflections contains a lot of scanner, that is, the scanner, call the corresponding method needs to have a configuration corresponding to the scanner, or the program will throw an exception.

Scanner structure:

When used, we mainly use the reflections class to invoke.

Reflections a portion of the scanner is configured by default,

However, in the actual use of the need to add a lot of scanners, can be based on the exceptions thrown by the program to add a corresponding scan

How to use:

New New New New New Methodparameternamesscanner ());

Indicates the scanned package path and configures the scanner

1. Get all classes with action annotations

set<class<?>> classes = Reflections.gettypesannotatedwith (Action.  Class);          for (class<?> action:classes) {            = action.getannotation (requestmapper.  Class);             + "=requestmapper==" + Request.value ());        }

2. Get all the methods with Requestmapper annotations

Set<method> methods = Reflections.getmethodsannotatedwith (Requestmapper.  Class);          for (method Method:methods) {            + "=methods==" + Reflections.getmethodparamnames (method));        }

Gets the parameter name of a method: (There is no corresponding method in the JDK)

Reflections.getmethodparamnames

Java Reflector Toolkit Reflections