When you find that a class is not enough, you can use 3 ways to enhance

When you find that a class is not enough, you can use 3 ways to enhance

A. Creating subclasses, overwriting methods that need to be enhanced
B. Packaging design Pattern
1. Define a class that implements the same interface as the object being enhanced
2. Define a variable in the class, remembering the object being enhanced
3. Define a construction object to accept the enhanced object
4. Overlay the method you want to enhance
5. For methods that do not want to be enhanced, call the target object directly
C. Using dynamic proxies (AOP-oriented slicing)

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When you find that a class is not enough, you can use 3 ways to enhance