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First of all, why use clone? In the actual programming process, we often encounter this situation: there is an object A, at A certain time A already contains some valid values, at this time, we may need A new object B exactly the same as A, and any change to B will not affect the value of A, that is t ...

If there is the concept of flying in the sky, there must be the realization of landing Ten times of concept is not as good as one time of code. Friend, I hope you can type all the code cases in this article Praise before you see, form a habit Spring boot text tutorial series article directory Spring boot picture and text tutorial 1 &q ...

brief introduction Using SMS authentication code to log in, security does not support SMS authentication code login process by default, so we imitate password login to do a new authentication process. Login process SmsCodeAuthenticationFilter SMS login request SmsCodeAuthenticationProvider provides an implementation class for SMS login ...

I. Introduction 1.1 use scenario The abstract factory pattern can be used in the following situations: 1) A system should not depend on the details of how product class instances are created, combined, and expressed, which is important for all types of factory patterns. Users do not need to create ...

Preface This article summarizes the following understanding of Servlet, Filter, ServletContextListener through the previous articles. Now learn to develop the SpringMVC framework based on Servlet technology.Understand the Spring framework before learning Spring MVC. To understand Spring, you need to start with what Spring is, what Spring can do ...

Article Directory 5. Combing Core Knowledge 9. Object-oriented member modifiers 9.4 Static Method 9.5 General Method 10. Face special members such as object call, setitem, getitem, delitem 10.1 call 10.2 setitem,getitem,delitem 11. Special members such as Object Oriented dict 12. Special members ...

Preface This blog is completed step by step in the following order, which is also a learning process, so you can comment on any questions at any time. I hope we can make progress together. Article directory Preface Stack, queue, heap Linked list greedy Recursion, backtracking, divide and conquer Bin ...

Code preparation Dependency relationship +------------+ +------------+ | | | | | | | | | | | | | | | | | consumer +------------> | provider | | | Re ...

Title Description In the Kingdom of Bears, the King Tommmmmmmmmmmmmmmmy has a very strange hobby: he dislike all names with length less than 1010! In fact every time he see who has a short name, he'd be so angry that he refuse to speak in the next 998244353998244353 days! But Tommmmmmmmmmmmmmmmy the K ...

If there is the concept of flying in the sky, there must be the realization of landing Ten times of concept is not as good as one time of code. Friend, I hope you can type all the code cases in this article Praise before you see, form a habit Spring boot text tutorial series article directory Spring boot picture and text tutorial 1 &q ...