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3, spring integrates MyBatis Official download address Power node spring data Video viewing address https://www.bilibili.com/video/BV1nz4y1d7uy Integrating MyBatis with Spring mainly solves the problem of handing over SqlSessionFactory objects to Spring for management You only need to register the SqlSessionFactoryBean, the object gener ...

day06 inherits features and abstract classes Object oriented knowledge Definition: the behavior of the same object shows different effects at different times or conditions Conditions for polymorphism: inheritMethod coverageA parent class reference points to a child class object eg: cat cat = new Persian cat(); Access characteristics of ...

The relationship between the three is shown in the figure: Note: 7001 + 7002 is Eurake service cluster; 80 is the summer end of the service caller; 8001 + 8002 is the service provider. Eureka service clusters should register and watch each other when registering. (1) Eureka service cluster environment construction and registration Find the ...

What is reflection? java reflection mechanism is to know all the properties and methods of any class in the running state; For any object, you can call any of its methods and properties; This kind of dynamically acquired information and the function of dynamically calling object methods are called the reflection mechanism of java language (the ...

Although I have written Java code for some time, I still can't figure it out and give up selectively as long as I see generics. However, I found that generics are used in many places when looking at the code of the company leaders today, so I'll sort out the generics I understand today. What is generics generic programming is a style or pa ...

Chapter VI: exception handling one 1. Overview of anomalies one 1.1 introduction of abnormality one 1.2 concept of abnormality two 2. Anomaly classification three 2.1 abnormal system three 2.2 Throwable......................................................................................................................... 3 2.3 error fou ...

Weight loss plan (if) Demand: enter the number of weeks and display the corresponding activities Monday: running Tuesday: swimming Wednesday: jogging Thursday: sleep Friday: walk Saturday: cycling Sunday: Travel Code demonstration public static void main(String[] args){ Scanner sc = new Scanner(System.in); Syste ...

object-oriented 1. Relationship between classes 1.1 succession Using extensions, there is single inheritance between classes, multiple inheritance between interfaces, and multiple inheritance are separated by commas 1.2 realization class A{ } //Single inheritance between classes class B extends A{ } interface C{ } interface D{ } //Multiple ...

1, What is an interface An interface is like a template. There are methods without content in the interface. If a class uses an interface, it must declare the methods in the interface. Let's continue to take LOL games as an example: Some heroes of LOL can use physical attack, some can use magic attack, and some can use both attacks. Therefore ...

1 Introduction to generator Building in Python iterator You must implement a class with iter() and next() methods to track the internal state and raise StopIteration when there is no return value. The Python generator is an easy way to create iterators. Simply put, a generator is a function that returns an object (iterator) that can be iter ...