Programmer Think

1. Overview Hello, I'm Ouyang Fangchao. Today's event is still related to swagger (to be exact, knife4j). In the SpringBoot project integrating swagger, the dependencies introduced are as follows: <!-- https://mvnrepository.com/artifact/io.springfox/springfox-boot-starter --> <dependency> <groupId>io.springfox</group ...

9 cases 9.1 requirements description The list of goods on the e-commerce platform is displayed. In addition to the basic information and description information of the goods, each list item also includes the store information to which the goods belong, as follows: The functions of this case are as follows: Add itemProduct paging queryC ...

Data structure and algorithm 1. Overview of data structure and algorithm 1.1 general Data structure is a subject that studies the way of organizing data. With programming language, there will be data structure Learning data structure well can write more beautiful and efficient code. Program = data structure + algorithm Data structure is th ...

1. General Reprint: Manual of facial classics Chapter 8 "LinkedList inserts faster than ArrayList? Are you sure?" 2. Data structure Linked + List = linked list + list = linked list LinkedList is implemented based on linked list. Data nodes are interspersed by two-way chains next and prev. Therefore, when inserting data, you do ...

First of all, we need to know that "Abstract class" and "Interface" are two mechanisms that support the definition of Abstract classes 1. Abstract abstract class So what is an abstract class in Java? In Java, due to polymorphism, a class can be inherited by multiple subclasses as a parent class. For example, the Student s ...

1. Overview of Java design patterns 1.1 purpose and importance of design mode (1) In software engineering, design pattern is a solution to the common (recurring) problems in software design. (2) Code reusability, readability, scalability and reliability are the characteristics of high cohesion and low coupling. 1.2 seven principles of d ...

1, Core knowledge of service fault tolerance 1.1 avalanche effect In microservice architecture, it is very common for A request to call multiple services. For example, when the client accesses service A, service A needs to call service B, and service B needs to call service C. due to network reasons or its own reasons, if service B or ser ...

JMM memory model 1. Computer structure Input device: our mouse and keyboard Memory: corresponding to our memory, cache The arithmetic unit and controller together constitute the cpu Output devices, such as display screens and printers. Let's focus on caching: 2. Cache In fact, when we say that computers are inefficient and slow, they ...

1, Pizza order 1. Create pizza Abstract class pizza //abstract class public abstract class Pizza { protected String name; public abstract void prepare(); public void bake(){ System.out.println(name + "baking"); } public void cut(){ System.out.println(name + "cutting"); } public void box(){ ...

2022Java learning notes 36 (object-oriented enhancement: abstract classes, abstract class cases) 1, Abstract class A parent class knows that all its subclasses need to complete a function, but the completion of each subclass is different. The parent class can only define the basic requirements of the function for a long time, and the speci ...