Programmer Think

Mybatis personal summary notes 01 basic information Mybatis is the SQL mapping frameworkThis object can be mapped into a row of data in the databaseDevelopers only need to provide sql, process sql through Mybatis, and finally get the List collection or Java objectsMybatis is a semi-automatic ORM mapping tool, which is called semi-automa ...

APIJSAON (I: Introduction)backgroundDue to various wonderful abbreviations, chaotic naming, outdated documents, out of sync with interfaces, unstable or arbitrary changes of data types, hundreds or even thousands of chaotic status codes, all kinds of wrangling between the front end and the back end, cumbersome whole development process, long de ...

Analysis of the underlying source code of Aop in Spring (Part I) As the author becomes more and more lazy [I haven't updated my blog for a long time], I can't afford time to record or analyze some technical points alone, because the blog is still short to make readers willing to read it in their heart. 1, Aop application Dynamic agent ...

What is a transaction 1. What is a transaction Transaction refers to a set of sql statements, in which there are multiple sql statements It may be insert, update, select or delete. We hope that these multiple sql statements can succeed or fail. The execution of these sql statements is consistent and executed as a whole. 2. When do y ...

catalogue Spring circular dependency What is circular dependency? Under what circumstances can circular dependencies be handled? Basic introduction and the essence of circular dependency what？ The essence of the problem is actually two sum! How to get to getSingleton method Simple circular dependency (no AOP) Call getSingleton(beanName ...

Why do we need Docker Compose? Isn't it annoying to start containers one by one like this? Can you write a script to start the corresponding containers in order of dependency? ----Docker compose it's coming Docker Compose brief introduction Compose project is the official open source project of Docker, which is responsible for the ...

Spring Boot (IX) -- employee management system 18. Employee management system 18.1 preparation 18.1.1 front page Place the html page in the templates folderPut css, js and img into the static folder 18.1.2 entity class preparation Department public class Department { private Integer id; private String departmentName; public ...

Abstract: This paper will describe the interface isolation principle and Dependency Inversion Principle in SOLID principle. This article is shared from the Huawei cloud community "practice the design pattern of GoF 23: SOLID principle (Part 2)", author: yuan Runzi. In< Practice 23 design modes of GoF: SOLID principle (I) >In ...

Use of FactoryBean FactoryBean FactoryBean is an interface. The interface declaration is as follows: package org.springframework.beans.factory; import org.springframework.lang.Nullable; public interface FactoryBean<T> { String OBJECT_TYPE_ATTRIBUTE = "factoryBeanObjectType"; @Nullable T getObject() throws Exception; ...

1,IOC Inverse of Control – IOC, control reversal, reversing the control of the object to Spring! Using IOC can solve the problem of high coupling of programs Control reversal Suppose I need a function. In this function, I need to call the service layer, and then call the dao layer to get the data. Traditional Java EE development direc ...