Programmer Think

mybatis Dependency used (gradle) //mybatis dependency compile group: 'org.mybatis', name: 'mybatis', version: '3.5.6' // mysql compile group: 'mysql', name: 'mysql-connector-java', version: '8.0.22' // mybatis paging plug-in compile group: 'com.github.pagehelper', name: 'pagehelper', version: '5.2.0' Interface class { ...

When we use context to obtain beans, in fact, the bottom layer is the DefaultListableBeanFactory class of operation. This class is mainly divided into two parts: Registered bean: parse class and encapsulate it as beanDefinition object;Instantiate an object from beanDefinition. Let's first look at how to save data. beanDefinition object Prop ...

1, Pure Mybatis is integrated with Mybatis plus. 1. Import dependency <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt ...

@TOC Conditional annotation in springboot @Conditional The bean is loaded when a specific condition is triggered There are many sub annotations under this annotation, @ConditionalOnClass package org.springframework.boot.autoconfigure.condition; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java. ...

1.SpringBoot auto configuration - Condition-1 Condition is spring 4 The conditional configuration interface introduced after 0 can conditionally load the corresponding beans by implementing the condition interface @Conditional should be used with the implementation class of Condition (ClassCondition) ClassCondition public class ClassCondit ...

Preface (crazy God) In our work, we often use asynchronous processing tasks. For example, when we send mail on the website, the background will send mail. At this time, the foreground will make the response motionless, and the response will not succeed until the mail is sent. Therefore, we generally use multithreading to process these tasks ...

Based on Spring Boot 2.6.3, this paper summarizes the core points of interview answers at the end of the article. 1. What is automatic assembly When we use Spring Boot, we will automatically assemble the Bean into the IoC container. For example, when using Redis database, we will introduce the dependency Spring Boot starter data Redis. Af ...

Description of main functions: Administrator role View customer information, beverage management, view categories, order management and other functions. User role: Users log in and register, modify personal information, view the home page, view the classification of drinks, view hot drinks, view the details of drinks, view the shopping cart ...

Instance creation 1. Create annotations @ Controller, @ Service, @ Repository, @ Component 2. Extract tag object Realization idea ◆ specify the range and obtain all classes within the range ◆ traverse all classes, get the annotated classes and load them into the container How to get the class collection according to the package name? ...

catalogue preface Evolution of Java backend What is Spring boot? text Getting started with Spring boot summary raise a query How to effectively learn methods and technical consultants preface Evolution of Java backend In today's era when the Internet is so developed, the amount of data generated every day is countless. The back- ...