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1. Introduction 1.1 what is mybatis ● MyBatis is an excellent persistence layer framework ● it supports custom SQL, stored procedures and advanced mapping. ● MyBatis eliminates almost all JDBC code and the work of setting parameters and obtaining result sets. MyBatis can configure and map primitive types, interfaces and Java POJO s (Plain Old ...

Invokebeanfactoryprocessors is a very important method in Spring startup. We need to understand several concepts before parsing the source code of this method. 1, BeanDefinition 1.1. Instantiation of common objects We know that ordinary java files will be compiled into java files when Java runs When we instantiate an object into memory, we u ...

Only in cluster mode mongo Can be used changeStream The function of, This function is mainly to monitor in real time mongo Changes to the database, And obtain the changed information, changeStream The principle is to monitor all the time mongo of opLog Log changes to this file, To read this file, as we all know, we have mongo The database will ...

Personal profile The author is a junior from Heyuan. The following notes are some shallow experience of the author's self-study road. If there are mistakes, please correct them. In the future, we will continue to improve our notes to help more Java lovers get started. SpringBoot+JDBC 1. Import JDBC and mysql dependencies In POM XML import t ...

SpringBoot notes 01 – Spring IOC 1. IOC 1.1 what is IOC The full name of IOC is Inversion of Control, which is a design concept. In the traditional Java SE code, objects are created through new inside an object, which is the program's initiative to create the objects to rely on. The idea of IOC is to design a container to create these ...

Reading guide This paper records the process of deploying Apollo according to the official Apollo documents. The place worthy of reference is the pit. Assuming you have a certain understanding of Apollo, you won't introduce Apollo itself too much. For documents, please refer to: https://ctripcorp.github.io/apollo/#/zh/README The deploye ...

premise Our SpringBoot project relies on Dubbo, RocketMQ, Nacos, etc. occasionally one day, we found that we didn't register with SpringBootAdmin after startup, so we checked the reasons, searched online and found this article The springboot project starts and runs normally, but the port cannot listen for events and solutions The situation is ...

Shiro takes notes, Xiaobai records the learning process, and the boss takes a detour I What is Shiro Shiro, like Security, is a Security framework. It can help us realize authentication, authorization, MD5 encryption, caching and other functions. Shiro has three elements: Subject, Security Manager and Realm. Subject: the current subject ...

Original link https://cloud.tencent.com/developer/article/1582434 1. Preface We often use timed tasks in daily project development. For example, make statistics and settlement in the early morning, start planning activities, automatically change the unpaid orders that exceed 24 hours to cancelled status, and automatically change the orde ...

registerListeners() of Spring source code and publish subscribe modeHello, I'm classmate Tian, a programmer.Today, let's explain the registerListeners() method in the refresh() method, which is often referred to as the publish subscribe mode of Spring. This paper first gives an example of publish subscribe mode, then explains the principles of ...