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I'm afraid I lost the SpringBoot project specification sorted out a year ago. After all, I wrote it carefully at that time, and now it's posted on the blog.1. Application division specificationDuring the development of application system, the back-end service needs to consider dividing multiple SpringBoot modules according to the division princ ...

Asynchronous framework Why use asynchronous framework? Solve what problem? In the development of spring boot, it is generally called synchronously. However, there are often special businesses that need to be processed asynchronously. For example: register a new user, send 100 points, or place a successful order, send a push message, etc. ...

Usage scenario 1. The order was placed successfully and was not paid for 30 minutes. Payment timeout, automatic cancellation of order 2. The order was signed, and no evaluation was conducted 7 days after signing. The order timeout is not evaluated, and the system defaults to high praise 3. The order was placed successfully, the merchant did ...

Problem point 1. What if the message fails to be sent (due to the network, the broker hangs up)? How does the sender achieve high availability? 2. How to select the message queue, that is, which message queue does the producer send messages to? 3. Why design a broker failure delay mechanism separately? Producer message retry When the produce ...

When a user enters a username and password to submit data to the background database for query, if there is a corresponding username and password, the login is successful. After successful login, the user jumps to the homepage index of the system. HTML page. Jump is done on the front end using jquery 1. Logon-Persistence Layer 1.1 Planning sql ...

Introduction: Hello, I'm brother Feng, 🌟 IT migrant workers on the front-line Internet 📝 Senior interviewer 🌹 Founder of Java flea classroom. He has many years of front-line R & D experience and has worked in iFLYTEK, meituan, Ping An and other companies. There is a sideline team formed by its own small partners in Shanghai. At present, ...

catalogue What does the advanced part include? Release confirmation of springboot version Confirmation mechanism scheme Code architecture diagram Modify profile Add configuration class Message producer Callback interface Message consumer result Fallback message Configuration yml file Callback interface optimization result Backup ...

preface There is an annotation @ Configuration in the Spring framework that appears frequently. If you still feel unfamiliar, we can go to the Spring boot autoconfigure package of SpringBoot. You can find that each Configuration class must have an @ Configuration annotation, in which there is an attribute proxyBeanMethods. What is its function ...

In both Spring and SpringBoot development, the PostConstruct annotation is frequently used. It is usually used for some actions completed by Bean initialization. In the project code, the configuration will be read from the configuration center, and then initialized to the specified Bean. For other places that need to obtain the configuration d ...

5. Upload your Avatar 1. Upload Avatar - persistence layer 1.1 sql statement planning update t_user set avatar = ?,modified_user = ? ,modified_time = ? where uid = ? 1.2 Design interfaces and abstract methods UserMapper interface to define an abstract method for modifying user avatars /** * * @param uid * @param avatar * @param modifiedUse ...