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Forwarding official account: IT Ranch Tactical Analysis: There must be more than one timer in the actual development project, which needs to be used in many scenarios, and the problem brought by multiple timers is how to avoid the conflict of multiple timers Usage scenario: Our order service generally has an order to be paid, which has a ti ...

SpringBoot solution cross domain, 3 solutions! Problem background: I have encountered cross domain problems in development and queried many solutions on the Internet. Here is a summary. Introduction to CORS: CORS is a W3C standard, The full name is "cross origin resource sharing". It allows the browser to send XMLHttpRequest reque ...

If you add, you have Clear cache. @Cacheable cannot set the expiration time directly. It should be used in combination with @ CacheConfig to set the expiration time Function description @The Cacheable annotation is used on a method to indicate that the return result of the method can be cached. That is, the returned result of this method wi ...

summary Springboot changes the complicated configuration files of spring MVC into parametric configuration, which makes users feel great convenience. Therefore, if you only use the off the shelf spring boot function, there is not much technical requirement. Then, based on the principle of improving yourself and writing code as gracefully as po ...

This article is the second part of the introduction, packaging and deploying the project to the server, and modifying the relevant configuration. 192.168.38.132 -front end 192.168.38.133 -back-end 192.168.38.134 -back-end The three servers create the / root/workspace directory respectively 1, Front end 192.168.38.132 deployment Fir ...

You can refer to the API of learning ElementUI framework - > API for ElementUI framework 1. Route nesting Study of the last note Administrator login permission assignment Click the operation menu on the left to generate a specific management form; You can imagine that the basic layout of the open is like this Here, several d ...

The requirement is to add a picture verification code when sending SMS verification code. 1. Code implementation Tool class for generating verification code pictures -- verifyutils java package com.lmc.utils; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.LinearGradientPaint; import java.awt.P ...

Shiro core object Subject is the subject. The external application interacts with the subject. The subject records the current operating user. The concept of user is understood as the subject of the current operation. It may be a user requested through the browser or a running program. Subject is an interface in shiro, which defines many meth ...

1, Introduction Technology stack: Java: 1.8 SpringBoot: 2.2.2.RELEASE Netty: 4.1.32.Final For basic understanding, refer to the following article: https://blog.csdn.net/DreamsArchitects/article/details/120177336 Current time: 17:02:38, December 31, 2021 As the last year of 2021, blog. 2, Question 2.1 start server mode Previously, the ...

Implement AbstractAuthenticationToken custom authentication object In the spring security Authentication process, the core object is Authentication, which is used to store various basic information of the subject (such as user name, password, Department, etc.) and Authentication information of the subject (such as interface permission). ...