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Catalog step1 runtime environment step2 installation step3 configuration step4 test ZBar is an open source two-dimensional code (including barcode) decoder that recognizes barcodes/two-dimensional codes from video streams, image files, handheld scanners and video devices (such as cameras). It supp ...

How to use color icon iconfont in applets International practice, starting with the following: outline In general, when we develop, we use iconfont to manage icons in the project, which is convenient and fast.But when I need the applet to migrate the project, I encounter a lot of questions.How is th ...

Preparation Local runtime environment JDK : 1.8+ MySQL : 5.6.5+ Maven : 3.6.1 IDE : IntelliJ IDEA Apollo's table structure uses multiple default declarations for timestamp, so it requires more than 5.6.5 versions. From the official warehouse https://github.com/ctripcorp/apollo Fork comes out of its own warehouse https://github.com/wupeixuan ...

Recently, users occasionally reported that some HTTP interfaces had timeout problems, while Trace monitoring on the web service side did not have any abnormal situations such as HTTP return value 503. This usually happens when the web container has a problem and the client connects to it. Arthas is an open source Java diagnostic tool for Aliba ...

The original is in my github Chinese, welcome to subscribe We usually write React as follows: class HelloMessage extends React.Component { constructor(props) { super(props); this.handleClick = this.handleClick.bind(this); //Binding this } handleClick(){ console.log( this ) } render() { const { count } = this.state ...

Article directory JPG Picture Format Compression modes and steps JPG file structure libjpeg Encoding and Decoding Jpeg Pictures JPG Picture Format JPG (Joint Photographic Experts Group) is a commonly used lossy compressed image format. The c ...

SpringBoot e-commerce project mall (20k+star) address: https://github.com/macrozheng/mall abstract This paper mainly parses the function related tables of order return and the reason of order return, using the form of database table and function comparison. Order Return Related table structure Order Return Request Form Mainly used to store mem ...

Spring Security Analysis (6) - Development and Principle Analysis of Single Sign-on (SSO) Based on JWT When learning Spring Cloud, when encountering the related content of authorized service oauth, he always knows half of it, so he decided to study and collate the content, principle and design of Spring Security, Spring Security Oauth2 and othe ...

Preface: how to realize a deep copy of js This is an old-fashioned question, but also in the process of job-hunting high-frequency interview questions, the investigation of knowledge points are very rich, this paper will make a shallow-to-deep comb of the difference between shallow and deep copies, implementation and so on. The Difference betwe ...

1. Background Since business functions require access to IM (Instant Chat) functionality, the initial thought was to use WebSockets to achieve this functionality. It was natural to trick (haha) that the server version is too low to support the wx protocol (and WebSockets are no longer supported) and have to look for third-party services becaus ...