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I. yaml file introduction yaml is a special language for writing configuration files. 1. yaml file rules Case sensitive; Use indents to represent hierarchical relationships; Indent with spacebar instead of Tab The number of indented spaces is not fixed, only the left side of elements of the same level needs to be aligned; The strin ...

A function, also known as a method, is a piece of code used to implement a specific functionFunction to improve code reusabilityFunction must be called to executeThe variables defined in the function are local variables. Local variables can only be used in the function and cannot be used outside the functionA function does only one thing import ...

I. public return class (defined according to the needs of the project, consistent with the normal request data return result class) Note: please expand the generic return class yourself. This article is only an example and only lists one non generic return class. EnumAppCode is an enumeration of error codes. Please define it yourself. usin ...

I. what is YAML YAML is a special language for writing configuration files, which is far more convenient than JSON format. The design goal of YAML is to facilitate human reading and writing. YAML is a lighter file format than XML and JSON, and it's simpler and more powerful. It can express structure through indentation. Does it sound like a ...

First, import the jar package, commons-codec.jar. You can use maven or go to the maven official website to download the jar https://mvnrepository.com/artifact/commons-codec/commons-codec/1.12 <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version ...

The button changes the background as you press: First write a selector.xml: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <!-- Specify picture when pressed--> ...

Introduction to Spring Cloud Alibaba Sidecar Since spring cloud Alibaba version 2.1.1, the spring cloud Alibaba sidecar module has been added as a proxy service to indirectly let other languages use spring cloud Alibaba and other related components. Through the route mapping with the gateway, the service can be obtained, and then the Ribbon can ...

Preface   What's the best brand of bread to sell? What is the most popular taste? I believe that every friend who likes bread will care about these problems. By crawling the bread data of Jingdong, on the one hand, this paper answers all kinds of questions about bread before, on the other hand, it brings you a complete data r ...

First of all, wechat users need to log in automatically to check the session. If the session expires, log in again wx.checkSession({ success: function (res) { }, fail: function (res) { console.log("Need to sign in again"); wx.login({ success(res) { if (res.code) { ...

I. serialization module json module ''' Serialization: converting data types from python or other languages to string types json module: is a serialization module. json: Is a "third party" special data format. You can use the python data type -- json data format -- string -- File To use python data in ...