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We often see the use of @ ConditionalOnProperty annotation in the automatic configuration of Spring Boot. This article will take you to understand the function of this annotation. Use in Spring Boot In the source code of Spring Boot, for example, automatic configuration involving Http encoding, automatic configuration of data source type, etc., ...

The following content is the result of network excerpt and practice modification. If it is the same, please understand!!!!   1. First, the front-end page code: Where, < input type = "file" id = "file_input" name = "filepath" multiple = "multiple" / >, the multiple attribute needs to be set <styl ...

After the script using unittest framework is executed, an html report will be generated This report makes an html template in advance, writes the corresponding content to the template, and generates a final report. This report template will exist in the following path after passing the PIP install beautiful report: C: \ program files \ python37 ...

1. Preparation 1.1 register alicloud account Use personal Taobao account or cell phone number to open the account of Ali cloud, and pass the real name authentication (can be certified by Alipay). 1.2 free IoT Suite Product official website https://www.aliyun.com/product/iot 1.3 software environment Nodejs installation https://nodejs.org/en/dow ...

A simple example of Deferred class code in openTSDB source code details 1. example 1 1.1 code /** * simplest with only 1 defer * In the simplest case, there is only one defer */ public static void test1() { try { //Deferred deferred = new deferred(); - > no parameters are passed, and direct n ...

stay Reverse value transfer through proxy in iOS development In this paper, we analyze the use of proxy mode to reverse value transfer. In fact, there are some other ways, such as notification, Block, etc. compared with proxy, I personally think it is simpler, but we need to deal with the details, such as Block circular reference. ...

Abbreviation and event modifier for v-on of Vue instruction event modifier:. stop prevents bubbling. prevent block default events. capture use event capture mode when adding event listeners. self triggers the callback only when the event is triggered by the element itself (for example, not a child element). once event is triggered only once v- ...

Activity In an application, an activity can be used to represent an interface, the beginning of an activity, the start of an activity component, and the end of an activity represents the end of an activity's life cycle. activity status performance Resumed At the top of the stack, visible and interactive Paused State whe ...

How much can css animation do? Github has a very good animation project with 50000 stars! Project address: https://github.com/daneden/animate.css Online effect display: https://daneden.github.io/animate.css/ There is only one css file in the whole project of animate, and the use method is very simple ...

File traversal abstractWindows file traversal and process traversal are very similar. If you don't understand the process traversal suggestions, take a look at my previous two articles Traverse system process and Traversal system process module ! To traverse a file, you need to know the structure of Win32? Find? Data and the API GetCurrentDirec ...