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Anemia model We generally use three-tier architecture for business development: Repository + Entity Service + BO(Business Object) Controller + VO(View Object) In the three-tier architecture business development, we often use the development mode based on the anemia model. Anemia model refers to th ...

1, Scenario introduction JRBM has a demand for detecting the online situation of team Websocket: The existing concurrenthashmap < teamid, jrbmsession > map, jrbmsession includes session and lastlivetime. The front end sends heartbeat to the service end through ws connection every 3s. After re ...

Introduction to 01 requests Library of Python web crawler and information extraction notes Notes on Python web crawler and information extraction 02 "there is a way to steal" from web crawler Python web crawler and information extraction notes 03 requests library web crawler practice (5 i ...

Function currification The concept of corrilization: only a part of parameters is passed to the function to call it, and it returns a function to process the remaining parameters Take an example: var add = function(x) { return function(y) { return x + y; }; }; var increment = add(1); var addT ...

2, Priority of dependent properties Because WPF allows us to set the values of dependent properties in multiple places, we have to use a standard to guarantee the priority of values. For example, in the following example, we set the background color of the button in three places, which setting will ...

1, Ask questions When spring MVC encapsulates custom type objects, JavaBean s are bound to the data submitted by the page one by one. Here's what you need to know: 1) all data submitted by the page are strings 2) attributes in JavaBean s, such as Integer age; When binding data, the following oper ...

1. Implementation principle of vue Vue.js uses the attribute feature functionality provided by ES5, combined with the publish-subscribe mode, to publish messages to subscribers and trigger corresponding listening callbacks when data changes through Object.defineOrototype() to define set and get attribut ...

1 Leader Say nothing but read the manual guidelines first The manual has helped us summarize common problem scenarios, but we still need to dig into the null pointer problem in order to get it right. 2 What is the null pointer in the world? 2.1 Official Resolution A null is passed in when the app ...

Getting started with javaScript Article directory Getting started with javaScript 1, Basic grammar What can I do Notes Identifier, literal quantity and variable naming specification data type Data type conversion, operator 2, Common methods of string and array Character method Array method 3, ...

In SpringBoot, there are two different formats for configuration files, one is properties and the other is yaml. Although properties files are common, yaml is more concise and uses more scenarios than properties, and many open source projects are configured using yaml (for example, Hexo).In addition ...