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The principle or source code of each technology stack we usually use is more or less related to the concept of design patterns. It can also be said that only by better mastering design patterns, our code can be more standardized, concise and more efficient. Secondly, most of the design patterns are repeatedly summarized through the experience ...

Other jar s in spring security provide other advanced authentication technologies, such as LDAP authentication, OpenID authentication, implementation options in authentication, etc. But here, I'll focus on Web application authentication. In the servlet configuration xml file or application context xml, you need to specify the following URL in ...

3.3,SqlSessionFactory SqlSessionFactory has multiple methods to create SqlSession instances, including the following two: SqlSessionFactory.openSession: a transaction will be started by default, but the transaction will not be submitted automatically, which means that the transaction needs to be submitted manually before the update operati ...

Introduction There are still many elimination games in Python, and mumuzi has pushed many before~ 🍒 Source base 🍒—— Click on my avatar in the upper right corner of the home page and get the source code for free 🍒 The source code of previous periods is also dropping 🍒 For example, the ever-changing Xiaole, remember? Today, ...

1, Database operation =========================================================================== Note that each time the client inputs a statement, it must be added; 1.1 display database show databases; 1.2 create database --format create database [Database name]; create database test; Note: you cannot create a database ...

} else { /** * The following code shows that only one of the three attributes of url resource class can be selected, otherwise an error will be reported */ throw new BuilderException("A mapper element may only specify a url, resource or class, but ...

The term "reactivity" refers to the programming model built around responding to change, availability, and processability - network components respond to I/O events, UI controllers respond to mouse events, resources are available, and so on. In this sense, non blocking is reactive because we are now in the mode of responding to notifi ...

for (i in 0..10) { println("Asynchronous request executing: getToken :$i") delay(100) } return "ask" } suspend fun getResponse(token: String): String { for (i in 0...10) { println("asynchronous request executing: getresponse: $token $I") delay(100) } return "response" } fun setText(response: String) { printl ...

### [] () * * [key points]** **Collection: Disordered, repeatable** **List Series collection: ordered, repeatable, indexed.** – ArrayList: The added elements are ordered, repeatable and indexed – LinekdList: The added elements are ordered, repeatable and indexed **Set Series collection: the added elements are unordered, non re ...

===== @Target It is added to the Annotation through @ target to explain the object scope modified by Annotation: Annotation can be used for packages Types (classes, interfaces, enumerations, Annotation types), type members (methods, construction methods, member variables, values), method parameters and local variables (such as loop variable ...