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See the previous document for the basic environment https://blog.csdn.net/qq_45745830/article/details/121624158?spm=1001.2014.3001.5502https://blog.csdn.net/qq_45745830/article/details/121624158?spm=1001.2014.3001.5502 Introduction to distributed task scheduling Many times, we need to execute some programs regularly to complete some scheduled ...

historical background With the rich and colorful Android native environment, many architectures have been born, such as MVC, MVP, MVVM and MVI. However, using these architectures, we have to create many class files (the project structure will be clearer). In MVC, we will create layout files for Activity/Fragment, Model, Controller and View, an ...

Continue to adhere to the original output, click the blue word to pay attention to me Author: Xiao Fu GeBlog: https://bugstack.cn ❝ Precipitate, share and grow, so that you and others can gain something! 😜 ❞ catalogue 1, Foreword 2, Demand purpose 3, Case development ...

Example method         An instance method is a method that needs to create an object of its class before calling. To invoke an instance method, we must create an object in which its class is defined.   Memory allocation:           These methods themselves are stored in the permanent generat ...

Sequential structure The basic structure of Java is sequential structure. Unless otherwise specified, it will be executed sentence by sentence in order. Sequential structure is the simplest algorithm structure. Between statements and between boxes, it is carried out in the order from top to bottom. It is composed of several processing steps ...

1, Improvement from JDBC to Mybatis (1) What is Mybatis? MyBatis is an excellent persistence layer framework that supports customized SQL, stored procedures, and advanced mapping. MyBatis avoids almost all JDBC code and manually setting parameters and getting result sets. MyBatis can use simple XML or annotations for configuration and native ...

Encapsulate MyBatis   Output results resultType Resulttype: execute sql to get the type of ResultSet conversion, using the fully qualified name or alias of the type. Note that if a collection is returned, it should be set to the type contained in the collection, not the collection itself. resultType    And resu   ltMap can ...

1. Array Select sort Train of thought analysis Disadvantages: frequent exchange and waste of time Improved version selection sorting Improvement: add a subscript of the minimum value of mindex record //Improved version selection sorting for (int i = 0; i <arr.length - 1; i++) { //i is set as the reference positi ...

Reference course: Mr. Chen Muxin's "Spring Security practice" Create spring boot project There are many ways to create a Spring Boot project through the Intellij IDEA. The easiest way is to use the Spring InitializrTools.Spring Initializr allows us to select some common project dependencies in advance. Here, we choose Security as the ...

1, If Else… val x = 5 val s = if (x > 0) 1 else -1 // s type is Int val m = if (x > 0) "positive" else -1 // Public super type Any with s type String and Int // In Scala, each expression should have a value. If the else part is missing, the following statement is equivalent to: if (x > 0) 1 else(), which returns a null ...