Programming VIP

Getting started with SpringBoot Create a SpringBoot project: file new project, click Spring Initializr on the left in the figure, and then just fill in the project name and other information. After creation, a startup class of SpringBoot project will be automatically produced: @SpringBootApplication public class SpringbootDemo01Application ...

First, what is MyBatis? MyBatis is a state-of-the-art persistence framework that supports custom SQL, stored procedures, and advanced mapping. MyBatis eliminates almost all JDBC code and manually setting parameters and retrieving results. MyBatis can use simple XML or Annotations to configure and map primitives, mapping interfaces, and Java PO ...

Process oriented & object oriented Process oriented The steps are simple and clear. What to do in the first step and what to do in the second part... Facing the process is suitable for dealing with some simple problems Linear problem object-oriented Birds of a feather flock together, the thinking mode of classification. When think ...

problem Today, I looked at the previous project written with shiro framework and looked at the source code carefully. Suddenly, I was curious. We usually use securityutils getSubject(); Method to obtain the of the current user. This class is a self-contained class under shiro, that is, shiro has encapsulated the logged in object to the i ...

Simple interface implementation Basic knowledge understanding package In the previous study, we simply mastered the function relationship between classes and objects, and between classes. For the sorting of different code files, we put forward the concept of package, which can be understood as a folder to classify code files and facilitate fu ...

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it target Our local projects should be released through Jar package or used by others. Today, I recorded the packaging process of the project completed by le idea and maven. Using Idea+Ma ...

The content of the article is reproduced from the official help document of IDEA: File template variables | IntelliJ IDEA Translated by Google Predefined template variables The following predefined variables are available for file templates: volatile describe ${DATE} Current system date ${DAY} Current date of each month ${DIR_PAT ...

1. Dynamic SQL 1.1 what is dynamic SQL? What is dynamic SQL? Dynamic SQL refers to generating different SQL statements according to different conditions. Usually, we operate some different SQL statements, which are directly changed in the code, which is very troublesome. It is very convenient to use dynamic SQL of Mybatis. Using t ...

Integration case based on SSMP I Implementation case scheme analysis Case making process Basic CRUD function Call the page and make all functions after confirming asynchronous submission Add paging function and query function II Create backend project environment 2.1 creating modules Create module First, add web - "Spring Web" ...

Deep understanding of JVM (2) -- memory structure (2) 4. Pile definition Objects created with the new keyword are placed in heap memory characteristic The safety of all threads in the heap needs to be consideredThere is a garbage collection mechanism Heap memory overflow java.lang.OutofMemoryError : java heap space. Heap memory over ...