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1. What is a business? Database transaction is simply to operate several different SQL statements as a whole, either all successful or all failed. It has four characteristics: atomicity, consistency, isolation and persistence. Spring transaction is a transaction processing mechanism encapsulated in database transaction. It has two manageme ...

Author: Han Xinzi@ShowMeAITutorial address: http://www.showmeai.tech/tuto...Article address: http://www.showmeai.tech/article-detail/83Notice: All Rights Reserved. Please contact the platform and the author for reprint and indicate the sourcePython 3 data structureThere are a large number of data structures and containers in Python for programm ...

1, PrefaceSpringBoot 2.6.x does not recommend the use of circular dependency, which is good news. Springboot gradually guides developers to write standard code from the bottom. At the same time, it is also sad news. The application scenarios of circular dependency are too wide.If you upgrade from a lower version to 2.6 x. Then the first problem ...

preface GPS series - Android terminal, github project address tag: gps_mine Android mobile terminal mainly uses Gaode map positioning, uploads positioning information in the background, and then tries to keep it alive as much as possible. It includes two small functions: 1. Upload positioning information; 2. Simulate positioning information ...

vue3-cli4 Warehouse address = = = = > Reference address Project setup yarn install Compiles and hot-reloads for development yarn serve Compiles and minifies for production yarn build Run your unit tests yarn test:unit Lints and fixes files yarn lint Customize configuration See Configuration Reference. Frame description Se ...

prefaceIf you think the article is helpful, please leave some praise and collection. Pay attention to xiaoleng and read more dry goods learning articles ★ this is Xiao Leng's blog ‡ see the column for good articles on high-quality technology The official account of the individual, sharing some technical articles, and the pit encountere ...

springboot: common annotations 1, spring common annotations Package scanning + Component annotation @Component: Refers to various components @Controller,@Service,@Repository Can be called@Component. @Controller: Control layer @Service: Business layer @Repository: Data access layer selector @Conditional，Only when the specified condit ...

Playwright is a new generation released by Microsoft in early 2020 automated testing Compared with Selenium, which is the most commonly used tool at present, it can automatically execute the automation operations of mainstream browsers such as Chromium, Firefox and WebKit with only one API. As a pure automation tool for Python language, it can ...

Even if you do web development, you will encounter various algorithm problems that need to be solved. This paper extracts some classic hand training algorithms and provides relevant reference answers, hoping to be helpful to you In addition, I have collated and collected interview knowledge points from more than 20 companies for more than 20 ...

Author: Han Xinzi@ShowMeAITutorial address: http://www.showmeai.tech/tutorials/56Article address: http://www.showmeai.tech/article-detail/80Notice: All Rights Reserved. Please contact the platform and the author for reprint and indicate the source1.Python collectionA set is an unordered sequence of non repeating elements.You can use braces {} o ...