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preface For students engaged in java development, spring affairs must be familiar. In some business scenarios, the data of multiple tables needs to be written simultaneously in one request. In order to ensure the atomicity of operations (success or failure at the same time) and avoid data inconsistency, we generally use spring transactions. ...

Grasp the small tail at the end of October to explore how the internal fields of SpringBean inject multiple types There is often a small problem around me. How does Spring load field characters? Why does Spring support so many types such as Collection, List, Map and String? Are there any tips worth learning in the process of Spring injecti ...

Copyright notice: This article is the original article of CSDN blogger "Emine Wang", which follows the CC 4.0 BY-SA copyright agreement. Please attach the original source link and this notice for reprint. Original link: https://blog.csdn.net/a718515028/article/details/72457436 Raising questions In practice, we often encounter on ...

In our daily work, we often encounter the function of operating Excel, such as exporting an Excel report of user information or order information. You must have heard of POI, which can be realized. But the API implemented by POI is really troublesome. It needs to write line by line parsing code (similar to Xml parsing). Today, I recommend a ver ...

Spring source code analysis - beanfactoryprocessor The blogger's technology is limited, so this article will inevitably make mistakes. If you find it, please comment and point it out in a private letter. Thank you The beanfactoryprocessor interface is an extension point for beans provided by Spring. Its sub interface is BeanDefinitionRegistry ...

1. What is circular dependency? Bean A depends on B, and Bean B depends on A. in this case, circular dependency occurs. Bean A → Bean B → Bean A Circular dependencies caused by more complex indirect dependencies are as follows. Bean A → Bean B → Bean C → Bean D → Bean E → Bean A 2. What is the result of circular dependency? When Spring is lo ...

Preface: This article mainly introduces the differences between @ Configuration and @ Component as Configuration classes in detail. It is introduced in great detail through example code, which has certain reference and learning value for everyone's study or work. Friends who need to learn together with Xiaobian 1. Class of @ configura ...

The importance of transactions is self-evident. Spring also provides very rich support for transactions, with all kinds of supported properties. However, many small partners know that there are two properties: Isolation Transmissibility 1. What is a transaction Database transaction refers to a series of operations performed as a single lo ...

catalogueWhat is Bean managementTwo ways of Bean managementxml based approachCreate objects (xml based)Injection properties (xml based)Dependency injection (DI)Injection using parameterized constructsp namespaceInject special type attributesInject external bean sInject internal bean sCascade assignmentInject collection type propertiesInject col ...

Course objectives Build MyBatis development environmentComplete the operations of adding, deleting, modifying and querying a single table based on annotationsComplete the operations of adding, deleting, modifying and querying multiple tables based on annotationsComplete the operations of adding, deleting, modifying and querying a single table ...