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About the definition of Example class? Mybatis-generator generates Criterion for each field and creates dynamic sql for the underlying mapper.xml. If there are more fields in the table, the example class will be very large. In theory, you can construct any filter condition you think of by using the exam ...

Note: Mybatis Plus version 3.0.7 only started using Custom SQL + [Query Wrapper], low version can not be used, or honest SQL for conditional splicing. 2.0. Source code analysis In the Wrapper < T > interface, there are the following methods /** * Get custom SQL to simplify custom XML comple ...

Preface Because the project requires that three data sources be used simultaneously in two projects, and then it's a toss-and-roll. I have seen many cases from the internet, but there are more or less problems. MyBatis, for example, can only be developed with annotations, not configurations. I think t ...

In the interface test framework I wrote before, MySQL was used to record various requests, responses, use cases, and so on. To improve the storage speed, I wrote a separate database storage service and deployed it on the servers on the internal network.When there is information that needs to be recorded, the information is sent directly to the ...

Articles Catalogue Integrating mybatis and spring 1. First, recall the steps to write the mybatis project 2.Spring integrates MyBatis [Preliminary preparation] The role of MyBatis-Spring: The required version of MyBatis-Spring: How to use MyBatis with Spring: [Example] Overall project structure: ...

1. What is BeanPostProcessor?When does it trigger?What can I do with it? 1. What is it? First it is an interface that defines two methods: public interface BeanPostProcessor { @Nullable //Trigger this method before all bean s are initialized default Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansExcept ...

In the last section, we talked about how spring boot 2 combines mybatis to add, delete and check mysql data, but we need to use xml configuration. Once xml configuration is involved, it will be more troublesome. Today, let's talk about a new method, which does not need to set up xml files, and the code ...

1.1. Requirements Query class information based on class id (with teacher's information) 1.2. Creating tables and data Create a table of teachers and classes. Let's assume a teacher teaches only one class. The relationship between teachers and classes is one-to-one. 1.3 sql statement CREATE TABL ...

I. Introduction of SSM Framework Architecture and Process SSM framework, usually refers to the integration of spring mvc+spring+mybatis three frameworks, spring mvc itself is part of spring, so there is no integration between the two. The main thing here is to integrate spring and mybatis framework, in fact, SqlSessionFactory object is handed ...

Recently, I've been busy, I haven't written a blog for a long time. Sorry, the springboot project used JPA standard. It was implemented by hibernate. The latest trend is to try to integrate mybatis with springboot. So I found the official documents to configure it. Here's the text.   First of all, introduce the development environment: ...