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One of the issues to be discussed in this article is how to set up different database data sources for Spring and Mybatis? be careful. Under normal circumstances, you must set the same database data source for Spring and Mybatis Case code location https://github.com/infuq/spring-framework/tree/main/infuq-t/src/main/java/com/infuq/mybatis Cas ...

This article is excerpted from Spring 5 core principlesThe Spring IoC container also has some advanced features, such as pre initializing beans using the lazy init attribute, generating or modifying Bean objects using factorybeans, and managing Bean declaration cycle events using the BeanPostProcessor post processor during Bean initialization.1 ...

In daily project development, singleton pattern is the most commonly used design pattern. Projects often need to use the method of Service logic layer to realize some functions in singleton pattern. Usually @ Resource or @ Autowired may be used to inject instances automatically. However, this method will cause the problem of NullPointException ...

First, let's look at the main configuration class of SpringBoot: @SpringBootApplication public class StartEurekaApplication {     public static void main(String[] args)     {         SpringApplication.run(StartEurekaApplication.class, args);     } } Click @ SpringBootApplication to see that @ SpringBootApplication is a composite annotation. ...

1 Concept Spring is an open source framework, which originated from a lightweight Java development framework rising in 2003. For a detailed overview, please refer to Baidu Encyclopedia Spring is created to solve the complexity of enterprise application development. The core of spring is inversion of control (IOC) and aspect oriented (AOP) ...

text What is BeanDefinition? BeanDefinition, which is too important, is the core storage structure. What does spring do? After spring came out, it mainly focuses on IOC containers. What are the containers for? Beans? What are beans? I don't know. Anyway, beans are taken out of spring. Since you don't know, you always know what characteristics h ...

1, Target Does the Bean object managed by Spring have to be the Bean created by our class? Will the created Bean always be a singleton? Can't it be a prototype pattern? In the MyBatis framework we use under the collection Spring framework, its core function is to enable users to perform CRUD operations on the database by means of xml or annota ...

Spring MVC unified exception handling In spring MVC application development, whether it is the operation of the underlying database, or the operation of the business layer or the control layer, it is inevitable to encounter all kinds of predictable and unpredictable exceptions to deal with. If each process needs to handle exceptions separately ...

When we develop the spring boot web project, we need to use JSP for view layer functionality. At this time, we will find a problem. This JSP page is very original and cannot use complex tags. We need to write business code in the most original java+jsp mixed-up way. It is inconvenient to use, and for convenience we need to import third-party ta ...

3. Initialization process of spring IOC container In short, the initialization of IoC container is started by the refresh() method introduced earlier, which marks the official start of IoC container. Specifically, this startup includes three basic processes: Resource location, loading and registration of BeanDefinition. The first process is t ...