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Common condition annotation @ Conditional annotation in spring Basically, all extended class conditional annotations are extended based on this annotation. This annotation is from spring 4 Use after 0. It is generally used to limit whether the configuration class is effective or whether a bean needs injection. @Definition of Conditional //T ...

target After completing the prototype of Spring framework, we can now manually operate the definition, registration and property filling of Bean objects through unit testing, and finally obtain the object and call methods. However, there will be a problem here, that is, if you actually use the Spring framework, it is unlikely to let users crea ...

The beginning of Dr. Yan Hong's Book JAVA and patterns describes the Prototype pattern as follows: The prototype pattern belongs to the creation pattern of the object. By giving a prototype object to indicate the type of all created objects, and then create more objects of the same type by copying the prototype object. This is the purpose of t ...

This picture was created by Christian_Crowd stay Pixabay Publish on Hello, I'm looking at the mountain. As mentioned earlier Elegant use of enumeration parameters and Implementation principle , this article goes on to talk about how to use enumeration gracefully in RequestBody. This article will start with the actual combat and talk a ...

1. Create a search service (1) Create a module: (3) Introducing dependency <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0 ...

Spring IOC container - Bean management - based on XML 🎈🎈🎈 Spring framework overview Spring is a lightweight open source Java EE frameworkSpring can solve the complexity of enterprise application developmentSpring has two core parts: IOC and AOP IOC: inversion of control, leaving the process of creating objects to Spring for manageme ...

Project introduction spring cloud netflix provides a full set of support for microservices, including service registration and discovery, routing, load balancing, circuit breaker, etc. you can see the principles and usage Official website corresponding to spring The content of the official website is quite practical. You should pay attention t ...

1.Mybatis: First meet Mybatis: Introduction to MyBatis Environmental description: jdk 8 +MySQL 5.7.19maven-3.6.1IDEA Before learning, you need to master: JDBCMySQLJava FoundationMavenJunit What is Mybatis: MyBatis is an excellent persistence layer framework MyBatis avoids almost all JDBC code and the process of manually setting param ...

Data binding Introduction to data binding When executing the program, Spring MVC will convert and bind the information in the request message to the method parameters of the controller class in a certain way according to the different request parameters of the client. This process of connecting request message data with background method para ...

<!--Spring Boot--> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.6.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <!--eureka--> <dependency&g ...