Programmer Think

preface In spring IOC, the well-known BeanScope includes singleton and prototype. The scope of the Bean affects the creation method of the Bean. For example, when creating a Bean with Scope=singleton, the IOC will save the instance in a Map to ensure that the Bean has only one instance in an IOC context. Spring cloud adds a scope of refresh ra ...

jdk1.5 start supporting annotations, spring 2 5 start comprehensive direct annotation Preparation: inject attributes by annotation 1. Introduce the context file header into the spring configuration file <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.o ...

SpringBean container: Beans are java objects. The container is responsible for the management of the whole life cycle of java objects, including creation, modification and destruction IOC control reversal IOC: it's an idea IOC container: the implementation container of IOC thought DI One of the ways to implement IOC, dependency injection, is ...

advantage: Spring is an open source, free framework (container)Spring is a lightweight, non intrusive frameworkInversion of control (IOC), aspect oriented programming (AOP)Support transaction, support for framework integration jar packages to import: <!-- Importing this package will directly import other packages, including core,conte ...

Common dependency 1. Pring context dependency <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.3.13</version> </dependency> 3.junit <dependency> <groupId>junit</groupId> <artifactId>junit</artifactI ...

introduction With the growth of business volume, the cache schemes used generally go through the following steps: 1) query DB directly without cache; 2) Data synchronization + Redis; 3) Multi level cache has three stages. In the first stage, direct DB query can only be used in small traffic scenarios. With the increase of QPS, cache needs to ...

1. spring overview 1.1 what is spring Spring is a lightweight open source framework for layered Java SE/EE application full stack, with IoC (Inverse Of Control) and AOP (Aspect Oriented Programming) as the kernel. It provides many enterprise application technologies such as presentation layer spring MVC, persistence layer spring JDBC tem ...

preface In this chapter, I will explain the specific load balancing rules. First, I will express my personal understanding of the spring cloud loadbalancer load balancing rules: Get the corresponding instance collection according to the service ID, which contains some rules: get from the registry? Same region priority? Cache? etc.Select t ...

6. Spring Boot Security Framework 6.1 Understanding Spring Security Spring Security is dedicated to providing Authentication and Authorization management for Java applications. Certification: This is mainly to solve the problem of who I am by providing evidence to prove that you are the person you say. Authorization: This is mainly to ...

Spring Bean management xml based configuration mode bean configuration requires spring managed classes id generated object name Class full class name name object alias, which can be multiple scope: Singleton (default): there is only one bean instance in Spring, singleton mode Prototype: when the prototype getBean(), new Bean() Request: each h ...