Programmer Think

Finally to AOP, the front did not understand must follow the code to read more, otherwise this article is easy to get lost! If you don't say much, you can't change without its sect. First, the picture above. AOP sequence diagram Source code analysis 1. Initialization phase - > method of matching tangent points Go back to abstractautowi ...

@GetMapping, @ PostMapping, @ PutMapping, etc.: they are equivalent to RequestMapping(value = "/ xxx", method = RequestMethod.GET) or RequestMapping(value = "/ xxx", method = RequestMethod.POST), that is, the abbreviation of the qualified request method. Request mapping principle What is request mapping? Personal understan ...

✅ Spring framework learning    this project mainly summarizes my learning process of Spring framework, which will include some experience, source code practice, and my understanding of some knowledge points, so as to facilitate continuous learning, timely and efficient review and review on the way of continuous learning, and summari ...

Girlfriend: I want my own annotation, you teach me! moon: eh? Why do you suddenly want your own annotation? Girlfriend: none of your business! "Break up"! moon: No, no, no, no! I teach you! moon: look at my treasure. You're good at spring. Let me show you Autowired first @Target({ElementType.CONSTRUCTOR, ElementType.METHOD, Elem ...

Feign declarative remote call 1. Introduction Feign is a declarative HTTP client. Its purpose is to make remote calls easier. Feign provides the template of HTTP request. By writing a simple interface and inserting annotations, you can define the parameters, format, address and other information of HTTP request. Feign integrates Ribbon (l ...

1. New Spring5 Framework Functions 1. Version Compatibility The code for the entire Spring5 framework is Java8-based, runtime-compatible with JDK9, and many unsupported classes and methods are removed from the code base. 2. Log Encapsulation The Spring5 framework comes with a generic log encapsulation (1) Spring 5 has removed Log4jConfigLi ...

From the overall logic of the JVM in the previous article, this article will talk about the class loading mechanism Review some working models: one we wrote ourselves java file, compiled and generated Class file, will The class file is loaded into the JVM according to The different data information of the class binary file is allocated to ...

1. Reflect transactions through examples 1.1 Build two tables from a database The sale table stores the sales records, the id represents the number of the sales records, and the primary key is the automatic growth. gid is the number of goods purchased; num is the quantity of goods purchased. Initially, there is no data in the sale table. ( ...

1. General Service extraction Through the idea of general Mapper, that is to extract some duplicate code and make it into a framework or tool. Then, when a Dao needs to be used, it can be solved by directly inheriting this. Analyze how this general Mapper is made. It can be seen that Mapper in our Dao layer does not define any methods, b ...

BeanDefinition BeanDefinition represents the definition of a Bean. There are many attributes in BeanDefinition to describe the characteristics of a Bean. For example: class, indicating the type of beanScope, indicating the scope of the bean, singleton or prototypelazyInit, indicating whether the bean is lazy to loadinitMethodName, indicat ...