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Preface In daily development, object conversion is frequently used, which can be roughly divided into shallow copy and deep copy. If subdivided, deep copy can be subdivided into several types. This paper makes a series of tests based on several mainstream deep copy methods, and explores the principles and scenarios. Readers are welcome to d ...

2.1 introduction The following uses specific examples to introduce the idea of IOC. Firstly, the project follows the MVC development concept, mainly including dao layer, service layer and Test at the same level as main. 2.2 examples 2.2.1 code UserDao interface: package com.yun.dao; public interface UserDao { public void speak(); } ...

Scope and life cycle of Bean in Spring Scope singleton The default scope in Spring is singleton, that is, singleton mode. The bean tag attribute in the xml configuration file can omit the configuration of scope="singleton". For the same implementation class, no matter how many times the getBean() method is called, only one be ...

1, Start to understand the general of the project   1. Project background As the name suggests, online education is a teaching method based on the network. Through the network, students and teachers can carry out teaching activities even if they are thousands of miles apart; In addition, with the help of network courseware, students can st ...

Global routing provides a failure retry mechanism for all routing services. Global routing, that is, default filters # Open route: spring.cloud.gateway.default-filters[0].name=Retry #According to the default parameters, only the GET request is retried, and the parameters are modified to support POST spring.cloud.gateway.default-filters[0].arg ...

Spring factory method IOC is a typical factory pattern. Now let's learn how to use the factory pattern to create bean s. Note: before learning this part, please review or supplement the background knowledge of factory mode in design mode by yourself. You should know that when creating an object, using factory mode is not unnecessary, but a ...

1. Create a new MAVEN project and import the required dependent and static resource files <dependencies> <!--junit rely on--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> </dependency&g ...

Preface JPA was introduced to simplify the development of persistence layers and integrate ORM technology, ending the situation where ORM frameworks such as Hibernate, TopLink, JDO and so on operate independently.JPA is developed on the basis of the existing ORM framework and is easy to use and highly scalable.Overall, JPA includes the fol ...

catalogue One dependency injection 1 what is dependency injection 2 @Bean injection 2.1 test the function of @ Bean component injection: 2.2 during spring IOC component injection, the component is automatically matched by type and Bean Id 3 @Autowired auto assembly (wiring) four     set method injection (Bean attribute injectio ...

@Controller public class UserController { @RequestMapping(value = "/users",method = RequestMethod.POST) public String insertUsers(@RequestBody List<User> users){ System.out.println("insertUsers"); System.out.println(users); return "/success.jsp"; } } 3.2.4 summary 🔥 If there are curly braces outsid ...