Programmer Think

This time, let's go straight to the point. First step Using this module, you need to add package dependency: The second step You need to tell me your pointcut (inherit LBaseWebLogAspect, implement pointCut() method, and configure your pointcut) @Aspect @Component class WebLogAspect extends LBaseWebLogAspect { @Pointcut("execution(* com.fe ...

1, Spring Data JPA 1, introduction (1) Official website address:　　https://spring.io/projects/spring-data-jpaReference documents:　　https://docs.spring.io/spring-data/jpa/docs/2.2.3.RELEASE/reference/html/#preface (2) Basic introduction:Spring Data JPA is a set of JPA framework based on ORM framework and JPA specification encapsulation of spr ...

1. Preface Sometimes we need to declare some custom servlet filters in the Spring Boot Servlet Web application to handle some logic. For example, simple permission system, request header filtering, XSS attack prevention, etc. This article explains how to declare custom servlet filters in Spring Boot applications and define their respective sco ...

I. demand The existing requirement is to show all comments of a post. Two: analysis Comments on posts are divided into main comments and sub comments. Main comments are direct comments on posts, and sub comments are comments on comments. Three: train of thought First, get all the main comments of a post, recursively judge whether there are ...

background Multithreading updates the value of variables, which may not get the expected value. Of course, adding the synchronized keyword can solve the problem of thread concurrency. Another solution is provided here, that is, the atomic operation class under the java.util.concurrent.atomic package, which provides a simple, efficient and thre ...

Special Car Introduction This is a special bus going to the Spring Boot Transaction Ideas. In the last article, we detailed the principles of Spring Boot Transaction implementation in the Spring Boot Transaction Source Analysis Train [1], which is based on the previous one. Before the battle, let's review the main points of the last article: ...

1, introduction In business development, it is likely to be the case of retrying. Retry is mainly used when the call fails, especially when dubbo related exception and network related exception occur. The following is a simple encapsulation of this function, and then gives some relatively more open source code addresses.   ...

Preface At present, it is quite popular to build a microservice using Springboot in Java. When building a microservice, most of us choose to expose a REST API for invocation.Or the company uses a separate front-end and back-end development model where front-end and back-end work is developed by completely different engineers.Maintaining a compl ...

Traffic statistics of MapReduce means of preparation Open hadoop pojo level mapper level reducer level partition layer job level Package it into jar package and upload it to the server summary Sort by total flow pojo level mapper level reducer level Zoning layer job level means of preparation A virtual machine with ha ...

  First, explain 1. Definition of notes The Java file is called Annotation, which is represented by @ interface. 2. yuan annotation There are some notes on @ interface as needed, including @ Retention, @ Target, @ Document, @ Inherited. 3. Retention policy of notes @ Retention(RetentionPolicy.SOURCE) / / the annotation only ...