Programmer Group

Handling exceptions in Java is not an easy task. It is not only difficult for beginners to understand, even some experienced developers also need to spend a lot of time thinking about how to handle exceptions, including which exceptions need to be handled, how to handle and so on. This is also the reason why most development teams will make som ...

brief introduction At present, most RESTful systems use JWT for authorization verification. In Spring Boot, Shiro and JWT can be used for simple permission and authentication verification. In the process of integration with Spring Boot, there are many holes. Combined with their own and common application scenarios, we developed the simplest in ...

1. Prepare the data first. The data here is not the data directly found in the database, but a copy of the data found. The data of the two does not affect each other, so that the copied data can be modified. (1) define a method (implementation class method of service layer) of data found from database, omit the method of mapper mapping file and ...

1, Spring's transaction mechanism All data access technologies have transaction processing mechanisms, which provide API s to enable transactions, commit transactions to complete data operations, or roll back data in case of errors. Spring's transaction mechanism is to use a unified mechanism to handle transactions of different data a ...

Why do we need to specify meaningful thread names when creating threads or thread pools? The ultimate goal is to facilitate backtracking. In our daily development, a project will create many thread pools for resource isolation, but if we do not have a good name, it will be difficult to locate when there is a problem. public class Demo5 { ​ ...

Do you know how Spring resolves configuration classes? Catalog Second line of code in SpringClassPathBeanDefinitionScanner Source Analysis1. Complete the scan by findCandidateComponents method2. Execute the postProcessBeanDefinition method3. Execute the processCommonDefinitionAnnotations method4. Register BeanDefinitionHow does Spring resolve ...

1. Preface In the previous video monitoring system, according to the needs of different users, many kinds of video monitoring cores have been made, including ffmpeg cores, vlc cores, mpv cores, and Haikang sdk cores. In order to make a common function, different cores are very convenient to switch, such as pro changing the variable name of DEFI ...

My hobby is to make plans, overturn plans, make plans again, and let others supervise my study, supervise my weight loss, and supervise me to change my bad habits. So I'm going to make a little program for myself. The layout of the applet interface is almost finished. Now let's register and log in your application. 1, Applet side: 1,.wxml <v ...

Learn how to improve the reliability of RabbitMQ message consumption in human resource management system, and avoid repeated consumption of messages. 1 General stay How to improve the reliability of RabbitMQ message sending in human resource management system In this paper, we ensure the reliability of message sending. However, under such a mec ...

Chapter 14 of SpringCloud Alibaba, upgrade, distributed transaction solution, Seata 1, Overview of distributed transactions 1. What is distributed transaction With the rapid development of the Internet, the software system has changed from the original single application to the distributed application. The distributed system will split an appli ...