Programmer Think

catalogue 1. Basic concepts 1.1 spring MVC core: dispatcher servlet (central scheduler) 2. Create the first spring MVC project 2.1 create a web maven template 2.2 editing web XML file, configuring the central scheduler Version 2.2.1 is too low, replace with a higher version 2.2.2 declare and register the DispatcherServlet, the core objec ...

background During business, it is necessary to ensure that a user can only insert one piece of data into the wallet table. When the service adds the synchronize lock and searches before insertion, one day it suddenly finds that multiple pieces of data appear in a short time. Through the log, it is found that there are multiple identical reques ...

In SpringBoot, classes with certain conditions will be automatically assembled into a Bean in the container. Here, you need to know about configuration classes: the classes wrapped by the following three annotations are configuration classes: @SpringBootApplication@SpringBootConfiguration@Configuration Personally, the Configuration class ...

3, spring integrates MyBatis Official download address Power node spring data Video viewing address https://www.bilibili.com/video/BV1nz4y1d7uy Integrating MyBatis with Spring mainly solves the problem of handing over SqlSessionFactory objects to Spring for management You only need to register the SqlSessionFactoryBean, the object gener ...

Problem introduction (key points) 1 what is the target object? 2 how to find the method that the target object needs to be enhanced (modified)? 3 how to handle the methods to be enhanced (modified)? Spring AOP related concepts The bottom layer of Spring's AOP implementation is to encapsulate the code of the dynamic agent. After encapsu ...

What is MyBatis? MyBatis is an excellent persistence layer framework, which supports customized SQL, stored procedures and advanced mapping. MyBatis avoids almost all JDBC code and manually setting parameters and getting result sets. MyBatis can use simple XML or annotations to configure and map native information, and map interfaces and Java ...

SpringSecurity 1, Overview Official website: https://spring.io/projects/spring-security SpringSecurity official websiteSpring security is a security framework based on authentication and authorization developed by spring companyAuthentication: login processAuthorization: grant corresponding operation permissions during login General permi ...

8. Ribbon load balancing service call 8.1 general 1. What is ribbon Spring Cloud Ribbon is a set of client-side load balancing tools based on Netfix Ribbon. Ribbon is an open source project released by Netfix. Its main function is to provide software load balancing algorithms and service calls on the client. The ribbon client componen ...

Although I have written Java code for some time, I still can't figure it out and give up selectively as long as I see generics. However, I found that generics are used in many places when looking at the code of the company leaders today, so I'll sort out the generics I understand today. What is generics generic programming is a style or pa ...

At the beginning of the article, let's ask a question. If OOM occurs in one thread of a java program, can other threads in the process still run? Next, do an experiment to see if the six kinds of JVM programs can be accessed after OOM. Here I use a springboot program. /** * @author : charon * @date : Created in 2021/5/17 8:30 * @descripti ...