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Firstly, the mybatis framework encapsulates sql statements and executes them through tag and attribute parsing in the form of xml. We know that the sql statements inserted into the table are: INSERT INTO table name (column 1, column 2,...) VALUES (value 1, value 2,...) During the insertion process, the database will add transactions by d ...

All supporting materials have been uploaded to QQ group: 167356412; if necessary, the group file can be obtained by yourself Spring Cloud China community official website: http://springcloud.cn Spring Cloud China Community Forum: http://bbs.springcloud.cn Spring Cloud China community documentation: http://docs.springcloud.cn 1, Introduc ...

There are many ways to implement websocket with springboot, and the simplest one is to implement it with @ ServerEndpoint annotation. First, we need to introduce the dependency of websocket: pom. XML (the most important dependency) <!--ws--> <dependency> <groupId>org.springframework.boot</groupId> <artifactI ...

1. Package structure of SpringBoot 2. Relationship between packages Controller: it is mainly responsible for the process control of specific business modules and will call the interface of Service layer to control business logic DAO: no matter what the framework is, we often interact with the database. If we all have to write SQL statements ...

backgroundRecently, during the operation of several projects, customers have proposed whether the file upload size limit can be set larger. Users often need to upload several G data files, such as drawings and videos, and need to optimize the process of uploading large files, display the progress bar in real time, and expand and upgrade the fra ...

1. Switch Exchanges 1.1,Exchanges What are Exchanges? The core idea of RabbitMQ messaging model is that messages produced by producers are never sent directly to queues. In fact, usually producers don't even know which queues these messages are delivered to. On the contrary, the producer can only send messages to the exchange. The work of ...

reference resources: MyBatis-Plus 1, Quick start 1.0 preparation reference resources MyBatis-Plus Create table statement in! 1.1 add dependency & profile During springboot consolidation: <!-- springboot Unit test dependencies for --> <dependency> <groupId>org.springframework.boot</groupId> ...

This example mainly adds enterprise information into the block chain, and then implements the query of the source of enterprise information. It has functions such as adding, querying, modifying, deleting, viewing history and so on. 1. Prepare a bsn-springboot project pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="htt ...

yaml grammar learning configuration file SpringBoot uses a global configuration file with a fixed name application.properties Syntax structure: key=value application.yml Syntax structure: key: space value Function of configuration file: modify the default value of SpringBoot automatic configuration, because SpringBoot is automatic ...

Be a positive person, not a positive person. Source: www.cnblogs.com com/jing99/p/11504113. html First, let's look at the main} configuration class of SpringBoot: @SpringBootApplication public class StartEurekaApplication { public static void main(String[] args) { SpringApplication.run(StartEurekaApplication.class, args); ...