1. SpringBoot integrates MQTT Create a project and introduce MQTT dependencies: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.3.12.RELEASE</version> </dependency> <!-- spring-integration-mqttrely --> <dependency> <gr

Table of contents 1.SSM introduction 1.1 What is SSM? 1.2 SSM framework 1.2.1 Spring 1.2.2 SpringMVC 1.2.3 MyBatis 2.SSM framework integration 2.1 Create database and table 2.2 Create project 2.3 pom.xml 2.4 log4j.properties 2.5 db.properties 2.6 applicationContext-dao.xml 2.7.applicationContext-tx.xml 2.8 applicationContext-service.xml 2.9 springm

When developing Spring in conjunction with Mybatis, implementing fuzzy queries is a common requirement. In Mybatis, LIKE queries can be implemented in a variety of ways, depending on how your query parameters are passed to Mybatis's SQL mapper. Here are a few common ways to implement fuzzy queries: 1. Use #{} directly in the Mapper [&hellip

1. Classification of request mapping methods Based on the annotation style Spring MVC, the URL path of the request mapping is specified through the @RequestMapping annotation. Commonly used methods of URL path mapping include request-based URL path mapping, Ant-style URL path mapping, and REST-style URL path mapping. Next, these three request mappi

1. Path parameter reception Path passing parameters is a way of passing parameters in the URL path. In RESTful web applications, path passing parameters are often used to represent unique identifiers of resources or more complex representations. The Spring MVC framework provides the @PathVariable annotation to handle path passing parameters. Th