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Auto configuration 1.1 automatically configure Tomcat Introduce tomcat dependency <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <version>2.3.12.RELEASE</version> <scope>compile</scope> </dependen ...

@ Lookup annotation of Spring dependency injection When understanding the Spring constructor inference, I saw the following source code: problem analysis Generally, we will use the @ Autowired annotation to realize the automatic injection of dependencies: Attribute injection @Component public class Xxx{ @Autowired private Aa ...

1, HttpServletRequest @RequestMapping("/...") public ModelAndView doSome(HttpservletRequest request,HttpServletResponse response,HttpSession session) { String name = request.getParameter("name");//Received parameters } 2, HttpServletResponse 3, HttpSession 4, User submitted data Receive parameters submitted by users: 1. Receive one by on ...

JdbcTemplate Jdbctemplate (concept and preparation) 1. What is a JdbcTemplate? The Spring framework encapsulates JDBC and uses JdbcTemplate to facilitate database operation. 2. Preparation (1) Import related jar packages (2) Configure the database connection pool in the Spring configuration file <!-- Database connection pool --&g ...

Spring MVC overview 1. Spring MVC overview 1) The excellent Web framework based on MVC design concept provided by Spring for the presentation layer is one of the most mainstream MVC frameworks at present 2)Spring3. After 0, it comprehensively surpassed struts 2 and became the best MVC framework. 3) Spring MVC uses a set of MVC annotations ...

Login requirements 1. Login takes the form of pop-up layer 2. Login method: (1) Mobile phone number + mobile phone verification code (2) Wechat scanning 3. There is no registration interface. The first login determines whether the system exists according to the mobile phone number. If it does not exist, it will be registered automatically ...

What scenarios do you use Spring's @ Transactional annotation to control transactions that do not take effect? I don't know if my friends have such an experience. When they are happy to write business code, suddenly the transaction in a method seems to fail. Then, when debug ging tracks the code, it is found that after the execution of the fir ...

Spring 1, Spring overview 1.1 coupling degree of Web project In the Servlet, you need to call the method in the service, and you need to create a new service instance in the Servlet class. At the same time, in the service implementation class, you also need to call the methods in DAO, and you also need to new an object of DAO implementation ...

This article is excerpted from Spring 5 core principles 1 custom configuration 1.1 configure application Properties file For the convenience of parsing, we use application Properties instead of application XML file. The specific configuration contents are as follows: scanPackage=com.tom.demo 1.2 configuring web XML file As we all know, all ...

The most important concepts of Spring are IOC and AOP. This article is actually to lead you to analyze the IOC container of Spring. Since we usually use Spring, how can we not have a good understanding of Spring? Reading this article will not make you a Spring expert, but it will help you understand many concepts of Spring and help you troubles ...