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preface The core of the Spring framework is the concept of Bean. Here we will talk about three methods to create Bean instances. At present, there are three methods to create beans. (1) Configuring beans through XML (2) Declare beans through annotations (3) Configuring beans through JavaConfig XML configuration Bean Disadvantages: (1) XML ...

Annotation provides a secure annotation like mechanism to associate any information or metadata with program elements (classes, methods, member variables, etc.). Some predefined annotations in JDK @Override: check whether the method marked by the annotation inherits from the parent class (Interface) @Deprecated: the method marked by the ...

Spring Boot must know 1, What is it? What can you do? Is a rapid development of scaffolding Role: quickly create independent, production level Spring based applications SpringBoot is a framework based on Spring to improve efficiency. It can make coding simpler, configuration management simpler and deployment more convenient. characteristic ...

Learning website: station b mania proxy pattern Why learn proxy mode? Because this is the bottom level of Spring AOP! [Spring AOP and Spring MVC are important] Classification of agent modes: Static ProxyDynamic Proxy Static Proxy Role Analysis: Abstract Role: An interface or abstract class is typically used to solve the problem ...

AOP concept What is AOP? Aspect oriented programming, AOP can isolate all parts of business logic, so as to reduce the coupling between all parts of business logic, improve the reusability of programs, and improve the development efficiency. Generally speaking, it is to enhance the main functions without modifying the source code AOP underly ...

1, Introduction to PlumeLog       The intrusion free distributed log system collects logs based on log4j, log4j2 and logback, and sets the link ID to facilitate the query of associated logsBased on elastic search as query engineHigh throughput and query efficiencyThe whole process does not occupy the local disk space of the appl ...

1. Two methods of creating Maven project 1.1 the first is to use spring initializr. This configuration is the simplest, but the operation process is a little cumbersome when building a project. If there is no image, default is selected by default; Click next, Group package organization, artifact project name, 1.2 factors of packaging: jar an ...

Spring MVC type Converter In the spring MVC framework, you need to collect user request parameters and pass them to the application controller component. All request parameters can only be string data types. The spring MVC framework must Convert these strings into corresponding data types. Generally, JSP+Servlet requires the developer to perfo ...

background                   When using spring to develop applications, you need to connect to the database. Generally, the database information is placed in a property configuration file, such as jdbc.properties, which stores the sensitive information of the database in clear te ...

In normal development, you will encounter the need to add transactions. The annotation @ Transactional is often used, but sometimes it is found that it is added explicitly, but it does not take effect. Why? Today, let's talk about several transaction failure scenarios that we usually encounter to avoid stepping on the pit in the future. Clic ...