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Spring Boot JPA preface The full name of JPA is Java Persistence API, that is, Java Persistence API. It is a set of ORM based specifications launched by SUN company. It is internally composed of a series of interfaces and abstract classes. JPA describes the mapping relationship between object and relational table through JDK 5.0 annotation, a ...

Reference article: https://blog.csdn.net/qq_36371449/article/details/80314024 *** 1, Introduction to ServletContext 1. Concept ServletContext is also called Servlet context. When the WEB container starts, it will create a corresponding ServletContext object for each WEB application, which represents the current WEB application. This o ...

EMQX security certification The connection authentication and access control of EMQ X message server are provided by a series of authentication plugins, and their names comply with emqx_auth_ In EMQ X, these two functions refer to: Connection authentication: EMQ X checks whether the client on each connection has the permission to access t ...

Bean life cycle preface For ordinary Java objects, the object is created when it is new, and is recycled by the garbage collection mechanism when it has no reference. For objects managed by the Spring IoC container, their life cycle is completely controlled by the container. The life cycle of each Bean in Spring is as follows: 1, ...

Spring Boot -- Integrated Shiro framework 1. Introduction to Shiro 1.1. What is Shiro Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, password and session management, Web integration, caching, etc. At present, more and more people use Apache Shiro because it is quite simple. ...

SpringBoot learning notes Part08 1. WebMvcAutoConfiguration SpringBoot starts and loads the xxxAutoConfiguration class (autoconfiguration class) by default. Webmvcoautoconfiguration is the autoconfiguration class of spring MVC function. According to our previous study, open the spring automatic configuration class package in libs, Find webm ...

Attribute assignment summary In Spring, we can use @ Value to assign values to our properties. Using @ Value assignment, you can: Basic parameters Spel expressions can be written: #{} You can use ${} to extract the value in the configuration file (. properties) (that is, the value in the running environment) test 1. Write the configuratio ...

1. Introduction to spring MVC 1.1 MVC mode MVC is a software architecture mode in software engineering. It is a development idea that separates business logic and display interface. M (model) model: process business logic and encapsulate entitiesV (view): display contentC (controller): responsible for scheduling and distribution (1. Receivin ...

1. ForewordIn your eyes, do you think the goddess is like an iceberg beauty? In the chat, it is very cold to you, or cold and hot, indifferent. Many boys are helpless in the face of this problem, or when the goddess ignores you, they are in a hurry to send a short message, and the goddess ignores you at all. Then what shall I do?In fact, the go ...

You know how to go to the town building map first 1, Introduction 2 1.1 research background 2 1.2 research purpose and Significance 2 1.3 research contents 3 1.4 feasibility study design 3 1.5 social feasibility 4 1.6 relevant technical description 4 spring 4 Spring 5 jQuery 5 Mysql 6 1) Powerful 6 2) Support cross platform 6 3) ...