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1, What is a hook function In Spring, if the JVM terminates abnormally, how does Spring ensure that the occupied resources, such as database connections, will be released? The hook function is so simple that you can just extract a piece of Spring code. 2, Question When does the Bean in the Spring container execute the destruction method? We ...

The Spring container is a super factory, and the Bean in the Spring container is the product of the factory. For developers, the Spring framework mainly does two things: (1) Develop Bean (2) Configure Bean 1. Definition and alias of Bean A bean is an object that is instantiated, assembled, and managed through the Spring IoC container. It is ...

Use Java to read The contents of the properties file are and encapsulated into JavaBean s New Maven project: demo1.Modify POM XML, add dependencies. <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" ...

Summary: Containers are no longer created every time, that is, spring configuration files or configuration classes no longer need to be loaded multiple times It is designed to create app objects as soon as the web application startsThe configuration name can be ignored, that is, the configuration name is different, and you only need to modify ...

[Spring Boot] 032 - configure AOP 1, AOP 1. Overview In the following reference articles, AOP has been introduced in detail, but I am very unfamiliar because I don't often use (never used) AOP, so I take this opportunity to learn about AOP again, 2. Reference articles [Spring]009-AOP https://blog.csdn.net/qq_29689343/article/details/10841 ...

1. What is Spring? Spring is an open source framework. Spring is a lightweight Java development framework rising in 2003. It is derived from some concepts and prototypes described by Rod Johnson in his book expert one on one J2EE development and design. It is created to solve the complexity of enterprise application development. One of the ma ...

Common annotations in Spring are as follows: 1)@Component This annotation can be used to describe beans in Spring, but it is a generalized concept, which only represents a component (Bean) and can act at any level. When using, you only need to mark the annotation on the corresponding class. 2)@Repository The class used to identify the data acce ...

catalogue About redisinstallSimple configuration and use of sentrySimple cluster configuration and use 1. About Redis What is Redis -redis is a key value storage system (NoSQL). -redis provides five data types: `string,hash,list,set and zset(sorted set) `. Advantages of Redis (compared with traditional relational databases)High performan ...

1, Echo function Before the actual modification, you need to have an echo function, that is, you can see the data after clicking the edit page. 1. Modify operation hyperlink The request address here is the same as the deleted address. You need to bring the id because you want to echo the data of this id. <td> <a @click="del ...

Video source: Power Node springboot Video Tutorial Why use Spring Boot? Using Spring and Spring MVC requires a large number of xml configuration files, configuring various objects, and putting the objects in the Spring container to use them is cumbersome. At the same time, when integrating other frameworks with Spring, you need to understand ...