Programming VIP

1. Construction of environment Import the corresponding jar package using maven. The dependencies involved are as follows <dependencies> <!--Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version ...

Source download The source code of this chapter is github What is the lifecycle of spring beans For ordinary Java objects, create the object when new, and then the object can be used. Once the object is no longer used, Java automatically garbage collects it. The objects in Spring are beans. Beans are no different from ordinary Java object ...

catalogue Pre knowledge Custom landing page Let's start with custom jsp pages Customize the use vue page Connect to database query user name and password Connect to database and query data to configure My information is relatively backward. I only know one thing today. The following is from the official website. Whether to study or not ...

Getting started with JVM Inclusion relationship of JDK, JRE and JVM JVM features Some people say that classLoader does not belong to the JVM, and the concept does not matterInterpretation and compilation mix Cross language platform The JVM is java independent Any language - compile or dynamically generate - > Class file - run in - &gt ...

First of all, it should be clear that spring handles loop dependencies in three ways:① Constructor's loop dependency: spring cannot handle this dependency, and directly throws a beancurrentylncreationexception.② setter cyclic dependency in singleton mode: handle cyclic dependency through "L3 cache".③ Non singleton circular dependency: ...

preface Recently, I learned spring MVC from shangsilicon Valley at station B. I felt that it was very good and easy to understand, so I partially modified and added the notes provided by the teacher according to my own understanding for future review 1, Introduction to spring MVC Framework = configuration file + jar package 1. What is M ...

Learning content: using annotation development (CRUD) 1. How to use annotations 1.1. Annotation is implemented on the interface 1.2. The interface needs to be bound in the core configuration file 1.3 preparation of test procedures We can use annotations without writing usermapper XML (can be understood as interface implementation class ...

brief introduction Mybatis mate is an mp enterprise level module. It supports sub database and sub table, data audit, data sensitive word filtering (AC algorithm), field encryption, dictionary writeback (data binding), data permissions, automatic generation of table structure, SQL maintenance, etc. It aims to process data more quickly and grac ...

VIII Spring transaction management A transaction can be regarded as a unit * * (whole) * *, which is composed of several operations on the database. When we develop enterprise applications, the most common operation for business members is the combination of multi-step operations for data reading and writing. Exceptions may occur at any st ...

Introduction to fastjason Fastjson framework Download: https://github/alibaba/fastjson Fastjson JNDI Download: https://github.com/earayu/fastjson_jndi_poc fastjson is a high-performance JSON library written in java language developed by Alibaba, which is used to convert data between JSON and Java Object. Instead of using java's serializa ...