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catalogue 1. Concept of mybatis (what is mybatis) 2. Why use MyBatis Steps for using mybatis   Specific configuration   Extension: multi table associated query Many to one: One to many:   nested queries Dynamic SQL: 1. Concept of mybatis (what is mybatis)          MyBatis ...

Foreword: The code in this article is based on JDK1.8 ​ Thread Insecure List java.util.LinkedListjava.util.ArrayList ​ Thread-safe List java.util.VectorJava.util.Stack (a subclass of Vector that encapsulates Vectors and can only do a FIFO stack operation)Java.util.Collections.SynchronizedList (a static internal class in Collections)java ...

catalogue 1, System introduction 1. Development environment 2. Technical selection 3. System functions 4. Access to resources 2, System display   1. Log in to the system 2. Query pet information 3. Add pet information 4. Update pet information 5. Delete pet information 3, Partial code BusinessService LoginService   4, O ...

preface: Hello, guys, I'm running snail rz. Of course, you can call me snail Jun. I'm a rookie who has studied Java for more than half a year. At the same time, I also have a great dream, that is, to become an excellent Java Architect one day. This Mybatis basic learning series is used to record the whole process of learning the basic ...

Preface: Hello, ladies and gentlemen, I'm running like a snail rz. Of course you can call me Snail Jun. I'm a beginner who has studied Java for more than half a year. At the same time, I have a great dream that I will become an excellent Java architect one day. This SpringBoot Basic Learning Series is used to record the entire process of le ...

Data types and operators Variables and types Variable refers to the variable amount when the program runs, which is equivalent to opening up a memory space to save some data, and the value of the variable can be known only when the program runs. Type is a division of variable types. Variables of different types have different characterist ...

  1, Introduction to spring MVC          Spring MVC is a part of the Spring Framework and a lightweight Web framework based on Java to implement MVC.          MVC is a programming idea (it is divided into three layers, Model View Controller, and each laye ...

brief introduction What is Mybatis? MyBatis is an excellent persistence layer frameworkIt supports custom SQL, stored procedures, and advanced mapping.MyBatis eliminates almost all JDBC code and the work of setting parameters and obtaining result sets.MyBatis can configure and map primitive types, interfaces and Java POJO s (Plain Old Java ...

Learning Content: Learning Java Web (Day47) 1,Maven 2. Create maven projects through IDEA 1,Maven (1) Project automation and project management software provided by the Apache Software Foundation. Based on the concept of Project Object Model (POM), Maven uses a central piece of information to manage the steps of building, reporting, and do ...

The status of spring is self-evident. Many big guys have studied it. I believe you have been asked to talk about IOC, AOP, spring startup process, Bean initialization process, circular dependency and other issues more than once in the interview. Just looking at the eight part essay written by others, I haven't seen the source code. I don't know ...