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I. objectives Spring boot integrates the addition, deletion, modification and query operations of Mybatis on a single table 2, Development tools and project environment IDE: IntelliJ IDEA 2019.3 SQL: Navicat for MySQL 3, Basic environment configuration Create database: demodb Create data table and insert data DROP TABLE IF EXISTS t_empl ...

Spring boot integrates mybatis plus (2) multi data source Druid monitoring, Atomikos deals with transactions, cross database and linked table query In the previous chapter, I used springboot project to integrate mp, mp basic use, code generator use, Druid data monitoring, etc., but only for single dat ...

This article mainly introduces mybatis and its simple use, which is very simple. The relevant content is not in-depth, nor in-depth study of its principle. The focus is on how to use it. There may be some small problems in some places. Please forgive me a lot. Thank you~ 1, About Mybatis MyBatis is a ...

1. introduction Spring Boot is a framework to simplify spring development. It is used to monitor the spring application development. The Convention is larger than the configuration. just run can create an independent, product level application. When we use Spring boot, we only need to configure the corresponding Spring boot to use all the Sprin ...

It's all notes of personal learning process, not summary, no reference value, but this book is great Basic grammar Definition annotation Annotations usually contain elements that represent specific values. These values can be used by programs or tools when analyzing and processing annotations. Th ...

Catalog CRUD Operation of MyBatis 2. MyBatis Expansion 1. Alias Configuration Processing 1.2, Custom Alias 1.3. Aliases that come with the system 2. Attribute Configuration Processing 3. Query Result Mapping 3.1. How to alias fields 3.2, resultMap element 4. Mapper Components 4.1, Mapper ...

1. Add, delete, modify and check. 1, For the add operation, if the id is generated automatically, the primary key needs to be returned. Note that if the primary key is of Long type, the int type should also be returned, because mybatis does not support Long.   mybatis ResultMap application My ...

1. Preparation To see the whole initialization process of MyBatis, first create a simple Java project. The directory structure is shown in the following figure:   1.1 Product entity class   public class Product { private long id; private String productName; private String productCo ...

Level 1 Cache Mybatis supports caching, but by default without configuration, it only turns on the first level cache, which is relative to the same SqlSession.So when we invoke a Mapper method using the same SqlSession object with exactly the same parameters and SQL, we usually execute SQL only once ...

I have combed the workflow and key source code of MyBatis when it is used alone. Now let's see how MyBatis works when it is integrated with Spring Start with use Spring integrates MyBatis 1. Introduce dependency. In addition to the dependency of MyBatis, you need to introduce the dependency of MyB ...