Programmer Think

1. Introduction to mybatis plus Mybatis plus is an enhanced version of mybatis. Based on mybatis, only enhancements are made without changes. It is born to simplify development and improve efficiency. 2. What is mybatis plus, MP No invasion: it is only enhanced without change, and its introduction will not affect the existing project, which ...

1, MyBatisGenerator installation When using mybatis, we need to repeatedly create pojo classes, mapper files and dao classes, and configure the dependencies between them. It is troublesome and has done a lot of repeated work. Mybatis officials have also found this problem, so we have provided mybatis generator tool to help us automatically cre ...

What is MyBatis? MyBatis is an excellent persistence layer framework, which supports customized SQL, stored procedures and advanced mapping. MyBatis avoids almost all JDBC code and manually setting parameters and getting result sets. MyBatis can use simple XML or annotations to configure and map native information, and map interfaces and Java ...

spring boot project integrates mybatis plus to adapt multiple data sources + reflection to obtain annotation data Many times, our projects may not use a database or a type of database. According to the business, we can be divided into the following types: single database, single data source, multi database, single data source, multi database, ...

1 Introduction to mybatis 1.1 what is MyBatis MyBatis is an excellent persistence layer framework, semi-automatic ORM It supports custom SQL, stored procedures and advanced mapping. MyBatis eliminates almost all JDBC code, setting parameters and obtaining result sets. MyBatis can configure and map primitive types, interfaces and Java POJO s ...

1. First create the SqlSessionFactory factory class through SqlSessionFactory builder, and then create the SqlSession object through the SqlSessionFactory factory class. Each mybatis config XML corresponds to a SqlSessionFactory object, that is, if there are multiple sets of environments, each environment creates a SqlSessionFactoryOnce SqlS ...

Environment: JDK13, IDEA, springboot2 5.3,maven3. eight point one catalogue 1, Automatic configuration of data sources 1. Import jdbc scene Analysis auto configuration 2. Using Druid data sources Configure the Druid data source in custom mode Configure Druid data source monitoring page function Configure the Druid data source in the ...

Game Item Management System @email: lovefyj616@foxmail.com This management system can store the same kind of items, support the operation of selling, using, removing, purchasing, etc. In addition, it introduces the attributes of personal life value, manpower value, gold coin, attacking power to show the excellent data binding operation ...

CRUD insert insert should mainly focus on the processing of primary key fields by mybatis plus Primary key generation strategy Extension: common strategies for generating primary keys UUIDSelf increment IDSnowflake algorithmGenerated using redis Snowflake algorithm: The id generated by SnowFlake algorithm is a 64bit integer, which ...

Detailed analysis of Mybatis cache 1, Cache cache The purpose of caching is to improve the efficiency of query and reduce the pressure on the database. MyBatis provides level 1 cache and level 2 cache, and reserves an interface for integrating third-party cache. All classes related to cache in MyBatis are in the cache package. There is a ...