Programmer Think

Because the programming idea is different from the design mode of database, some ORM frameworks have been born. The core is to turn relational database and data into object-oriented. Hibernate and myBatis are currently popular solutions. Both have their own advantages and disadvantages. The competition is fierce, and one of the more important c ...

JDBC When it comes to java operating database, JDBC must be inexcusable. Mybatis actually encapsulates JDBC // Register JDBC Driver Class.forName("com.mysql.cj.jdbc.Driver"); // open a connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/spring-shiwu? characterEncoding=utf-8&serverTimezone=UTC", "root", "1234 ...

preface In the traditional SSM project, mybatis is the database connection framework commonly used in our development program, and we often ask about the implementation principle of mybayis in the interview. Therefore, we need to fully understand its underlying principle, and now we can preliminarily understand mysql through a custom frame ...

Mybatis-Plus 1 Introduction to mybatis plus Official website address Mybatis plus (mp for short) is an enhancement tool of mybatis. Based on mybatis, it is only enhanced without change. It is developed for simplification and efficiency. characteristic: No invasion: it is only enhanced without change, and its introduction will not affect ...

Recently, I went out for an interview and wrote some technical points about Mybatis in my resume, so the interviewer began to ask me constantly. This article specially records some problems encountered in the interview. What is Mybatis Mybatis is a persistent SQL framework that encapsulates SQL to a certain extent. It encapsulates the commonl ...

Spring integrates MyBatis configuration 1.pom.xml dependency Add the dependent package of mybatis <!-- mybatis Frame package start --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <dependency> ...

preface After consulting the official documents of mybatis plus, I found that there were only a few words and no examples for multi table joint query. I had to figure out how to use mybatis plus for multi table joint query. The way of using xml is too redundant, so after checking the use of annotations, we decisively choose to use annotations. ...

Mybatis Plus quick get start maven configuration <?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="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0. ...

1.Mybatis Environmental Science: JDK 1.8Mysql 5.7maven 3.6.1IDEA 2. Introduction 2.1 what is MyBatis MyBatis is an excellent persistence layer frameworkMyBatis avoids almost all JDBC code and the process of manually setting parameters and obtaining result setsMyBatis can use simple XML or annotations to configure and map native information ...

Article catalogue 1, Query requirements (1) Associated query for three tables Class scheduleTeacher tableStudent list A class is equipped with one teacher, and a class has multiple students (2) Query class information by class number The inquired class is required to bring teacher information and student information of the class (3) ...