一、MyBatisPlus简介
1. 入门案例
问题导入
MyBatisPlus环境搭建的步骤?
1.1 SpringBoot整合MyBatisPlus入门程序
①:创建新模块,选择Spring初始化,并配置模块相关基础信息
②:选择当前模块需要使用的技术集(仅保留JDBC)
③:手动添加MyBatisPlus起步依赖
- <dependency>
- <groupId>com.baomidou</groupId>
- <artifactId>mybatis-plus-boot-starter</artifactId>
- <version>3.4.1</version>
- </dependency>
- <dependency>
- <groupId>com.alibaba</groupId>
- <artifactId>druid</artifactId>
- <version>1.1.16</version>
- </dependency>
复制代码 注意事项1:由于mp并未被收录到idea的系统内置配置,无法直接选择加入
注意事项2:如果使用Druid数据源,需要导入对应坐标
④:制作实体类与表结构
(类名与表名对应,属性名与字段名对应)- create database if not exists mybatisplus_db character set utf8;
- use mybatisplus_db;
- CREATE TABLE user (
- id bigint(20) primary key auto_increment,
- name varchar(32) not null,
- password varchar(32) not null,
- age int(3) not null ,
- tel varchar(32) not null
- );
- insert into user values(null,'tom','123456',12,'12345678910');
- insert into user values(null,'jack','123456',8,'12345678910');
- insert into user values(null,'jerry','123456',15,'12345678910');
- insert into user values(null,'tom','123456',9,'12345678910');
- insert into user values(null,'snake','123456',28,'12345678910');
- insert into user values(null,'张益达','123456',22,'12345678910');
- insert into user values(null,'张大炮','123456',16,'12345678910');
复制代码- public class User {
- private Long id;
- private String name;
- private String password;
- private Integer age;
- private String tel;
- //自行添加getter、setter、toString()等方法
- }
复制代码 ⑤:设置Jdbc参数(application.yml)
- spring:
- datasource:
- type: com.alibaba.druid.pool.DruidDataSource
- driver-class-name: com.mysql.cj.jdbc.Driver
- url: jdbc:mysql://localhost:3306/mybatisplus_db?serverTimezone=UTC
- username: root
- password: root
复制代码 ⑥:定义数据接口,继承BaseMapper
- package com.itheima.dao;
- import com.baomidou.mybatisplus.core.mapper.BaseMapper;
- import com.itheima.domain.User;
- import org.apache.ibatis.annotations.Mapper;
- @Mapper
- public interface UserDao extends BaseMapper<User> {
- }
复制代码 ⑦:测试类中注入dao接口,测试功能
- package com.itheima;
- import com.itheima.dao.UserDao;
- import com.itheima.domain.User;
- import org.junit.jupiter.api.Test;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.boot.test.context.SpringBootTest;
- import java.util.List;
- @SpringBootTest
- public class Mybatisplus01QuickstartApplicationTests {
- @Autowired
- private UserDao userDao;
- @Test
- void testGetAll() {
- List<User> userList = userDao.selectList(null);
- System.out.println(userList);
- }
- }
复制代码 2. MyBatisPlus概述
问题导入
通过入门案例制作,MyBatisPlus的优点有哪些?
2.1 MyBatis介绍
<ul>MyBatisPlus(简称MP)是基于MyBatis框架基础上开发的增强型工具,旨在简化开发、提高效率
官网:https<a href="https://mybatis.plus/" target="_blank" rel="noopener">
来源:https://www.cnblogs.com/lcha-coding/p/16366441.html
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