springboot集成mybatis-plus

springboot项目 先导入相关依赖
mybatis-plus相关依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.0.5</version>
</dependency>
<dependency>
    <groupId>com.h2database</groupId>
    <artifactId>h2</artifactId>
    <scope>runtime</scope>
</dependency>
加快实体类开发使用lombok

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

 2  端口号和数据库配置

1 server:
2   port: 8080
3 
4 spring:
5   datasource:
6     driver-class-name: com.mysql.cj.jdbc.Driver
7     username: root
8     password: "131412"
9     url: jdbc:mysql://localhost:3306/user?serverTimezone=GMT%2B8&useSSL=false&useUnicode=true&characterEncoding=UTF-8

3创建实体类

 4写一个UserMapper接口

 1 package com.example.demo6.mapper;
 2 
 3 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 4 import com.example.demo6.pojo.user;
 5 import org.springframework.stereotype.Repository;
 6 //代表持久层 继承BaseMapper后 就有了基本的曾删改查等功能
 7 @Repository
 8 public interface UserMapper extends BaseMapper<user> {
 9 
10 
11 }

 5主启动类扫描mapper接口

 6测试类测试 查询全部数据

 7配置日志

mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl