使用MyBatis Plus

IDEA配置

IDEA安装MyBatisX插件。
根据IDEA指引来创建Spring Boot项目mybatisplus-demo1。

添加依赖

添加mybatisplus和lombok依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.1.0</version>
</dependency>
 
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.20</version>
</dependency>
 
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

添加文件

application.yml

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: root
    password: root
    url: jdbc:mysql://xx.xx.xx.xx:3306/test?useUnicode=true&characterEncoding=utf8
# 输出sql信息
mybatis-plus:
  configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

问题1：userMapper飘红

搜索Autowiring for Bean Class

问题2：Cannot load driver class: com.mysql.cj.jdbc.Driver

添加mysql依赖后reimport

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

问题3：No qualifying bean of type 'com.wjq.mapper.UserMapper' available

@SpringBootApplication上面添加@MapperScan("com.wjq.mapper")。