SpringBoot整合MybatisPlus

1. 导入坐标

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.1</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>

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

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

2. 实现类及其接口

public class Book {
    private Integer id;
    private String name;
    private double price;
    private String author;
    private int count;
}    

• 定义数据层接口与映射配置，继承BaseMapper

@Mapper
public interface  BookDao extends BaseMapper<Book> {

}

3. application.yml 配置

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/ssm_db
    username: root
    password: root

4. 测试

@SpringBootTest
class Springboot06MybatisPlusApplicationTests {
    @Autowired
    private BookDao bookDao;
    @Test
    void contextLoads() {
        System.out.println(bookDao.selectById(2));
    }


    @Test
    void selectAll() {
        List<Book> bookList = bookDao.selectList(null);
        for (Book book : bookList) {
            System.out.println(book);
        }
    }
}