<dependency>
 <groupId>org.apache.derby</groupId>
 <artifactId>derby</artifactId>
 <scope>runtime</scope>
</dependency>

spring:
  datasource:
    username: hsp
    password: 123456
    url: jdbc:derby:blogDb;create=true
    driver-class-name: org.apache.derby.jdbc.EmbeddedDriver
    schema: classpath:schema.sql
    data: classpath:data.sql
    initialization-mode: always
    continue-on-error: true

CREATE TABLE blog (
  id INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1, INCREMENT BY 1),
  title varchar(255) DEFAULT NULL,
  PRIMARY KEY (id)
);

insert into blog(id,title) values(1,'花生皮編程博客');

@MapperScan({"cn.hsp.blog"})
@SpringBootApplication
public class HspApplication {

 public static void main(String[] args) {
  SpringApplication.run(HspApplication.class, args);
 }

}

@RestController
@RequestMapping("/blog")
public class BlogController {

    @Autowired
    private BlogMapper blogMapper;

    @GetMapping(value="/query")
    public List<Blog> query()
    {
        return blogMapper.query();
    }
}

@Repository
public interface BlogMapper {
    @Select(value = "select * from blog")
    List<Blog> query();
}

@Data
public class Blog {
    private int id;
    private String title;
}