在SpringBoot中集成内存数据库Derby.
像H2、hsqldb、derby、sqlite这样的内存数据库，小巧可爱，做小型服务端演示程序，非常好用。最大特点就是不需要你另外安装一个数据库。
修改pom.xml文件
<dependency> <groupId>org.apache.derby</groupId> <artifactId>derby</artifactId> <scope>runtime</scope> </dependency>
修改项目配置文件application.yml
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
添加初始化数据文件
建表脚本：schema.sql
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) );
导入数据脚本：data.sql
insert into blog(id,title) values(1,'花生皮编程博客');
启动类：HspApplication
@MapperScan({"cn.hsp.blog"})
@SpringBootApplication
public class HspApplication {
public static void main(String[] args) {
SpringApplication.run(HspApplication.class, args);
}
}
Controller类：BlogController
@RestController
@RequestMapping("/blog")
public class BlogController {
@Autowired
private BlogMapper blogMapper;
@GetMapping(value="/query")
public List<Blog> query()
{
return blogMapper.query();
}
}
Mapper类：BlogMapper
@Repository
public interface BlogMapper {
@Select(value = "select * from blog")
List<Blog> query();
}
数据bean：Blog
@Data
public class Blog {
private int id;
private String title;
}
运行HspApplication即可
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