The target

Integrate memory database HSQLDB in SpringBoot.

why

In-memory databases such as H2, HSQLDB, Derby and SQLite are small and cute, making small server-side demos very useful. The biggest feature is that you don’t need to install another database.

steps

  1. Modify the POM.xml file
<dependency>
   <groupId>org.hsqldb</groupId>
   <artifactId>hsqldb</artifactId>
</dependency>
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  1. Modify the project configuration file application.yml
spring: datasource: username: hsp password: 123456 url: jdbc:hsqldb:mem://localhost/blogdb; shutdown=true driver-class-name: org.hsqldb.jdbcDriver schema: classpath:schema.sql data: classpath:data.sql initialization-mode: always continue-on-error: trueCopy the code
  1. Add the initialization data file
  • Create table script: schema.sql
CREATE TABLE blog (
  id INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 1) NOT NULL PRIMARY KEY,
  title varchar(255) DEFAULT NULL,
);
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  • Data import script: data.sql
Insert into blog(id,title) values(1,' 1 ');Copy the code
  1. Start class: HspApplication
@MapperScan({"cn.hsp.blog"})
@SpringBootApplication
public class HspApplication {

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

}
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  1. The Controller class: BlogController
@RestController @RequestMapping("/blog") public class BlogController { @Autowired private BlogMapper blogMapper; @GetMapping(value="/query") public List<Blog> query() { return blogMapper.query(); }}Copy the code
  1. The Mapper class: BlogMapper
@Repository
public interface BlogMapper {
    @Select(value = "select * from blog")
    List<Blog> query();
}
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  1. Data beans: blogs
@Data
public class Blog {
    private int id;
    private String title;
}
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Engineering screenshots

run

Run HspApplication

The effect

Complete source code

Gitee.com/hspbc/sprin…

About me

Xiamen university computer professional | huawei eight years senior engineer Ten years software development experience, 5 years experience in teaching programming training Currently engaged in the teaching of programming, software development, software class graduation design guidance. All programming materials and open source projects can be found at juejin.cn/post/700279…

Integrated in-memory database family

SpringBoot integrated memory database H2 SpringBoot integrated memory database Derby SpringBoot integrated memory database HSQLDB SpringBoot integrated memory database Sqlite