h2database在springboot中的使用教程

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

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

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>

    <dependency>
      <groupId>com.h2database</groupId>
      <artifactId>h2</artifactId>
      <scope>runtime</scope>
      <version>1.4.193</version><!--低版本，支持访问内存数据库-->
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>2.1.1</version>
    </dependency>
</dependencies>

server:
 port: 8080

spring:
 datasource:
  driver-class-name: org.h2.Driver
#  schema: classpath:db/schema-h2.sql #初始化建表
#  data: classpath:db/data-h2.sql #初始化数据
#  url: jdbc:h2:mem:test  #不持久化，放在内存中
  url: jdbc:h2:~/test
  username: root
  password: test
 h2:
  console:
   path: /h2-console
   enabled: true #必须配置，不然无法访问

package demosimple.h2;


import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("demosimple.h2.mapper")
public class Application {

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

package demosimple.h2.controller;

import demosimple.h2.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

  @Autowired
  UserMapper userMapper;

  @GetMapping("/test")
  public Object test(){
    return userMapper.getById(1L);
  }
}

package demosimple.h2.mapper;

import demosimple.h2.pojo.User;
import org.apache.ibatis.annotations.Select;

public interface UserMapper {
  @Select("select * from user where id=#{id}")
  public User getById(Long id);
}

package demosimple.h2.pojo;

import lombok.Data;

@Data
public class User {
  private Long id;
  private String name;
  private Integer age;
  private String email;
}

 <dependency>
    <groupId>com.h2database</groupId>
    <artifactId>h2</artifactId>
    <scope>runtime</scope>
    <version>1.4.193</version> <!--低版本，支持访问内存数据库-->
  </dependency>