Spring boot2.x中集成H2数据库代码实例

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

<dependency>
  <groupId>com.h2database</groupId>
  <artifactId>h2</artifactId>
  <scope>runtime</scope>
</dependency>

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

spring.jpa.database=h2
spring.jpa.show-sql=true
#ddl执行方式，update create 等

spring.datasource.url=jdbc:h2:./data/test;AUTO_SERVER=TRUE
spring.jpa.hibernate.ddl-auto=update
spring.datasource.username=sa
spring.datasource.password=123456
spring.datasource.driverClassName=org.h2.Driver

spring.h2.console.path=/h2-console
spring.h2.console.enabled=true

package com.example.demo.domain;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import javax.persistence.*;

@Entity
@Table(name = "user")
@Data
public class User {
  @Id
  @GeneratedValue(strategy= GenerationType.AUTO)
  private int id;
  private String name;

  public int getId() {
    return id;
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }
}

package com.example.demo.dao;

import com.example.demo.domain.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface UserRepository extends JpaRepository<User,Integer> {
  List<User> getUsersByName(String Name);
}

package com.example.demo.controller;

import com.example.demo.dao.UserRepository;
import com.example.demo.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class Demo {
  @Autowired
  private UserRepository repo;

  @RequestMapping("find")
  public List<User> find() {
    return (List<User>) repo.findAll();
  }
}

package com.example.demo;

import com.example.demo.dao.UserRepository;
import com.example.demo.domain.User;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class DemoApplication {

  @Bean
  InitializingBean saveData(UserRepository repo){

    return ()->{
      User u = new User();
      u.setName("abc");
      repo.save(u);
      User u1 = new User();
      u1.setName("zyx");
      repo.save(u1);

    };
  }

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

}