对于那些使用MysqlDriver的人，我尝试使用@bean注释的Init属性，它是有效的。

在resources\Scripts路径下创建Schema和Data sql文件后

在application.properties中添加该行

spring.jpa.hibernate.ddl-auto=none

编辑应用程序内容:

package com.spring_mvaen.demo;

import org.springframework.boot.CommandLineRunner;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.jdbc.datasource.init.DatabasePopulator;
import org.springframework.jdbc.datasource.init.DatabasePopulatorUtils;
import org.springframework.jdbc.datasource.init.ResourceDatabasePopulator;

@SpringBootApplication
public class DemoApplication implements CommandLineRunner {

  public static void main(String[] args) {
    SpringApplication.run(DemoApplication.class, args);
  }
  @Override
  public void run(String... arg0) throws Exception {
    System.out.println("Hello world from Command Line Runner");
  }

  @Bean(name = "dataSource")
  public DriverManagerDataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
    dataSource.setUrl("jdbc:mysql://localhost:3306/db_spring_rest?useUnicode=true&useLegacyDatetimeCode=fa    lse&serverTimezone=UTC&createDatabaseIfNotExist=true&allowPublicKeyRetrieval=true&useSSL=false");
    dataSource.setUsername("root");
    dataSource.setPassword("root");

    // schema init
    Resource initSchema = new ClassPathResource("scripts/schema.sql");
    Resource initData = new ClassPathResource("scripts/data.sql");
    DatabasePopulator databasePopulator = new ResourceDatabasePopulator(initSchema, initData);
    DatabasePopulatorUtils.execute(databasePopulator, dataSource);

    return dataSource;
  }


}

下面是我得到答案的方法:

@Component
public class ApplicationStartup implements ApplicationListener<ApplicationReadyEvent> {

    /**
     * This event is executed as late as conceivably possible to indicate that
     * the application is ready to service requests.
     */

    @Autowired
    private MovieRepositoryImpl movieRepository;

    @Override
    public void onApplicationEvent(final ApplicationReadyEvent event) {
        seedData();
    }

    private void seedData() {
        movieRepository.save(new Movie("Example"));

        // ... add more code
    }

}

感谢本文作者:

http://blog.netgloo.com/2014/11/13/run-code-at-spring-boot-startup/

如果我只想插入简单的测试数据，我通常实现一个ApplicationRunner。这个接口的实现在应用程序启动时运行，可以使用自动连接的存储库来插入一些测试数据。

我认为这样的实现会比您的实现稍微明确一些，因为接口暗示您的实现包含一些您希望在应用程序准备好之后直接执行的操作。

你的实现看起来像这样:

@Component
public class DataLoader implements ApplicationRunner {

    private UserRepository userRepository;

    @Autowired
    public DataLoader(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    public void run(ApplicationArguments args) {
        userRepository.save(new User("lala", "lala", "lala"));
    }
}

一种可能是使用了不正确的JDBC URL。确保它是jdbc:h2:mem:testdb

你快成功了!

@Component
public class DataLoader implements CommandLineRunner {

    private UserRepository userRepository;

    public DataLoader(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    @Override
    public void run(String... args) throws Exception {
         LoadUsers()
    }

    private void LoadUsers() {
        userRepository.save(new User("lala", "lala", "lala"));
    }
}

你可以这样使用:

@SpringBootApplication  
public class Application {

@Autowired
private UserRepository userRepository;

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

@Bean
InitializingBean sendDatabase() {
    return () -> {
        userRepository.save(new User("John"));
        userRepository.save(new User("Rambo"));
      };
   }
}