import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
@Bean
public FlywayMigrationStrategy cleanMigrateStrategy() {

    FlywayMigrationStrategy strategy = new FlywayMigrationStrategy() {

        @Override
        public void migrate(Flyway flyway) {

            if (clean) {
                logger.info("Clean DB with Flyway");
                flyway.clean();
            } else {
                logger.info("Don't clean DB with Flyway");
            }

            flyway.migrate();
        }
    };

    return strategy;
}
 

import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
@Bean
@Primary
public FlywayMigrationStrategy flywayMigrationStrategy() {
    return flyway -> {
        // terrible hack - using system properties to pass data to migration
        System.setProperty(AbstractMigrateUsersToIncludeUsernames.COMMUNITY_PROTOCOL, "HTTP");
        System.setProperty(AbstractMigrateUsersToIncludeUsernames.COMMUNITY_HOST, getProperty(COMMUNITY_HOST_PROPERTY, COMMUNITY_HOST));
        System.setProperty(AbstractMigrateUsersToIncludeUsernames.COMMUNITY_PORT, getProperty(COMMUNITY_PORT_PROPERTY, String.valueOf(COMMUNITY_PORT)));

        flyway.migrate();

        System.clearProperty(AbstractMigrateUsersToIncludeUsernames.COMMUNITY_PROTOCOL);
        System.clearProperty(AbstractMigrateUsersToIncludeUsernames.COMMUNITY_HOST);
        System.clearProperty(AbstractMigrateUsersToIncludeUsernames.COMMUNITY_PORT);
    };
}
 

import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
/**
 * Configures the Flyway migration strategy to clean the DB before migration first.  This is used
 * as the default unless the Spring Profile "production" is active.
 *
 * @return the clean-migrate strategy
 */
@Bean
@Profile("!production")
public FlywayMigrationStrategy cleanMigrationStrategy() {
  FlywayMigrationStrategy strategy = new FlywayMigrationStrategy() {
    @Override
    public void migrate(Flyway flyway) {
      logger.info("Using clean-migrate flyway strategy -- production profile not active");
      flyway.clean();
      flyway.migrate();
    }
  };

  return strategy;
}
 

import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
/**
 * Configures the Flyway migration strategy to clean the DB before migration first.  This is used
 * as the default unless the Spring Profile "production" is active.
 * @return the clean-migrate strategy
 */
@Bean
@Profile("!production")
public FlywayMigrationStrategy cleanMigrationStrategy() {
  FlywayMigrationStrategy strategy = new FlywayMigrationStrategy() {
    @Override
    public void migrate(Flyway flyway) {
      logger.info("Using clean-migrate flyway strategy -- production profile not active");
      flyway.clean();
      flyway.migrate();
    }
  };

  return strategy;
}
 

import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
@Bean
public FlywayMigrationStrategy cleanMigrateStrategy() {
    FlywayMigrationStrategy strategy = new FlywayMigrationStrategy() {
        @Override
        public void migrate(Flyway flyway) {
            flyway.clean();
            flyway.migrate();
        }
    };

    return strategy;
}
 

import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
@Bean
public FlywayMigrationStrategy flywayMigrationStrategy() {

    return new SqlServerFlywayTestMigrationStrategy(dataSourceProperties);
}
 

import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy; //导入依赖的package包/类
/**
 * Disable flyway automatic migration on startup.
 * I will be piloted using CLI
 * @return No operation flyway migration strategy
 */
@Bean
FlywayMigrationStrategy flywayMigrationStrategy() {
    return flyway -> {};
}