带有Flyway 4.2.0的Spring Boot 2.1.0

Question

我想将我的新项目升级到Spring Boot 2.1.0版,但我受限于Oracle 11数据库,它受到Flyway 4.2.0库的支持.一切都在Spring Boot 2.0.5版本上正常运行,但是当转到2.1.0版本时,我收到此错误:

java.lang.NoClassDefFoundError: 
org/flywaydb/core/api/configuration/FluentConfiguration

POM配置如下:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.0.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <ojdbc6.version>11.2.0.1</ojdbc6.version>
</properties>

<dependencies>
    <dependency>
        <groupId>com.oracle.jdbc</groupId>
        <artifactId>ojdbc6</artifactId>
        <version>${ojdbc6.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.flywaydb</groupId>
        <artifactId>flyway-core</artifactId>
        <version>4.2.0</version>
    </dependency>
</dependencies>

UPDATE

我能够通过@Configuration(或者当然是添加到主类)解决问题,但问题是它的错误或功能？在2.1.0版之前,所有内容都是通过自动配置完成的,并且开箱即用.

@Bean(initMethod = "migrate")
Flyway flyway() {
    Flyway flyway = new Flyway();
    flyway.setBaselineOnMigrate(true);
    flyway.setDataSource("jdbc:oracle:thin:@localhost:1521:xe", "USER", "PASSWORD1");
    return flyway;
}

Answer 1

我在 PostgreSQL 9.2 中遇到了同样的问题，并使用以下类来解决问题。

请注意，您可能在 Spring Boot 属性中设置的所有自定义属性都将被忽略，因为这会由您自己替换整个 Flyway 自动配置。因此，您可能需要添加一些额外的代码来满足您的需求。

@Configuration
class FlywayConfig {
    @Bean
    fun flyway(dataSource: DataSource): Flyway {
        val flyway = Flyway()
        flyway.dataSource = dataSource
        return flyway
    }

    @Bean
    fun flywayInitializer(flyway: Flyway): FlywayMigrationInitializer {
        return FlywayMigrationInitializer(flyway, null)
    }

    /**
     * Additional configuration to ensure that [EntityManagerFactory] beans depend on the
     * `flywayInitializer` bean.
     */
    @Configuration
    class FlywayInitializerJpaDependencyConfiguration : EntityManagerFactoryDependsOnPostProcessor("flywayInitializer")
}

PS：这是 Kotlin 代码，但您应该能够相当轻松地将其转换为 Java。

Answer 2

使用下面的依赖，会由此解决。

<dependency>
    <groupId>org.flywaydb</groupId>
    <artifactId>flyway-core</artifactId>
    <version>5.2.3</version>
</dependency>