具有 Liquibase 重载属性的 Spring-boot

Question

我正在使用 Spring Boot 和 Liquibase。
使用此网址作为指南

http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/

在 pom.xml ，存在以下条目，以便 spring boot 了解 liquibase。

<dependency>
        <groupId>org.liquibase</groupId>
        <artifactId>liquibase-core</artifactId>
</dependency>

并将更改日志文件放在资源文件夹中。
db.changelog-master.xml

现在 Spring Boot 首先尝试在类路径中找到 db.changelog-master.yaml 并抛出这样的异常。

找不到变更日志位置:类路径资源 [db/changelog/db.changelog-master.yaml

为了解决这个问题，我在我的类(class)中添加了如下所示的 bean 并尝试设置 changeLog 属性。

@Configuration
@ComponentScan
@EnableAutoConfiguration
public class SampleDataJpaApplication {


@Autowired
LiquibaseProperties properties;
@Autowired
private DataSource dataSource;

@Bean
public SpringLiquibase liquibase() {
    SpringLiquibase liquibase = new SpringLiquibase();
    properties.setChangeLog("classpath:/db/changelog/db.changelog-master.xml");
    liquibase.setChangeLog(this.properties.getChangeLog());
    liquibase.setContexts(this.properties.getContexts());
    liquibase.setDataSource(this.dataSource);
    liquibase.setDefaultSchema(this.properties.getDefaultSchema());
    liquibase.setDropFirst(this.properties.isDropFirst());
    liquibase.setShouldRun(this.properties.isEnabled());
    return liquibase;
}

public static void main(String[] args) throws Exception {
    Logger logger = LoggerFactory.getLogger("SampleDataJpaApplication");
    SpringApplication springApplication = new SpringApplication();
    springApplication.run(SampleDataJpaApplication.class, args);
}

}

但它的消息失败了。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sampleDataJpaApplication': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties sample.data.jpa.SampleDataJpaApplication.properties; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties sample.data.jpa.SampleDataJpaApplication.properties; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.boot.autoconfigure.liquibase.LiquibaseProperties] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

请在此处提供输入，为什么我会收到此异常，或者是否有任何其他可用的方法来覆盖同一类，以便我可以更改 liquibase 属性的 changeLog 属性。

Answer 1

我不完全确定更改日志的确切运行时路径是什么，但为什么不使用 application.properties 中的“liquibase.*”属性？ ?您应该可以省略 Liquibase @Bean让 Boot 为您完成。

如果您更喜欢添加您自己的 Liquibase @Bean然后接受提示并确保您定义了 LiquibaseProperties bean 也是(例如通过声明 @EnableConfigurationProperties(LiquibaseProperties.class) )。