java - Spring Boot中使用YAML配置初始化Bean

Question

我想在 Spring Boot 中初始化 bean 或服务时读取一些属性，例如数据库访问配置。

有人知道好的方法吗？

这是我当前的代码片段。

public class SampleApplication implements ApplicationRunner
{
    @Autowired
    private YAMLConfig myConfig;

    @Override
    public void run(ApplicationArguments args) throws Exception
    {
        System.out.println(myConfig != null); //YAMLConfig has been intialized here
    }

    public SampleApplication()
    {
        System.out.println(myConfig == null); //myConfig is null
    }

    @Configuration
    public static class Config
    {
        @Bean
        @ConditionalOnProperty(value = {"batch.execute"}, havingValue = "SampleApplication")
        public SampleApplication sampleApplication()
        {
            return new SampleApplication();
        }
    }
}

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties
public class YAMLConfig
{
    private String environment;

    public String getEnvironment()
    {
        return environment;
    }

    public void setEnvironment(String environment)
    {
        this.environment = environment;
    }
}

感谢您查看此内容!

Answer 1

在您的 SampleApplication 类中创建此方法

@PostConstruct
public void init() {
    // at this point, all the dependency injection has happened already
    myConfig.doStuff()
}

所有bean初始化完成后，spring会自动调用它。