java - Java类扩展了@Configuration注释的Spring Bean(Java Class extends @Configuration annotated Spring Bean)

Question

I wrote the follow piece of code and It works but i'm not sure why.

(我写了下面的代码，它可以工作，但是我不确定为什么。)

What I wanted is to customize the jdbc configuration of spring-data-jdbc and I extended the configuration with another, what really happen in the IoC Container?

(我想要的是自定义spring-data-jdbc的jdbc配置，然后用另一个扩展配置，在IoC容器中到底发生了什么？)

JdbcConfiguration is @Configuration annotated bean that instantiates a JdbcCustomConversions and i'm able to override this behavior subclassing the whole configuration and specifying ma own method, but i'm not really sure why.

(JdbcConfiguration是@Configuration注释的Bean，它实例化了JdbcCustomConversions ，我可以重写此行为，将整个配置子类化，并指定自己的方法，但我不确定为什么。)

@Configuration
public class CustomJdbcConfiguration extends JdbcConfiguration{

    @Override
    protected JdbcCustomConversions jdbcCustomConversions() {
        return new JdbcCustomConversions(Collections.singletonList(CLobToStringConverter.INSTANCE));
    }

    @ReadingConverter
    enum CLobToStringConverter implements Converter<Clob, String>{

        INSTANCE;

        @Override
        public String convert(Clob source) {

            try {
                return IOUtils.toString(source.getCharacterStream());
            } catch (IOException | SQLException e) {
                throw new RuntimeException(e);
            }
        }

    }
}

  ask by Griso translate from so

Answer 1

等待大神答复