spring aot处理时如何使用Properties配置文件

Question

我想在aop处理时使用MybatisProperties的配置（对应application.yml），但是一直无法获取对应的值

public class MybatisBeanFactoryInitializationAotContribution implements BeanFactoryInitializationAotContribution {

    private final MybatisProperties mybatisProperties;

    public MybatisBeanFactoryInitializationAotContribution(MybatisProperties mybatisProperties) {
        this.mybatisProperties = mybatisProperties;
    }

    @Override
    public void applyTo(GenerationContext generationContext, BeanFactoryInitializationCode beanFactoryInitializationCode) {
        log.info("MybatisBeanFactoryInitializationAotContribution {}", mybatisProperties.getMapperLocations());

        RuntimeHints hints = generationContext.getRuntimeHints();

        String[] mapperLocations = mybatisProperties.getMapperLocations();
        if (mapperLocations != null) {
            log.info("mapperLocations-{}", mapperLocations);
            Stream.of(mapperLocations).map(item -> item.replace("classpath:/", "")).forEach(hints.resources()::registerPattern);
        }
    }

}

如何正常读取配置bean文件进行AOT处理

遇到的问题：

aot处理阶段读取的mapperLocations为空。

理想的结果：

AOT处理阶段可以正常读取mapperLocations的值

这是我的配置文件：

mybatis:
  configuration:
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath:/mapper/*.xml

Answer 1

在这里回答

可以通过环境手动绑定MybatisProperties来获取对象

@Slf4j
public class MybatisBeanFactoryInitializationAotContribution implements BeanFactoryInitializationAotContribution {

    private final Environment environment;

    public MybatisBeanFactoryInitializationAotContribution(Environment environment) {
        this.environment = environment;
    }

    @Override
    public void applyTo(GenerationContext generationContext, BeanFactoryInitializationCode beanFactoryInitializationCode) {

        MybatisProperties mybatisProperties = Binder.get(environment)
                .bind("mybatis", Bindable.of(MybatisProperties.class))
                .get();
        log.info("properties.getMapperLocations()");
        log.info("{}", mybatisProperties.getMapperLocations());
        log.info("properties.getMapperLocations()");

        String[] mapperLocations = mybatisProperties.getMapperLocations();

        RuntimeHints hints = generationContext.getRuntimeHints();
        if (mapperLocations != null) {
            log.info("mapperLocations-{}", mapperLocations);
            Stream.of(mapperLocations).map(item -> item.replace("classpath:/", "")).forEach(hints.resources()::registerPattern);
        }
    }

}

结果：

2024-12-05 22:17:09.049  INFO 3752 --- [           main][] BeanFactoryInitializationAotContribution : properties.getMapperLocations()
2024-12-05 22:17:09.049  INFO 3752 --- [           main][] BeanFactoryInitializationAotContribution : classpath:/mapper/*.xml
2024-12-05 22:17:09.051  INFO 3752 --- [           main][] BeanFactoryInitializationAotContribution : properties.getMapperLocations()