在spring配置文件中设置资源

我正在尝试在弹簧配置中配置推土机。当使用 xml 配置时，它会像

<bean class="org.dozer.spring.DozerBeanMapperFactoryBean">
    <property name="mappingFiles" value="classpath*:dozer/**/*.dzr.xml"/>
</bean>

我如何在配置文件中定义资源。我尝试使用ctx.getResource()但我无法访问配置类中的ApplicationContext。

我尝试了 ContextRefreshedEvent 并从那里添加资源，但仍然没有运气。 （afterPropertiesSet 已被调用，添加的映射将不起作用）

public class ContextRefreshedEventBuilder extends ContextRefreshedEvent {
public ContextRefreshedEventBuilder(ApplicationContext ctx) {
    super(ctx);
    DozerBeanMapperFactoryBean mapper = ctx.getBean(DozerBeanMapperFactoryBean.class);
    try {
        mapper.setMappingFiles(ctx.getResources("classpath*:dozer/**/*.dzr.xml"));
    } catch (IOException e) {
        e.printStackTrace();
    }
}
}

也尝试使用 ClassPathResource 但找不到正确的方法

DozerBeanMapperFactoryBean mapper = new DozerBeanMapperFactoryBean();
mapper.setMappingFiles(new Resource[]{new ClassPathResource("classpath*:dozer/**/*.dzr.xml")});
return mapper;

如何添加 ClassPathResource 作为映射位置？

- -回答 - -

@Bean
public DozerBeanMapperFactoryBean configDozer() throws IOException {
    DozerBeanMapperFactoryBean mapper = new DozerBeanMapperFactoryBean();
    Resource[] resources = new PathMatchingResourcePatternResolver().getResources("classpath*:dozer/**/*.dzr.xml");
    mapper.setMappingFiles(resources);
    return mapper;
}

你需要使用一个ResourcePatternResolver http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/core/io/support/ResourcePatternResolver.html翻译classpath*:dozer/**/*.dzr.xml into a Resource[]。您可以使用 2 个主要选项。

1. 注入ApplicationContext到你的配置类中，将其转换为ResourcePatternResolver并使用getResources方法。 Al Spring 默认应用程序上下文实现实现了ResourcePatternResolver界面。
2. 创建一个PathMatchingResourcePatternResolver有或没有前面提到的上下文。
3. Use the ResourcePatternUtils http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/core/io/support/ResourcePatternUtils.html与注射的ResourceLoader.

使用 ResourcePatternUtils

@Configuration
public class MyConfiguration {

    @Autowired
    private ResourceLoader resourceLoader;

    public DozerBeanMapperFactoryBean mapper() throws IOException {
        DozerBeanMapperFactoryBean mapper = new DozerBeanMapperFactoryBean();
        // ResourceLoader is allowed to be null when using the ResourceLoaderUtils.
        ResourcePatternResolver resolver = ResourceLoaderUtils.getResourcePatternResolver(resourceLoader);
        Resource[] mappingFiles = resolver.getResources("classpath*:dozer/**/*.dzr.xml");
        mapper.setMappingFiles(mappingFiles);
        return mapper;
    }
}

最后一种方法的优点是您不受束缚PathMatchingResourcePatternResolver但只是界面。实用程序类根据注入来确定ResourceLoader它能做什么。人们应该更喜欢这种加载资源的方式。

使用应用程序上下文

@Configuration
public class MyConfiguration {

    @Autowired
    private ApplicationContext context;

    public DozerBeanMapperFactoryBean mapper() throws IOException {
        DozerBeanMapperFactoryBean mapper = new DozerBeanMapperFactoryBean();
        Resource[] mappingFiles = ((ResourcePatternResolver) context).getResources("classpath*:dozer/**/*.dzr.xml");
        mapper.setMappingFiles(mappingFiles);
        return mapper;
    }
}

使用 PathMatchingResourcePatternResolver

@Configuration
public class MyConfiguration {

    private PathMatchingPatternResolver resolver = new PathMatchingPatternResolver();

    public DozerBeanMapperFactoryBean mapper() throws IOException {
        DozerBeanMapperFactoryBean mapper = new DozerBeanMapperFactoryBean();
        Resource[] mappingFiles = resolver.getResources("classpath*:dozer/**/*.dzr.xml");
        mapper.setMappingFiles(mappingFiles);
        return mapper;
    }
}

或者如果您想重用已经存在的ResourceLoader略有不同的版本：

@Configuration
public class MyConfiguration {

    @Autowired
    private ResourceLoader resourceLoader;

    public DozerBeanMapperFactoryBean mapper() throws IOException {
        DozerBeanMapperFactoryBean mapper = new DozerBeanMapperFactoryBean();
        Resource[] mappingFiles = new PathMatchingPatternResolver(resourceLoader).getResources("classpath*:dozer/**/*.dzr.xml");
        mapper.setMappingFiles(mappingFiles);
        return mapper;
    }
}