将文件资源注入Spring bean [英] Inject a file resource into Spring bean

问题描述

将一些文件资源注入Spring bean的好方法是什么? 现在，我自动连接ServletContext并按如下所示使用.在Spring MVC中，这样做更优雅吗?

What is a good way to inject some file resource into Spring bean ? Now i autowire ServletContext and use like below. Is more elegant way to do that in Spring MVC ?

@Controller
public class SomeController {

    @Autowired
    private ServletContext servletContext;

    @RequestMapping("/texts")
    public ModelAndView texts() {
        InputStream in = servletContext.getResourceAsStream("/WEB-INF/file.txt");
        // ...
    }
}

推荐答案

类似以下内容:

@Controller
public class SomeController {

    private Resource resource;

    public void setResource(Resource resource) {
        this.resource = resource;
    }

    @RequestMapping("/texts")
    public ModelAndView texts() {
        InputStream in = resource.getInputStream();
        // ...
        in.close();
    }
}

在您的bean定义中:

In your bean definition:

<bean id="..." class="x.y.SomeController">
   <property name="resource" value="/WEB-INF/file.txt"/>
</bean>

这将使用/WEB-INF/file.txt路径创建一个ServletContextResource，并将其注入到您的控制器中.

This will create a ServletContextResource using the /WEB-INF/file.txt path, and inject that into your controller.

请注意，使用此技术不能使用组件扫描来检测控制器，您需要一个显式的bean定义.

Note you can't use component-scanning to detect your controller using this technique, you need an explicit bean definition.

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