springboot操作静态资源文件的方法

spring.mvc.static-path-pattern=/** # Path pattern used for static resources.

└─resources
  │ application.yml
  │
  ├─static
  │ ├─css
  │ │   index.css
  │ │
  │ └─js
  │     index.js
  │
  └─templates
      index.html

<link rel="stylesheet" type="text/css" href="/css/index.css" rel="external nofollow" >
<script type="text/javascript" src="/js/index.js"></script>

@Configuration
public class MyWebAppConfigurer implements WebMvcConfigurer {
  // event.share.image.dir=/data/share/image/
  @Value("${event.share.image.dir}")
  private String outputDir;
  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/share/image/**").addResourceLocations(
        "file:"+outputDir);
  }
}

registry.addResourceHandler("/share/image/**").addResourceLocations(
        "classpath:"+outputDir); // 把file换成classpath

private static final String BACKGROUND_IMAGE = "share/background.jpg";
File file = new ClassPathResource(BACKGROUND_IMAGE).getFile();
InputStream is = new ClassPathResource(BACKGROUND_IMAGE).getInputStream();

private static final String BACKGROUND_IMAGE = "classpath:share/background.jpg";
File file = ResourceUtils.getFile(BACKGROUND_IMAGE);