spring boot 配置文件下载

@Configuration
public class SpringBootConfigurer extends WebMvcConfigurationSupport {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("*").addResourceLocations("classpath:/static/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
        //String filePath = System.getProperty("user.dir");//当前项目目录
        //registry.addResourceHandler("/file/**").addResourceLocations("file:"+filePath + "/file/");
        registry.addResourceHandler("/file/**").addResourceLocations("file:D:/mydoc/file/");  // 配置为D盘file目录
    }

server:
  port: 8080
  servlet:
    context-path: /app

使用方式：例如
http://localhost:8080/app/file/myFile.txt

就可以下载 myFile.txt文件