代码FileController这里面的代码实现，完全可以参考ResourceHttpRequestHandler#handleRequest@RestController
public class FileController {
private static final int BUFFER_SIZE = 4 * 1024;
@RequestMapping(path = "
Getting Started4.3. Writing the Code4.3.1. The @RestController and @RequestMapping Annotations4.3.2. The @EnableAutoConfiguration Annotation4.3.3. The “main” Method4.4. Running the Example4.5. Creati
