Java Spring Boot 上传文件和预览文件地址解析

@RequestMapping(value ="/upload",method = RequestMethod.POST)
@Permission(isAjax=false)
public String Upload(HttpServletRequest request, HttpServletResponse response,@RequestParam("files") MultipartFile[] files) {
List<String> fileurl=new ArrayList<String>();
try {

if(files.length>0){
String uploaddir="d:/upload/2017-12-18/";
File dir=new File(uploaddir);
if(!dir.exists()){
dir.mkdirs();
}
for(MultipartFile file :files){
if(!file.isEmpty()){
String suffix=file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
String filename=String.format("%s%s", UUID.randomUUID().toString(),suffix);
File fileinfo=new File(String.format("%s%s", uploaddir,filename));
FileUtils.writeByteArrayToFile(fileinfo, file.getBytes());
String url=String.format("/2017-12-18/%s", filename);
fileurl.add(url);
}
}
}
// fileurl 图片地址清单

} catch (IOException e) { }
}

@Controller
public class HomeController { private final ResourceLoader resourceLoader; @Autowired
public HomeController(ResourceLoader resourceLoader) {
this.resourceLoader = resourceLoader;
} @RequestMapping(method = RequestMethod.GET, value = "/{yyyy}-{MM}-{dd}/{filename:.+}")
@ResponseBody
public ResponseEntity<?> getFile(@PathVariable String yyyy, @PathVariable String MM, @PathVariable String dd, @PathVariable String filename) {
try {
return ResponseEntity.ok(resourceLoader.getResource(
"file:" + Paths.get("d:/upload/" + yyyy+"-"+MM+"-"+dd + "/", filename).toString()));
} catch (Exception e) {
return ResponseEntity.notFound().build();
}
}}