spring boot+angularjs实现文件上传

spring boot实现文件上传

controller:

@RequestMapping(value = "/{id}/upload-change-type", method = POST)
    @ResponseBody
    public void uploadChangeFile(@PathVariable long id,MultipartHttpServletRequest req) {
        try {
            service.uploadChangeFile(id,req.getFile("changeFile").getInputStream(),req.getFile("changeFile").getOriginalFilename());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

service:

public void uploadChangeFile(long id, InputStream in,String fileName) throws IOException {
        StatusChangeType sct = statusChangeTypeRepo.findById(id);
        String suffix = fileName.substring(fileName.lastIndexOf(".")+1);
        File file = fileService.getFileOfChange(sct,suffix);    
        if(file.exists())
            file.delete();
        FileUtils.copyInputStreamToFile(in, file);
    }

fileService.getFileOfChange(sct,suffix);

 public File getFileOfChange(StatusChangeType sct,String suffix) {
        File dir = FileUtils.
                getFile(getTEMP_SUBDIR());
        if(!dir.exists()) {
            dir.mkdirs();
        }   
        String fileName = sct.getId().toString()+"-"+sct.getMajor()+"-"+sct.getMinor()+"."+suffix;
        File ret = new File(dir,fileName);
        sct.setChangeFile(dir+"\\"+fileName);
        statusChangeTypeRepo.save(sct);
        return ret;     
    }