文件上传maven依赖

    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.2</version>
    </dependency>

    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.5</version>
    </dependency>
    

Spring MVC bean配置

  <!-- 文件上传 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="defaultEncoding" value="utf-8"></property>
        <property name="maxUploadSize" value="5120000"></property>
        <property name="uploadTempDir" value="/upload"></property>
    </bean>

    
    /**
     * Created by cody on 2016/12/26.
     *
     * 文件上传Controller
     *
     *
     */
    @Controller
    @RequestMapping("upload")
    public class UploadController {
        private static final Logger logger = Logger.getLogger(UploadController.class);
        @PostConstruct
        public void init(){
            logger.debug("----------- UploadController init() ----------");
        }
    
        @RequestMapping(value = "image",method = RequestMethod.POST)
        @ResponseBody
        public Object fileUpload(@RequestParam("file") MultipartFile file, HttpServletRequest request,
                                 @Autowired ApiMessage apiMessage){
    
            if(file != null && !file.isEmpty()){
                String originalFilename = file.getOriginalFilename();
                logger.debug(originalFilename);
    
                //文件保存路径
                File outPath = new File(request.getServletContext().getRealPath("/"),"fileDir");
                if(!outPath.exists() || !outPath.isDirectory()){
                    outPath.mkdirs();
                }
    
                //保存的文件dest File
                File outFile = new File(outPath,file.getOriginalFilename());
                logger.debug(outFile.getAbsolutePath());
                try {
                    //从缓存文件复制到目标文件
                    file.transferTo(outFile);
    
                    //保存文件信息，返回ID
    
    
                } catch (IOException e) {
                    e.printStackTrace();
                    logger.debug(e);
                }
            }
    
            return apiMessage;
        }
    
    
    
    }