Spring文件上传

   <dependency>
          <groupId>commons-lang</groupId>
          <artifactId>commons-lang</artifactId>
          <version>2.6</version>
      </dependency>
      <dependency>
          <groupId>commons-io</groupId>
          <artifactId>commons-io</artifactId>
          <version>2.4</version>
      </dependency>
      <dependency>
          <groupId>commons-fileupload</groupId>
          <artifactId>commons-fileupload</artifactId>
          <version>1.2.2</version>
      </dependency>

      <dependency>
          <groupId>org.hibernate.validator</groupId>
          <artifactId>hibernate-validator</artifactId>
          <version>6.1.5.Final</version>
      </dependency>

/*
value = "/myupload"是路由地址
method = RequestMethod.POST  规定POST请求
*/
@RequestMapping(value = "/myupload", method = RequestMethod.POST)
    public String myupload(MultipartFile photo, HttpSession session) {
        //获取浏览器上传的文件名称
        String filename = photo.getOriginalFilename();
        //获取文件后缀
        String suffix = filename.substring(filename.lastIndexOf("."));
        //重新瓶装文件名称
        filename = UUID.randomUUID().toString() + suffix;
        System.out.println(filename);
        //获取项目的存储路径， 并在上下文中创建photo的文件夹
        String path = session.getServletContext().getRealPath("photo");
        System.out.println(path);
        File file = new File(path);
        //不存在就创建路径
        if (!file.exists()) {
            file.mkdir();
        }
        //F:\apache-tomcat-8.5.75\webapps\ROOT\photo\0b4800c3-76ec-4d6d-a262-b52875b89033.txt
        filename = path + "/" + filename;
        File updatefile = new File(filename);
        try {
            //执行文件上传
            photo.transferTo(updatefile);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "index";
    }