springmvc多文件上传

@Controller
public class MultiController {

    // 处理器方法
    @RequestMapping(value = "/two.do")
    public String doFirst(HttpSession session,
            @RequestParam MultipartFile[] uploadFile) throws Exception {
        for (MultipartFile item : uploadFile) {
            // 1.获取文件名称
            String filename = item.getOriginalFilename();
            // 6.必须选择上传文件
            if (item.getSize() > 0) {
                // 5.限制文件类型
                if (filename.endsWith("jpg") || filename.endsWith("png")
                        || filename.endsWith("txt")) {
                    // 2.获取保存的前路径
                    String rootPath = session.getServletContext().getRealPath(
                            "upload");
                    // 3.拼接路径
                    File realPath = new File(rootPath, filename);
                    // 4.保存
                    item.transferTo(realPath);
                } else {
                    return "/error.jsp";
                }
            } else {
                return "/error.jsp";
            }
        }
        return "/two.jsp";
    }
}