ServletFileUpload #parseRequest（request）缺少请求中的第一个文件

Question

我需要一次上传多个文件并保存在服务器中。但是ServletFileUpload #parseRequest（request）方法缺少请求中的第一个文件，即第0个索引文件，并从索引1返回文件列表，依此类推。

请求：

请求标题：

POST /restcon/fileUploadTest HTTP/1.1
Host: localhost:8089
Connection: keep-alive
Content-Length: 1371330
Pragma: no-cache
Cache-Control: no-cache
Origin: chrome-extension://hgmloofddffdnphfgcellkdfbfbjeloo
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.106 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryd9n7NKPBSR9245hd
Accept: */*
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.8,te;q=0.6

请求有效负载：

------WebKitFormBoundaryd9n7NKPBSR9245hd
Content-Disposition: form-data; name="fileUpload"; filename="Hydrangeas.jpg"
Content-Type: image/jpeg

------WebKitFormBoundaryd9n7NKPBSR9245hd
Content-Disposition: form-data; name="fileUpload1"; filename="Jellyfish.jpg"
Content-Type: image/jpeg

------WebKitFormBoundaryd9n7NKPBSR9245hd--

Java代码：

//为基于磁盘的文件项创建工厂     DiskFileItemFactory factory = new DiskFileItemFactory（）;

// Configure a repository (to ensure a secure temp location is used)
File repository = new File(System.getProperty("java.io.tmpdir"));
factory.setRepository(repository);

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
try {
    List<FileItem> files = upload.parseRequest(req);
    System.out.println("files size : "+files.size());
    for(FileItem file : files) {
        String name = file.getName();
        System.out.println("file name : "+ name);
    }
} catch (FileUploadException e) {
}

返回的List包含Jellyfish.jpg（第二个文件）并且不包含Hydrangeas.jpg（第一个文件）。