如何用java中的附加信息上传文件

Question

我正在使用apache commons-fileupload来上传文件。但是，我无法传递有关附件的更多信息。例如，用户希望在上传特定文件的同时添加附件信息。因此，我将评论与附件一起发送。但使用commons-fileupload，我只能得到附件，但我无法获得评论。下面的代码是形式

<form action"taskcontroller" method="post" enctype="multipart/form-data"> 
     <label for="filename_1">File: </label> 
     <input id="filename_1" type="file" name="filename_1" size="50"/><br/> 
     comments:<input type='text' name='comments' /> 
     <input type="submit" value="upload" name="command" /> 
</form> 

和下面的代码是处理请求，

boolean isMultipart = ServletFileUpload.isMultipartContent(request); 
if (isMultipart) { 
    FileItemFactory factory = new DiskFileItemFactory(); 
    ServletFileUpload upload = new ServletFileUpload(factory); 
    List<FileItem> items = upload.parseRequest(request); 
    Iterator iterator = items.iterator(); 
    while (iterator.hasNext()) { 
     FileItem item = (FileItem) iterator.next(); 

     if (!item.isFormField()) { //ignore the form element 
      String fileName = item.getName(); 
      // TODO filesize int is it ok? 
      int size = (int) item.getSize(); 
      String root = "";//Set the root 
      File path = new File(root + "/uploads"); 
      if (!path.exists()) { 
       boolean status = path.mkdirs(); 
      } 

      item.write(uploadedFile); //write file to disk 
     } 
    } 
} 

，但我无法获取评论信息...

Answer 1

当您上传文件服务器将一个唯一的ID添加到照片中，并将评论存储在评论表中，并将照片存储在评论表中以唯一地标识照片的评论。

Answer 2

检查从现场isFormField()和检索领域getFieldName()的细节和getString()

boolean isMultipart = ServletFileUpload.isMultipartContent(request); 
if (isMultipart) { 
    FileItemFactory factory = new DiskFileItemFactory(); 
    ServletFileUpload upload = new ServletFileUpload(factory); 
    List<FileItem> items = upload.parseRequest(request); 
    Iterator iterator = items.iterator(); 
    while (iterator.hasNext()) { 
     FileItem item = (FileItem) iterator.next(); 
     String name; 
     String comment; 

    //Check for Form Field i.e. Comment field 

     if (item.isFormField()) { 
     name= item.getFieldName(); //Comment Field Name 
     comment = item.getString(); // Comment 
     } 

     //Check for attachment field 

     if (!item.isFormField()) { //ignore the form element 
      String fileName = item.getName(); 
      // TODO filesize int is it ok? 
      int size = (int) item.getSize(); 
      String root = "";//Set the root 
      File path = new File(root + "/uploads"); 
      if (!path.exists()) { 
       boolean status = path.mkdirs(); 
      } 

      item.write(uploadedFile); //write file to disk 
     } 
    } 
}