java - 如何在java中上传带有附加信息的文件

Question

我正在使用 apache commons-fileupload 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时添加附件信息。所以我将评论连同附件一起发送。但是使用commons-fileupload，我只能获取附件，但无法获取评论。下面的代码是表格

<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>

下面的代码是处理请求的，

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  
        }  
    }  
}

但是我无法获取评论信息...

Answer 1

从字段 isFormField() 检查并检索字段 getFieldName() 和 getString() 的详细信息

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  
        }  
    }  
}