blocks|key|1349743|text|我可以让我的客户使用Acrobat和PDF一起导出XFDF文件(包含字段名)，这完全避免了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1349744|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I can get my client to export the XFDF file (which contains field names) using Acrobat along with the PDF, which avoids this problem completely.

blocks|key|1349843|text|简单！您已经在使用pdftk了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1349844|#+pdftk+input.pdf+dump_data_fields|code-block|syntax|javascript|1349845|它将输出字段名称，字段类型，它的一些属性(如下拉列表或文本对齐的选项)，甚至工具提示文本(我发现这非常有用)|1349846|我唯一缺少的就是现场坐标。|1349847|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Easy! You are using pdftk already

<pre><code># pdftk input.pdf dump_data_fields
</code></pre>

It will output Field name, field type, some of it's properties (like what are the options for dropdown list or text alignment) and even a Tooltip text (which I found to be extremely useful)

The only thing I'm missing is field coordinates...

blocks|key|1349975|text|这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1349976|+pdftk+1.pdf+dump_data_fields+output+test2.txt|code-block|syntax|javascript|1349977|然后，当使用密码加密文件时，您可以通过以下方式读取该文件|1349978|+pdftk+1.pdf+input_pw+YOUR_PASSWORD_GOES_HERE+dump_data_fields+output+test2.txt|1349979|这花了我2个小时才做对，所以希望我能为您节省一些时间:)|1349980|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

This worked for me:

<pre><code> pdftk 1.pdf dump_data_fields output test2.txt
</code></pre>

Then when the file is encrypted with a password, this is how you can read from it

<pre><code> pdftk 1.pdf input_pw YOUR_PASSWORD_GOES_HERE dump_data_fields output test2.txt
</code></pre>

This took me 2 hours to get right, so hopefully i save you some time :)

blocks|key|1134736|text|考虑到pdftk是弃件，可以使用qpdf库将元数据转储为JSON格式，使用jq只过滤与表单相关的数据：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1134737|qpdf+inout.pdf+--json+%7C+jq+'.acroform.fields'|code-block|syntax|javascript|1134738|qpdf是一个轻量级的跨平台自由/开源软件库，而jq是一个针对JSON的过滤程序(就像grep是一个针对行的过滤程序)。如果您不希望使用jq或JSON，则可以始终使用qpdf+input.pdf进行转储，然后自己在转储中查找元数据。|1134739|entityMap^0|3|5|G|4|11|2|0|0|0|4|O|2|17|4|1W|2|2B|E|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|N|$]]

Considering <code>pdftk</code> is abandonware, you can use <code>qpdf</code> library to dump the metadata in JSON format, and use <code>jq</code> to filter only the form relevant data:
<pre><code>qpdf inout.pdf --json | jq '.acroform.fields'
</code></pre>
<code>qpdf</code> is a lightweight cross-platform FOSS library and <code>jq</code> is a filtering program for JSON (like <code>grep</code> is a filtering program for lines). If you'd rather not use <code>jq</code> or JSON, you can always dump using <code>qpdf input.pdf</code> then look for the metadata yourself in the dump.

blocks|key|1349797|text|我使用了以下代码，使用来自WebSupergoo的ABCpdf，但我想大多数库都有类似的类：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1349798|protected+void+Button1_Click(object+sender,+EventArgs+e)
++++{
++++++++Doc+thedoc+=+new+Doc();
++++++++string+saveFile+=+"~/docs/f1_filled.pdf";
++++++++System.Text.StringBuilder+sb+=+new+System.Text.StringBuilder();
++++++++thedoc.Read(Server.MapPath("~/docs/F1_2010.pdf"));
++++++++foreach+(Field+fld+in+thedoc.Form.Fields)
++++++++{
++++++++++++if+(!(fld.Page+==+null))
++++++++++++{
++++++++++++++++sb.AppendFormat("Field:+{0},+Type:+{1},page:+{4},x:+{2},y:+{3}\n",+fld.Name,+fld.FieldType.ToString(),+fld.Rect.Left,+fld.Rect.Top,+fld.Page.PageNumber);
++++++++++++}
++++++++++++else
++++++++++++{
++++++++++++++++sb.AppendFormat("Field:+{0},+Type:+{1},page:+{4},x:+{2},y:+{3}\n",+fld.Name,+fld.FieldType.ToString(),+fld.Rect.Left,+fld.Rect.Top,+"None");
++++++++++++}
++++++++++++if+(fld.FieldType+==+FieldType.Text)
++++++++++++{
++++++++++++++++fld.Value+=+fld.Name;
++++++++++++}

++++++++}

++++++++this.TextBox1.Text+=+sb.ToString();
++++++++this.TextBox1.Visible+=+true;
++++++++thedoc.Save(Server.MapPath(saveFile));
++++++++Response.Redirect(saveFile);
++++}|code-block|syntax|javascript|1349799|这做了两件事:+1)用所有表单域的清单填充文本框，显示它们的名称、字段类型、页码和在页面上的位置(顺便说一下，0，0是左下角)。2)使用输出文件中的字段名称填充所有文本字段-打印输出文件，所有文本字段都将被标记。|1349800|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I used the following code, using ABCpdf from WebSupergoo, but I imagine most libraries have comparable classes:

<pre><code>protected void Button1_Click(object sender, EventArgs e)
 {
 Doc thedoc = new Doc();
 string saveFile = "~/docs/f1_filled.pdf";
 System.Text.StringBuilder sb = new System.Text.StringBuilder();
 thedoc.Read(Server.MapPath("~/docs/F1_2010.pdf"));
 foreach (Field fld in thedoc.Form.Fields)
 {
 if (!(fld.Page == null))
 {
 sb.AppendFormat("Field: {0}, Type: {1},page: {4},x: {2},y: {3}\n", fld.Name, fld.FieldType.ToString(), fld.Rect.Left, fld.Rect.Top, fld.Page.PageNumber);
 }
 else
 {
 sb.AppendFormat("Field: {0}, Type: {1},page: {4},x: {2},y: {3}\n", fld.Name, fld.FieldType.ToString(), fld.Rect.Left, fld.Rect.Top, "None");
 }
 if (fld.FieldType == FieldType.Text)
 {
 fld.Value = fld.Name;
 }

 }

 this.TextBox1.Text = sb.ToString();
 this.TextBox1.Visible = true;
 thedoc.Save(Server.MapPath(saveFile));
 Response.Redirect(saveFile);
 }
</code></pre>

This does 2 things:
1) Populates a textbox with the inventory of all Form Fields, showing their name, fieldtype, and their page number and position on the page (0,0 is lower left, by the way).
2) Populates all the textfields with their field name in an output file - print the output file, and all of your text fields will be labelled.

blocks|key|1134562|text|我很晚才回复，虽然我的解决方案不是PHP，但我希望如果有人正在寻找Ruby的解决方案，它可能会派上用场。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1134563|首先是使用pdftk将所有字段name提取出来，然后我们需要清理转储文本，以获得良好的可读性哈希：|1134564|def+extract_fields(filename)
++field_output+=+`pdftk+#{filename}+dump_data_fields+2>&1`
++@fields+=+field_output.split(/%5E---\n/).map+do+%7Cfield_text%7C
++++if+field_text+=~+/%5EFieldName:+(\w%2B)$/
++++++$1
++++end
++end.compact.uniq
end|code-block|syntax|javascript|1134565|其次，现在我们可以使用任何XML解析来构造我们的XFDF：|1134566|#+code+borrowed+from+`nguyen`+gem+[https://github.com/joneslee85/nguyen]
#+generate+XFDF+content
def+to_xfdf(fields+=+{},+options+=+{})
++builder+=+Nokogiri::XML::Builder.new(:encoding+=>+'UTF-8')+do+%7Cxml%7C
++++xml.xfdf('xmlns'+=>+'http://ns.adobe.com/xfdf/',+'xml:space'+=>+'preserve')+{
++++++xml.f(:href+=>+options[:file])+if+options[:file]
++++++xml.ids(:original+=>+options[:id],+:modified+=>+options[:id])+if+options[:id]
++++++xml.fields+{
++++++++fields.each+do+%7Cfield,+value%7C
++++++++++xml.field(:name+=>+field)+{
++++++++++++if+value.is_a?+Array
++++++++++++++value.each+{+%7Citem%7C+xml.value(item.to_s)+}
++++++++++++else
++++++++++++++xml.value(value.to_s)
++++++++++++end
++++++++++}
++++++++end
++++++}
++++}
++end
++builder.to_xml
end

#+write+fdf+content+to+path
def+save_to(path)
++(File.open(path,+'w')+<<+to_xfdf).close
end|1134567|维奥拉，这是主要的逻辑。如果您正在寻找Ruby语言的轻量级库，我强烈建议您尝试一下nguyen+(https://github.com/joneslee85/nguyen)+gem。|offset|length|style|CODE|1134568|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/joneslee85/nguyen^0|0|0|0|0|0|15|6|1D|10|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|13|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|15|8|@$O|16|P|17|Q|R]]|9|@$O|18|P|19|1|1A]]|A|$]]|$1|S|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

A very late answer from me, though my solution is not PHP, but I hope it might come in handy should anyone is looking for a solution for Ruby.

First is to use pdftk to extract all fields name out then we need to cleanup the dump text, to have a good readable hash:

<pre><code>def extract_fields(filename)
 field_output = `pdftk #{filename} dump_data_fields 2&gt;&amp;1`
 @fields = field_output.split(/^---\n/).map do |field_text|
 if field_text =~ /^FieldName: (\w+)$/
 $1
 end
 end.compact.uniq
end
</code></pre>

Second, now we can use any XML parse to construct our XFDF:

<pre><code># code borrowed from `nguyen` gem [https://github.com/joneslee85/nguyen]
# generate XFDF content
def to_xfdf(fields = {}, options = {})
 builder = Nokogiri::XML::Builder.new(:encoding =&gt; 'UTF-8') do |xml|
 xml.xfdf('xmlns' =&gt; 'http://ns.adobe.com/xfdf/', 'xml:space' =&gt; 'preserve') {
 xml.f(:href =&gt; options[:file]) if options[:file]
 xml.ids(:original =&gt; options[:id], :modified =&gt; options[:id]) if options[:id]
 xml.fields {
 fields.each do |field, value|
 xml.field(:name =&gt; field) {
 if value.is_a? Array
 value.each { |item| xml.value(item.to_s) }
 else
 xml.value(value.to_s)
 end
 }
 end
 }
 }
 end
 builder.to_xml
end

# write fdf content to path
def save_to(path)
 (File.open(path, 'w') &lt;&lt; to_xfdf).close
end
</code></pre>

Viola, that's the main logic. I highly recommend you give <code>nguyen</code> (https://github.com/joneslee85/nguyen) gem a try if you are looking for a lightweight lib in Ruby.

blocks|key|1349985|text|C#+/+ITextSharp|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1349986|++++public+static+void+TracePdfFields(string+pdfFilePath)
++++{
++++++++PdfReader+pdfReader+=+new+PdfReader(pdfFilePath);
++++++++MemoryStream+pdfStream+=+new+MemoryStream();
++++++++PdfStamper+pdfStamper+=+new+PdfStamper(pdfReader,+pdfStream,+'\0',+true);

++++++++int+i+=+1;
++++++++foreach+(var+f+in+pdfStamper.AcroFields.Fields)
++++++++{
++++++++++++pdfStamper.AcroFields.SetField(f.Key,+string.Format("{0}+:+{1}",+i,+f.Key));
++++++++++++i%2B%2B;
++++++++++++//DoTrace("Field+=+[{0}]+%7C+Value+=+[{1}]",+f.Key,+f.Value.ToString());
++++++++}
++++++++pdfStamper.FormFlattening+=+false;
++++++++pdfStamper.Writer.CloseStream+=+false;
++++++++pdfStamper.Close();

++++++++FileStream+fs+=+File.OpenWrite(string.Format(@"{0}/{1}-TracePdfFields_{2}.pdf",+
++++++++++++ConfigManager.GetInstance().LogConfig.Dir,+
++++++++++++new+FileInfo(pdfFilePath).Name,+
++++++++++++DateTime.Now.Ticks));

++++++++fs.Write(pdfStream.ToArray(),+0,+(int)pdfStream.Length);
++++++++fs.Flush();
++++++++fs.Close();
++++}|code-block|syntax|javascript|1349987|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

C# / ITextSharp

<pre><code> public static void TracePdfFields(string pdfFilePath)
 {
 PdfReader pdfReader = new PdfReader(pdfFilePath);
 MemoryStream pdfStream = new MemoryStream();
 PdfStamper pdfStamper = new PdfStamper(pdfReader, pdfStream, '\0', true);

 int i = 1;
 foreach (var f in pdfStamper.AcroFields.Fields)
 {
 pdfStamper.AcroFields.SetField(f.Key, string.Format("{0} : {1}", i, f.Key));
 i++;
 //DoTrace("Field = [{0}] | Value = [{1}]", f.Key, f.Value.ToString());
 }
 pdfStamper.FormFlattening = false;
 pdfStamper.Writer.CloseStream = false;
 pdfStamper.Close();

 FileStream fs = File.OpenWrite(string.Format(@"{0}/{1}-TracePdfFields_{2}.pdf", 
 ConfigManager.GetInstance().LogConfig.Dir, 
 new FileInfo(pdfFilePath).Name, 
 DateTime.Now.Ticks));

 fs.Write(pdfStream.ToArray(), 0, (int)pdfStream.Length);
 fs.Flush();
 fs.Close();
 }
</code></pre>

I'm using pdftk to fill in a PDF form with an XFDF file. However, for this project I do not know in advance what fields will be present, so I need to analyse the PDF itself to see what fields need to be filled in, present an interface to the user accordingly, and then generate an XFDF file from that to fill in the PDF form. 

How do I get the field names? Preferably command-line, .NET or PHP solutions.

Extract PDF form field names from a PDF form

Ruby语言

JSON

我正在使用pdftk用XFDF文件填写PDF表单。但是，对于这个项目，我事先不知道会出现哪些字段，所以我需要分析PDF本身，看看需要填写哪些字段，相应地向用户呈现一个界面，然后从该界面生成一个XFDF文件来填充PDF表单。如何获取字段名称？最好是命令行、.NET或PHP解决方案。

问从PDF表单中提取PDF表单字段名称
EN

回答 7

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问从PDF表单中提取PDF表单字段名称EN

回答 7

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问从PDF表单中提取PDF表单字段名称
EN