如何使用IText在PDF的页面中间插入内容 [英] How to insert content in the middle of a page in a PDF using IText
问题描述
我需要以PDF格式将内容插入页面中间。
I have a requirement to insert Content into the middle of the page in a PDF.
内容可以是动态表格或图像。
The Content may be a Dynamic Table or an Image.
我的概念是首先将PDF分成两部分，然后通过替换占位符字段来获取要添加和追加的新内容。
My Concept was to first split the PDF into 2 parts, then get the new Content that is to be added and append by replacing a place holder field.
根据IText，Splitting称为Tiling，这是一个相同的示例。
http://itextpdf.com/examples/iia.php?id=116
the Splitting is called Tiling as per IText and here is an example for the same. http://itextpdf.com/examples/iia.php?id=116
上面的代码有两个缺点：$ b $ b 1.它将页面拆分为16个部分。但这是示例的一部分。我仍然无法找到一种方法将文件分成两部分。
2.其次，拆分页面将转换为完整页面，从而扰乱其比例。
The Code above has 2 drawbacks: 1. It splits the page into 16 parts. but that is part of the example. Still i cant figure out a way to split the file into 2 parts only. 2. secondly the split page is converted to a complete page thus disturbing its proportions.
重新排列代码是另一个问题。
The Rearranging code is the another problem.
剩余的内容应该在追加模式下重新排序。但直到我找到代码才能添加完整的新页面而不仅仅是内容。
The remaining Content should be re-ordered in append mode. but till yet i have only found codes to add complete new pages rather than just the content.
我找到了一个代码，通过替换占位符来附加PDF内容： / p>
I have found a code that appends the PDF content by replacing a placeholder:
float[] fieldPosition= pdfTemplate.getAcroFields().getFieldPositions("tableField");
PdfPTable table = buildTable();
PdfContentByte cb = stamper.getOverContent(1);
table.writeSelectedRows(0, -1, fieldPosition[1],fieldPosition[4],cb);
请帮我解决此要求。
Please help me to solve this requirement.
推荐答案
PDF是一种表示格式，而不是一种编辑格式。换句话说，它不是为了允许内容插入而设计的，原始内容优雅地回流。因此，没有工具（至少，我所知道的，肯定不是iText）将使您能够实现您的要求。
PDF is a presentation format, not an edition format. In other words, it is not designed to allow content insertion, with the original content reflowing gracefully. As a consequence, no tool (at least, none that I know of, and surely not iText) will enable you to achieve what you were given as a requirement.
My建议：
- 拒绝分配，因为它不可行，或者
- 抓住原来的文档，插入所需的额外内容，然后转换为PDF。
- refuse the assignment since it's not feasible, or
- get your hands on the original document, insert the desired extra content, and then convert to PDF.
这篇关于如何使用IText在PDF的页面中间插入内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
