Question

我已经存在pdf模板

现在我想在这个文件中添加一些文字，所以我这样做了：

 PdfReader reader = new PdfReader(path + PdfCreator.TEMPORARY);
 PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(path + PdfCreator.DEST));
 PdfContentByte canvasBookingDate = stamper.getOverContent(1);
 //add text "Hellow"
 canvasBookingDate.setFontAndSize(base, 9.5f);   
 canvasBookingDate.moveText(72f, 788f);
 canvasBookingDate.showText("Hello");
 canvasBookingDate.moveText(72f, 762f);
 //add text "How are you"
 canvasBookingDate.setFontAndSize(base, 9.5f);   
 canvasBookingDate.showText("How are you");
 canvasBookingDate.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE);

问题是，只有＆＃34;你好＆＃34;被插入pdf文件，＆＃34;你好吗＆＃34;不是也许我错在那里？

我还使用单独的PdfContentByte对象来编写每个文本但没有运气

PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(path + PdfCreator.DEST));
 PdfContentByte canvasBookingDate = stamper.getOverContent(1);
 //add text "Hellow"
 canvasBookingDate.setFontAndSize(base, 9.5f);   
 canvasBookingDate.moveText(72f, 788f);
 canvasBookingDate.showText("Hello");
 canvasBookingDate.moveText(72f, 762f);

 //add text "How are you"
 PdfContentByte canvasPlanName2 = stamper.getOverContent(1);
 canvasPlanName2.setFontAndSize(base, 9.5f);   
 canvasPlanName2.moveText(72f, 762f);
 canvasPlanName2.showText(entity.getPlanName());
 canvasPlanName2.setTextRenderingMode(PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE);

Answer 1

问题是，只有＆＃34;你好＆＃34;被插入pdf文件，＆＃34;你好吗＆＃34;不是

你的观察结果不准确：＆＃34;你好吗＆＃34;插入，只是远离页面！（从adobe reader执行CtrlA CtrlC并粘贴到某个编辑器中，你会看到它存在于某个地方。）

原因是你误解了moveText的工作原理。看看它的JavaDoc文档：

/**
 * Moves to the start of the next line, offset from the start of the current line.
 *
 * @param       x           x-coordinate of the new current point
 * @param       y           y-coordinate of the new current point
 */
public void moveText(final float x, final float y)

因此，坐标是相对的，而不是绝对的！

所以你应该做

canvasBookingDate.beginText();
canvasBookingDate.setFontAndSize(base, 9.5f);   
canvasBookingDate.moveText(72f, 788f);
canvasBookingDate.showText("Hello");
canvasBookingDate.moveText(0f, -16f);
//add text "How are you"
canvasBookingDate.showText("How are you");
canvasBookingDate.endText();

Answer 2

我从Vishal Kawade链接找到答案在每个文本之后只需使用beginText()和endText()，就需要插入pdf

使用itext将多文本添加到现有pdf

2 个答案: