java 修改多页面 pdf 中的值
时间: 2024-02-21 10:01:55 浏览: 20
要在Java中修改多页PDF文件中的值,您可以使用Apache PDFBox库中的PDPageContentStream类和PDPage类。以下是一个示例代码,它将在PDF文件的所有页面中替换特定文本:
```java
import java.io.File;
import java.io.IOException;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.edit.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
import org.apache.pdfbox.text.PDFTextStripper;
import org.apache.pdfbox.text.PDFTextStripperByArea;
public class ModifyPDF {
public static void main(String[] args) throws IOException {
// Load the PDF document
File file = new File("original.pdf");
PDDocument document = PDDocument.load(file);
// Get the total number of pages in the document
int pageCount = document.getNumberOfPages();
// Define the text to be replaced and the new text
String oldText = "Old Text";
String newText = "New Text";
// Iterate through each page of the document
for (int i = 0; i < pageCount; i++) {
PDPage page = document.getPage(i);
// Create a new content stream to add text
PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.APPEND, true, true);
// Define the font and font size
contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12);
// Define the position where the text will be added
int x = 100;
int y = 700;
// Replace the old text with the new text
PDFTextStripperByArea stripper = new PDFTextStripperByArea();
stripper.setSortByPosition(true);
stripper.addRegion("searchRegion", page.getMediaBox());
stripper.extractRegions(page);
for (String text : stripper.getTextForRegion("searchRegion").split(oldText)) {
contentStream.beginText();
contentStream.newLineAtOffset(x, y);
contentStream.showText(text);
contentStream.endText();
x += PDType1Font.HELVETICA_BOLD.getStringWidth(text) / 1000 * 12;
contentStream.beginText();
contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12);
contentStream.newLineAtOffset(x, y);
contentStream.showText(newText);
contentStream.endText();
x += PDType1Font.HELVETICA_BOLD.getStringWidth(newText) / 1000 * 12;
}
// Close the content stream
contentStream.close();
}
// Save the modified document
document.save("modified.pdf");
// Close the document
document.close();
}
}
```
该示例代码将在PDF文件的所有页面中查找名为"Old Text"的文本,并将其替换为"New Text"。请注意,在此示例中,我们使用PDFTextStripperByArea类来查找文本,并使用PDType1Font类来设置字体和字体大小。您可以根据您的需要修改此示例代码以在多页PDF文件中修改其他文本或属性。