随着无纸化办公的普及,电子文档的使用越来越广泛。电子签章作为一种有效的身份验证方式,在很多场景下替代了传统的纸质文件签名。Apache PDFBox 是一个开源的Java库,可以用来渲染、生成、填写PDF文档等操作。本文将介绍如何使用Spring Boot框架结合PDFBox来实现电子签章功能。
pom.xml
中添加PDFBox依赖。<dependency>
<groupId>org.apache.pdfbox</groupId>
<artifactId>pdfbox</artifactId>
<version>2.0.24</version>
</dependency>
public class Signature {
private int x;
private int y;
private int width;
private int height;
private String imagePath;
// Getters and Setters
}
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.common.PDRectangle;
import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
@Service
public class SignatureService {
public void addSignatureToPdf(String inputPdfPath, String outputPdfPath, Signature signature) throws IOException {
try (PDDocument document = PDDocument.load(new File(inputPdfPath))) {
PDPageContentStream contentStream = new PDPageContentStream(document, document.getPage(0));
PDImageXObject pdImage = PDImageXObject.createFromFile(signature.getImagePath(), document);
contentStream.drawImage(pdImage, signature.getX(), signature.getY(), signature.getWidth(), signature.getHeight());
contentStream.close();
document.save(outputPdfPath);
}
}
}
@RestController
@RequestMapping("/api/signature")
public class SignatureController {
@Autowired
private SignatureService signatureService;
@PostMapping("/add")
public ResponseEntity<String> addSignature(@RequestParam("inputPdf") MultipartFile inputPdf,
@RequestParam("image") MultipartFile image,
@RequestParam("x") int x,
@RequestParam("y") int y,
@RequestParam("width") int width,
@RequestParam("height") int height) throws IOException {
String tempInputPdfPath = "temp_input.pdf";
String tempOutputPdfPath = "temp_output.pdf";
String tempImagePath = "temp_image.png";
inputPdf.transferTo(new File(tempInputPdfPath));
image.transferTo(new File(tempImagePath));
Signature signature = new Signature();
signature.setX(x);
signature.setY(y);
signature.setWidth(width);
signature.setHeight(height);
signature.setImagePath(tempImagePath);
signatureService.addSignatureToPdf(tempInputPdfPath, tempOutputPdfPath, signature);
Files.copy(Paths.get(tempOutputPdfPath), Paths.get("path/to/your/static/folder/" + tempOutputPdfPath));
return ResponseEntity.ok().body("Signature added successfully!");
}
}
通过上述步骤,我们可以在Spring Boot项目中利用PDFBox实现基本的电子签章功能。这只是一个简单的示例,实际应用中可能还需要根据具体需求做进一步的扩展和优化。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。
原创声明:本文系作者授权腾讯云开发者社区发表,未经许可,不得转载。
如有侵权,请联系 cloudcommunity@tencent.com 删除。