试图使用iText7合并来合并pdf，但是当我打开最终的合并pdf时，它说无法加载pdf文档

问题描述 投票：0回答：1

我正在使用itext7 PdfWriter创建两个ByteArrayOutputStream，然后使用merge将它们合并到一个pdf中，但是当我尝试打开最终的合并pdf时说加载失败。@GetMapping(value = "/customers",

produces = MediaType.APPLICATION_PDF_VALUE)

public ResponseEntity customersReport() throws IOException {

ByteArrayOutputStream out = new ByteArrayOutputStream();

PdfDocument pdf = new PdfDocument(new PdfWriter(out));

Document document = new Document(pdf);

Paragraph p = new Paragraph("AAAAAAAAA");

document.add(p);

document.close();

ByteArrayOutputStream out1 = new ByteArrayOutputStream();

PdfDocument pdf1 = new PdfDocument(new PdfWriter(out1));

Document document1 = new Document(pdf1);

Paragraph p1 = new Paragraph("123456A");

document1.add(p1);

document1.close();

ByteArrayOutputStream outfinal = new ByteArrayOutputStream();

PdfDocument pdfDoc = new PdfDocument(new PdfWriter(outfinal));

PdfMerger merger = new PdfMerger(pdfDoc);

PdfDocument pdf2 = new PdfDocument(new PdfReader(new ByteArrayInputStream(out.toByteArray())));

merger.merge(pdf2,1,pdf2.getNumberOfPages());

PdfDocument pdf3 = new PdfDocument(new PdfReader(new ByteArrayInputStream(out1.toByteArray())));

merger.merge(pdf3,1,pdf3.getNumberOfPages());

ByteArrayInputStream bis = new ByteArrayInputStream(outfinal.toByteArray());

HttpHeaders headers = new HttpHeaders();

headers.add("Content-Disposition", "inline; filename=customers.pdf");

return ResponseEntity

.ok()

.headers(headers)

.contentType(MediaType.APPLICATION_PDF)

.body(new InputStreamResource(bis));

}

java

spring

spring-boot

pdf

itext7

1个回答

1

投票

您必须关闭合并merger.close();

在使用其输出之前ByteArrayInputStream bis = new ByteArrayInputStream(outfinal.toByteArray());

因为仅在关闭pdf文件时完成。

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