我在浏览器中正确显示PDF时出现问题。下面是我可以创建的最小的测试用例,它显示了问题。我正在使用Spring 3.0.5和PdfBox 1.6。
这是一个展示问题的简化控制器:
@RequestMapping(method = RequestMethod.GET, value = "generatePdf.pdf")
public ResponseEntity<byte []> generatePdf() throws IOException {
PDDocument document = null;
try {
document = new PDDocument();
PDPage page = new PDPage();
document.addPage(page);
PDFont font = PDType1Font.HELVETICA_BOLD;
PDPageContentStream contentStream = new PDPageContentStream(document, page);
contentStream.beginText();
contentStream.setFont(font, 12);
contentStream.moveTextPositionByAmount(100, 500);
contentStream.drawString("Hello World");
contentStream.endText();
contentStream.close();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
document.save(baos);
HttpHeaders headers = new HttpHeaders();
headers.setContentType(new MediaType("application", "pdf"));
headers.setContentLength(baos.toByteArray().length);
return new ResponseEntity<byte[]>(baos.toByteArray(), headers, HttpStatus.CREATED);
} catch (Exception e) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.TEXT_PLAIN);
return new ResponseEntity<byte[]>("BROKEN".getBytes(), headers, HttpStatus.CREATED);
} finally {
if (document != null) {
document.close();
}
}
}
以上适用于Chrome&amp; Firefox浏览器。但是,在IE中打开链接会导致无法显示任何内容。但是,如果我做了以下修改:
@RequestMapping(method = RequestMethod.GET, value = "generatePdf.pdf")
public ResponseEntity<byte []> generatePdf(HttpServletResponse response) throws IOException {
PDDocument document = null;
try {
document = new PDDocument();
//... Same until declaration of HttpHeaders
response.setHeader("Content-Type", "application/pdf");
response.setHeader("Content-Length", String.valueOf(baos.toByteArray().length));
FileCopyUtils.copy(baos.toByteArray(), response.getOutputStream());
return null;
} //... same as above
所有在IE以及其他浏览器中都能正常工作。我不太清楚我的选择是什么,其他类型的文件都写得正确(PNG,JPG等......)。
任何想法如何避免引入请求并简单地使用ResponseEntity来正确处理这些?
答案 0 :(得分:6)
我猜它来自HttpStatus.CREATED
。也许IE无法处理它。使用HttpStatus.OK
(200,这是标准的成功响应)。这似乎是两个片段之间的唯一区别
答案 1 :(得分:0)
您是否尝试过添加:
@RequestMapping(method = RequestMethod.GET, value = "generatePdf.pdf", produces =
MediaType.APPLICATION_OCTET_STREAM_VALUE){...}