Spring mvc Spring MVC-在web浏览器中显示PDF文件

我正在尝试使用SpringMVC在web浏览器中显示PDF文件

public void displayActiviteFiles (Activite activite, HttpServletResponse response) throws IOException {
    File file = new File(activite.getLienUploadUn());
    FileInputStream inputStream = new FileInputStream(file);
    IOUtils.copy(inputStream, response.getOutputStream());
    response.setHeader("Content-Disposition", "attachment; filename="+file.getName());
    response.setContentType("application/pdf");
    response.flushBuffer();
}

但我得到的是奇怪的字符，而不是pdf内容。

---

我错在哪里？

要回答我的问题并帮助其他人解决我的问题，可以这样做：

File file = new File(activite.getLienUploadUn());
FileInputStream inputStream = new FileInputStream(file);
byte[] buffer = new byte[8192];
ByteArrayOutputStream baos = new ByteArrayOutputStream();

int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1)
{
      baos.write(buffer, 0, bytesRead);
}
response.setHeader("Content-Disposition","inline; filename=\""+file.getName()+"\"");
response.setContentType("application/pdf");
ServletOutputStream outputStream = response.getOutputStream();
baos.writeTo(outputStream);
outputStream.flush();

---

如果这对任何人都很重要，那么这就是spring boot 1.5.11中的100%工作解决方案。还没有在手动Spring MVC项目上运行。也许通过一些小的调整，可以让它工作

    @GetMapping(value = "/downloadFile")
    public StreamingResponseBody getSteamingFile(HttpServletResponse response) throws URISyntaxException {

        File file = new File(getClass().getClassLoader().getResource("templates/more/si.pdf").toURI());

        //viewing in web browser
        response.setContentType("application/pdf");
        //for downloading the file directly if viewing is not possible
        response.setHeader("Content-Disposition", "inline; filename=" + file.getName());

        file = null;

        //put the directory architecture according to your target directory
        // generated during compilation in maven spring boot
        InputStream inputStream = getClass().getClassLoader().getResourceAsStream("templates/more/si.pdf");

        return outputStream -> {
            int nRead;
            byte[] data = new byte[1024];
            while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
                outputStream.write(data, 0, nRead);
            }
            inputStream.close();
        };
    }

---

您可以显示包含此代码的内容

@GetMapping(value = "/pdf")
public void showPdf(HttpServletResponse response) throws IOException {
    response.setContentType("application/pdf");
    InputStream inputStream = new FileInputStream(new File("/sample.pdf"));
    int nRead;
    while ((nRead = inputStream.read()) != -1) {
        response.getWriter().write(nRead);
    }
}