Question

我在下面提供了宁静的网络服务代码。但是当访问web服务时，我得到“找不到MIME媒体类型application / pdf”。 docService.findByVersionId确实返回一个“TestDoc”，它将pdf内容保存为byte []。

你能帮我解决这个问题吗？

@GET
    @Path("/getPdf/{versionId}")
    @Produces("application/pdf")
    public Response getPdfFile(@PathParam("versionId") final String versionId) {
        try {
            final TestDoc doc = this.docService.findByVersionId(versionId);
            final ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            final BufferedOutputStream bos = new BufferedOutputStream(byteArrayOutputStream);
            final byte[] pdfContent = doc.getPdfDoc();
            bos.write(pdfContent);
            bos.flush();
            bos.close();
            return Response.ok(byteArrayOutputStream).build();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }

    }

错误：

 Exception:
 2014-01-02 12:42:07,497 ERROR [STDERR] 02-Jan-2014 12:42:07  com.sun.jersey.spi.container.ContainerResponse write
 SEVERE: A message body writer for Java class java.io.ByteArrayOutputStream, and Java type class java.io.ByteArrayOutputStream, and MIME media type application/pdf was not found

Answer 1

您似乎无法使用ByteArrayOutputStream。解决方案是使用StreamingOutput。

@GET
public Response generatePDF(String content) {
    try {
        ByteArrayOutputStream outputStream = service.generatePDF(content);
        StreamingOutput streamingOutput = getStreamingOutput(outputStream);

        Response.ResponseBuilder responseBuilder = Response.ok(streamingOutput, "application/pdf");
        responseBuilder.header("Content-Disposition", "attachment; filename=Filename.pdf");
        return responseBuilder.build();
    } catch (IOException e) {
        log.log(Level.SEVERE, e.getMessage(), e);
        return Response.serverError().build();
    }
}



private StreamingOutput getStreamingOutput(final ByteArrayOutputStream byteArrayOutputStream) {
    return new StreamingOutput() {
        public void write(OutputStream output) throws IOException, WebApplicationException {
            byteArrayOutputStream.writeTo(output);
        }
    };
}

在restful webservice中找不到IME媒体类型application / pdf

1 个答案: