我的申请中有pdf文件。我需要在浏览器中显示pdf。我正在将文件作为fileInputStream读取,我需要在浏览器中与我的应用程序一起显示pdf。但我没有pdf路径,我有文件流。
请给我一些建议和例子
我已经使用ajax显示pdf,正在使用call_method()javascript ajax请求方法来调用showPdf操作,在showpdf操作中,只是将pdf文件转换为ByteArrayOutputStream并将结果写入输出流中。但是它显示了下面提到的结果。
结果在JSP中 :
%PDF-1.4% 1 endstream endobj 4 0 obj <>>> / MediaBox [0 0 595 842] >> endobj 1 0 obj <> endobj 3 0 obj <> endobj 5 0 obj <> endobj 6 0 obj <> endobj xref 0 7 0000000000 65535 f 0000000389 00000 n 0000000015 00000 n 0000000477 00000 n 0000000232 00000 n 0000000540 00000 n 0000000585 00000 n拖车<< 142354f5ebefd65d6aacd33a7cb2b4ab>] / Info 6 0 R / Size 7 >> startxref 707 %% EOF
请给一些建议。
Javascript Ajax:
call_method(); <br/> function call_method(){ Ext.Ajax.request({ waitMsg: 'Saving changes...', url:'test.action?method=showPdf', params : { }, failure:function(response,options){ }, success:function(response,options){ $("#pdf_content").show(); $("#pdf_content").html(response.responseText); $("#pdf_content").show('slow'); } }); }
Java方法:
public String showPdf() throws IOException { getResponse().setContentType("application/pdf"); getResponse().setHeader("Content-disposition","inline; filename=automatic_start.pdf" ); ByteArrayOutputStream baos = getByteArrayOutputStream(); getResponse().setContentLength(baos.size()); ServletOutputStream sos; sos = getResponse().getOutputStream(); baos.writeTo(sos); sos.flush(); return null; } private ByteArrayOutputStream getByteArrayOutputStream() throws IOException { String filePath = "/homefolder/"; String folderPath=filePath+"1122/automatic_start.pdf"; File file = new File(folderPath); FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream bos = new ByteArrayOutputStream(); byte[] buf = new byte[256]; try { for (int readNum; (readNum = fis.read(buf)) != -1;) { bos.write(buf, 0, readNum); //no doubt here is 0 //Writes len bytes from the specified byte array starting at offset off to this byte array output stream. System.out.println("read " + readNum + " bytes,"); } } catch (IOException ex) { ex.printStackTrace(); } return bos; }
在您的servlet中,将MIME类型设置为适用于PDF的正确类型: application/pdf
application/pdf
参见http://www.iana.org/assignments/media- types/