我正在尝试从FTP服务器中的特定位置检索多个pdf / tiff文件，加入它们并将它们发送到要显示的jsp页面。到目前为止，这就是我所做的。
在动作类中， a）我尝试在名为pdfbean的bean中检索文件详细信息， b）将pdfbean传递给一个进行ftp连接并从服务器检索文件的方法 c）将其转换为byte []并将其返回以添加到文档中。
现在这个文档存储在C：\中，这不是我想要的。我想将它发送到jsp页面。截至目前，我不知道如何发送它。
ArrayList<PdfBean> list = msgDH.getFileDtls(hawbString);
Document doc = new Document();
PdfWriter write = PdfWriter.getInstance(doc,
new FileOutputStream("c://Image.pdf"));
write.setPdfVersion(PdfWriter.PDF_VERSION_1_5);
doc.open();
for (PdfBean pdfBean : list)
{
byte[] Image2 = getfile(pdfBean);
Image img = Image.getInstance(Image2);
doc.add(img);
doc.newPage();
}
doc.close();
System.out.println("Done saving");
下面是getfile（）方法
private byte[] getfile(PdfBean pdfBean)
{
byte[] result = null;
boolean test = false;
FTPClient ftp = new FTPClient();
DataSourceReader dsr = new DataSourceReader();
dsr.getFtpLinks();
String ftppassword = dsr.getFtppassword();
String ftpserver = dsr.getFtpserver();
String ftpusername = dsr.getFtpusername();
System.out.println("no" + ftpserver + ftpusername + ftppassword);
try
{
ftp.connect(ftpserver);
} catch (SocketException e1)
{
e1.printStackTrace();
} catch (IOException e1)
{
e1.printStackTrace();
}
InputStream is = null;
BufferedInputStream bis = null;
try
{
boolean login = ftp.login(ftpusername, ftppassword);
} catch (IOException e1)
{
e1.printStackTrace();
}
try
{
int reply;
reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply))
{
ftp.disconnect();
System.out.println("FTP server refused connection.");
} else
{
ftp.enterLocalPassiveMode();
FTPFile[] ftpFiles = ftp.listFiles(pdfBean.getFileLocation());
String fN = "";
int i = 0;
//tiff and pdf files reside in different folders.
if (pdfBean.getFileLocation().equals("/hold/TIF"))
{
String F = pdfBean.getFileName().replaceAll(".PDF", ".TIF");
for (FTPFile ftpFile : ftpFiles)
{
if (ftpFile.getName().equals(F))
{
fN = pdfBean.getFileLocation().concat("/")
.concat(F);
i = 1;
}
}
if (i == 0)
{
F = pdfBean.getFileName().replaceAll(".PDF", ".TIFF");
for (FTPFile ftpFile : ftpFiles)
{
if (ftpFile.getName().equals(F))
{
fN = pdfBean.getFileLocation().concat("/")
.concat(F);
i = 1;
}
}
}
} else
{
fN = pdfBean.getFileLocation().concat("/")
.concat(pdfBean.getFileName());
}
InputStream in = ftp.retrieveFileStream(fN);
BufferedInputStream inbf = new BufferedInputStream(in);
byte[] buffer = IOUtils.toByteArray(in);// new byte[1024];
result = buffer;
/*
* int readCount;
*
* int lenght = 0;
*
* while( (readCount = inbf.read(buffer)) > 0) { int preLength =
* lenght; lenght += readCount; byte temp[] = new
* byte[result.length]; result = new byte[lenght];
* System.arraycopy(temp,0,result,0,temp.length);
* System.arraycopy(buffer,0,result,preLength,readCount); }
*/
}
} catch (Exception ex)
{
System.out.println("Exception ----->" + ex.getMessage());
} finally
{
try
{
if (bis != null)
{
bis.close();
}
if (is != null)
{
is.close();
}
} catch (IOException e)
{
e.printStackTrace();
}
try
{
ftp.logout();
} catch (IOException e)
{
e.printStackTrace();
}
try
{
ftp.disconnect();
} catch (IOException e)
{
e.printStackTrace();
}
}
return result;
}
我得到一个java.lang.NegativeArraySizeException我哪里错了。您是否预见到将tif和pdf作为图像添加到同一文档时会出现任何问题。最后，一旦我准备好文件，我该如何将其发送到JSP页面？
答案 0 :(得分：0)
for (PdfBean pdfBean : list)
{
if(!pdfBean.getFileName().isEmpty()&&!pdfBean.getFileLocation().isEmpty()){
msgDH.InsertUserHistDtls(pdfBean.getHawb(), userId, pdfBean.getCustomer(), pdfBean.getFileName(), pdfBean.getProduct(), pdfBean.getDocType(), "Print");
msgDH.InsertLogDtls(pdfBean.getFileName(), pdfBean.getProduct(), pdfBean.getCustomer(), userId);
FTPClient ftp = new FTPClient();
int tiffPages = 0;
try
{
ftp.connect(ftpserver);
} catch (SocketException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
try
{
boolean login = ftp.login(ftpusername, ftppassword);
} catch (IOException e1)
{
// TODO Auto-generated catch block
e1.printStackTrace();
}
int reply;
reply = ftp.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply))
{
ftp.disconnect();
System.out.println("FTP server refused connection.");
} else
{
// ftp.enterLocalPassiveMode();
ftp.enterLocalActiveMode();
ftp.setFileType(FTPClient.BINARY_FILE_TYPE);
ftp.changeWorkingDirectory(pdfBean.getFileLocation());
/* FTPFile[] */
ftpFiles = ftp.listFiles();
/* FTPFile[] */// ftpFiles = ftp.listFiles();
// ftp.completePendingCommand();
}
String fileName = pdfBean.getFileLocation() + "/"
+ pdfBean.getFileName();
if ("/interface/oracle/dds/generic/hold/TIF"
.equalsIgnoreCase(pdfBean.getFileLocation()))
{
int i = 0;
String F = pdfBean.getFileName().replaceAll(".PDF",
".TIF");
// FTPFile[] ftpFiles =
// ftp.listFiles(pdfBean.getFileLocation());
for (FTPFile ftpFile : ftpFiles)
{
if (ftpFile.getName().equals(F))
{
fileName = pdfBean.getFileLocation()
.concat("/").concat(F);
i = 1;
}
}
if (i == 0)
{
F = pdfBean.getFileName().replaceAll(".PDF",
".TIFF");
for (FTPFile ftpFile : ftpFiles)
{
if (ftpFile.getName().equals(F))
{
fileName = pdfBean.getFileLocation()
.concat("/").concat(F);
i = 1;
}
}
}
int Repcode = ftp.getReplyCode();
//
// System.out.println(Repcode);
/* if(fileName.endsWith(".TIF")) */
InputStream is = (InputStream) ftp.retrieveFileStream(fileName);
Repcode = ftp.getReplyCode();
System.out.println(Repcode);
// ftp.completePendingCommand();
Repcode = ftp.getReplyCode();
System.out.println(Repcode);
ra1 = new RandomAccessFileOrArray(is);
tiffPages = TiffImage.getNumberOfPages(ra1);
System.out.println("No of pages in image is : "
+ tiffPages);
for (int a = 1; a <= tiffPages; a++)
{
try
{
Image img = TiffImage.getTiffImage(ra1, a);
if (img != null)
{
if (img.getScaledWidth() > 500
|| img.getScaledHeight() > 700)
{
img.scaleToFit(800, 800);
}
doc.setPageSize(new Rectangle(img
.getScaledWidth(), img
.getScaledHeight()));
img.setAbsolutePosition(0, 0);
cb.addImage(img);
// doc.
doc.newPage();
// ++pages;
}
} catch (Throwable e)
{
System.out.println("Exception " + " page "
+ (a + 1) + " " + e.getMessage());
}
}
is.close();
ra1.close();
}
else{
InputStream pdf = ftp.retrieveFileStream(fileName);
if(pdf != null) {
PdfReader pdfRea = new PdfReader(pdf);
readers.add(pdfRea);
totalPages += pdfRea.getNumberOfPages();
}
/*totalPages += pdfRea.getNumberOfPages();
PdfImportedPage page;
int currentPageNumber = 0;
int pageOfCurrentReaderPDF = 0;
Iterator<PdfReader> iteratorPDFReader = readers.iterator();
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,
BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
// Loop through the PDF files and add to the output.
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader = iteratorPDFReader.next();
// Create a new page in the target for each source page.
while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
doc.newPage();
pageOfCurrentReaderPDF++;
currentPageNumber++;
page = write.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
cb.addTemplate(page, 0, 0);
// Code for pagination.
cb.beginText();
cb.setFontAndSize(bf, 9);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, ""
+ currentPageNumber + " of " + totalPages, 520, 5, 0);
cb.endText();
}
pageOfCurrentReaderPDF = 0;
}*/
}
ftp.logout();
ftp.disconnect();
ftp = null;
}}
PdfImportedPage page;
int currentPageNumber = 0;
int pageOfCurrentReaderPDF = 0;
Iterator<PdfReader> iteratorPDFReader = readers.iterator();
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,
BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
// Loop through the PDF files and add to the output.
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader = iteratorPDFReader.next();
// Create a new page in the target for each source page.
while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
doc.newPage();
pageOfCurrentReaderPDF++;
currentPageNumber++;
page = write.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
cb.addTemplate(page, 0, 0);
// Code for pagination.
cb.beginText();
cb.setFontAndSize(bf, 9);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, ""
+ currentPageNumber + " of " + totalPages, 520, 5, 0);
cb.endText();
}
pageOfCurrentReaderPDF = 0;
}
}
doc.close();
write.flush();
write.close();
System.out.println("done printing");
}
FileInputStream fiss = new FileInputStream(temp);
bis = new BufferedInputStream(fiss);
response.reset();