我在我的java类中有以下代码部分。getOutputStream()已被调用此响应,同时从java导出为pdf文件
if(exportTo.equals("pdf"))
{
response.setHeader("Content-disposition", "attachment; filename=\"" + reportName + ".pdf\"");
response.setContentType("application/pdf");
PdfWriter.getInstance(document,response.getOutputStream());
try {
document.open();
addTitlePage(document, reportName);
Image image = Image.getInstance(path+"/"+"images/abi.png");
image.setAbsolutePosition(40f, 770f);
image.scaleAbsolute(70f, 50f);
document.add(image);
response.flushBuffer();
//float[] colsWidth = {1.5f,3f,4f,4f,2f};
List<Float> colsWidth = new ArrayList<Float>();
int iterator = 1;
while (iterator <= headerMap.size()) {
if(iterator==1){
colsWidth.add(1.5f);
}else{
colsWidth.add(3f);
}
iterator++;
}
float[] floatArray = ArrayUtils.toPrimitive(colsWidth.toArray(new Float[0]), 0.0F);
PdfPTable table = new PdfPTable(floatArray);
table.setWidthPercentage(98);
table.setHorizontalAlignment(Element.ALIGN_CENTER);
PdfPCell c1 = new PdfPCell();
for (Iterator it = headerMap.keySet().iterator(); it.hasNext();) {
String headerName = (String) headerMap.get(it.next());
c1 = new PdfPCell(new Phrase(headerName, headerFont));
c1.setBackgroundColor(BaseColor.LIGHT_GRAY);
table.addCell(c1);
}
table.setHeaderRows(1);
table = custDAO.creadPDFTable(query, table);
document.add(table);
document.addAuthor(userViewModel.getUsername());
document.addCreationDate();
document.addCreator("POC");
document.close();
response.flushBuffer();
} catch (Exception ex) {
ex.printStackTrace();
}
}
当我从代码中删除以下行我没有得到任何异常,但是当我包括这行,我得到java.lang.IllegalStateException: getOutputStream() has already been called for this response
例外。
Image image = Image.getInstance(path+"/"+"images/abi.png");
image.setAbsolutePosition(40f, 770f);
image.scaleAbsolute(70f, 50f);
document.add(image);
response.flushBuffer();
我用上面的代码将图像添加到PDF文件(itextpdflibrary
)
,这可能是解决这一点,请告诉我,我一直面临着这个很长一段时间。
问候。
如果你删除第一个'response.flushBuffer();'? – 2012-09-21 00:33:25
我得到同样的异常 –
哪一行?你可以给堆栈跟踪吗? – 2012-09-21 00:38:50