我正在使用com.itextpdf.text.*以下生成pdf文件是我的代码，它创建带有突出显示的标题和标题和行的pdf文件，我想要做的是，创建一个顶部带有图像的pdf文件和带有备用颜色的行，如何做到这一点使用com.itextpdf.text.*
response.setHeader("Content-disposition", "attachment; filename=\"" + reportName + ".pdf\"");
response.setContentType("application/pdf");
PdfWriter.getInstance(document,response.getOutputStream());
try {
document.open();
addTitlePage(document, reportName);
//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();
public PdfPTable creadPDFTable(String query,PdfPTable table){
int numberOfColumns=0,sno=1;
Connection connection = getConnection();
if (connection != null) {
try {
PreparedStatement reportTablePS = connection.prepareStatement(query);
ResultSet reportTable_rst = reportTablePS.executeQuery();
ResultSetMetaData reportTable_rsmd = reportTable_rst.getMetaData();
numberOfColumns = reportTable_rsmd.getColumnCount();
while (reportTable_rst.next()) {
table.addCell(new PdfPCell(new Paragraph(String.valueOf(sno), textFont)));
for (int columnIterator = 1; columnIterator <= numberOfColumns; columnIterator++) {
String column = reportTable_rst.getString(columnIterator);
table.addCell(new PdfPCell(new Paragraph(column, textFont)));
}
sno++;
}
} catch (Exception ex) {
ex.printStackTrace();
}finally {
try {
closeConnection(connection, null, null);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
return table;
}
private static void addTitlePage(Document document, String reportName) throws DocumentException {
Paragraph preface = new Paragraph();
addEmptyLine(preface, 1);
/**
* Lets write a big header
*/
Paragraph paragraph = new Paragraph(reportName, titleFont);
paragraph.setAlignment(Element.ALIGN_CENTER);
document.add(paragraph);
/**
* Add one empty line
*/
addEmptyLine(preface, 1);
document.add(preface);
}
private static void addEmptyLine(Paragraph paragraph, int number) {
for (int i = 0; i < number; i++) {
paragraph.add(new Paragraph(" "));
}
}
当我使用以下内容时，我得到以下异常'getoutputstream（）已经调用了这个响应'
我想用它来插入图像。
Image image = Image.getInstance(path+"images/abi.png");
image.setAbsolutePosition(40f, 770f);
image.scaleAbsolute(70f, 50f);
document.add(image);
那么如何去做呢？
更新 ：
我想创建一个像这样的 pdf 文件我只想在顶部添加图像和像这样使用交替颜色的行。
