最好是写一个装饰，并将其添加为
<display:setProperty name="decorator.media.pdf" value="org.displaytag.sample.decorators.ItextTotalWrapper"/
但你可以有自己的出口类。
例如， 创建一个包decorators在这个包中创建一个类myPdfExportView.java和复制粘贴下面的代码。
package decorators;
import java.awt.Color;
import com.lowagie.text.Font;
import com.lowagie.text.Rectangle;
import java.io.OutputStream;
import java.util.Iterator;
import javax.servlet.jsp.JspException;
import org.apache.commons.lang.ObjectUtils;
import org.displaytag.Messages;
import org.displaytag.exception.BaseNestableJspTagException;
import org.displaytag.exception.SeverityEnum;
import org.displaytag.export.BinaryExportView;
import com.lowagie.text.Cell;
import org.displaytag.model.Column;
import org.displaytag.model.ColumnIterator;
import org.displaytag.model.HeaderCell;
import org.displaytag.model.Row;
import org.displaytag.model.RowIterator;
import org.displaytag.model.TableModel;
import org.apache.commons.lang.StringUtils;
import com.lowagie.text.BadElementException;
import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.Element;
import com.lowagie.text.FontFactory;
import com.lowagie.text.HeaderFooter;
import com.lowagie.text.PageSize;
import com.lowagie.text.Phrase;
import com.lowagie.text.Table;
import com.lowagie.text.pdf.PdfWriter;
public class myPdfExportView implements BinaryExportView
{
private TableModel model;
private boolean exportFull;
private boolean header;
private boolean decorated;
private Table tablePDF;
private Font smallFont;
private Font headerFont;
public void setParameters(TableModel tableModel, boolean exportFullList, boolean includeHeader,
boolean decorateValues)
{
this.model = tableModel;
this.exportFull = true;
this.header = includeHeader;
this.decorated = decorateValues;
}
protected void initTable() throws BadElementException
{
tablePDF = new Table(this.model.getNumberOfColumns());
//tablePDF.getDefaultCell().setVerticalAlignment(Element.ALIGN_TOP);
tablePDF.setCellsFitPage(true);
tablePDF.setWidth(100);
tablePDF.setPadding(2);
tablePDF.setSpacing(0);
smallFont = FontFactory.getFont(FontFactory.HELVETICA, 7, Font.NORMAL, new Color(0,0,0));
headerFont = FontFactory.getFont(FontFactory.HELVETICA, 14, Font.BOLD, new Color(192, 20, 25));
}
public String getMimeType()
{
return "application/pdf"; //$NON-NLS-1$
}
protected void generatePDFTable() throws JspException, BadElementException
{
if (this.header)
{
generateHeaders();
}
tablePDF.endHeaders();
generateRows();
}
public void doExport(OutputStream out) throws JspException
{
try
{
// Initialize the table with the appropriate number of columns
initTable();
// Initialize the Document and register it with PdfWriter listener and the OutputStream
Document document = new Document(PageSize.A4.rotate(), 60, 60, 40, 40);
document.addCreationDate();
HeaderFooter header = new HeaderFooter(new Phrase(this.model.getCaption(), headerFont), false);
header.setBorder(Rectangle.NO_BORDER);
header.setAlignment(Element.ALIGN_CENTER);
HeaderFooter footer = new HeaderFooter(new Phrase("Page No - " + document.getPageNumber() , smallFont), true);
footer.setBorder(Rectangle.NO_BORDER);
footer.setAlignment(Element.ALIGN_CENTER);
//footer.setBackgroundColor(new Color(206, 204, 207));
PdfWriter.getInstance(document, out);
// Fill the virtual PDF table with the necessary data
generatePDFTable();
document.setHeader(header);
document.setFooter(footer);
document.open();
document.add(this.tablePDF);
document.close();
}
catch (Exception e)
{
throw new PdfGenerationException(e);
}
}
protected void generateHeaders() throws BadElementException
{
Iterator<HeaderCell> iterator = this.model.getHeaderCellList().iterator();
while (iterator.hasNext())
{
HeaderCell headerCell = iterator.next();
String columnHeader = headerCell.getTitle();
if (columnHeader == null)
{
columnHeader = StringUtils.capitalize(headerCell.getBeanPropertyName());
}
Cell hdrCell = getCell(columnHeader);
hdrCell.setGrayFill(0.9f);
hdrCell.setHeader(true);
tablePDF.addCell(hdrCell);
}
}
protected void generateRows() throws JspException, BadElementException
{
// get the correct iterator (full or partial list according to the exportFull field)
RowIterator rowIterator = this.model.getRowIterator(this.exportFull);
// iterator on rows
while (rowIterator.hasNext())
{
Row row = rowIterator.next();
// iterator on columns
ColumnIterator columnIterator = row.getColumnIterator(this.model.getHeaderCellList());
while (columnIterator.hasNext())
{
Column column = columnIterator.nextColumn();
// Get the value to be displayed for the column
Object value = column.getValue(this.decorated);
Cell cell = getCell(ObjectUtils.toString(value));
tablePDF.addCell(cell);
}
}
Object value = this.model.getFooter().trim();
Cell cell = getCell(ObjectUtils.toString(value).replace("\t",""));
//cell.setBackgroundColor(new Color(206, 204, 207));
cell.setGrayFill(0.9f);
cell.setColspan(this.model.getHeaderCellList().size());
cell.setVerticalAlignment(Element.ALIGN_TOP);
cell.setHorizontalAlignment(Element.ALIGN_LEFT);
cell.setLeading(8);
tablePDF.addCell(cell);
}
private Cell getCell(String value) throws BadElementException
{
Cell cell = new Cell(new Chunk(StringUtils.trimToEmpty(value), smallFont));
cell.setVerticalAlignment(Element.ALIGN_TOP);
cell.setLeading(8);
return cell;
}
static class PdfGenerationException extends BaseNestableJspTagException
{
private static final long serialVersionUID = 899149338534L;
public PdfGenerationException(Throwable cause)
{
super(myPdfExportView.class, Messages.getString("PdfView.errorexporting"), cause); //$NON-NLS-1$
}
public SeverityEnum getSeverity()
{
return SeverityEnum.ERROR;
}
}
}
注意：您可以更改字体在上面的类。你可以把颜色放在这个班上。
做一个displaytag.properties文件中的资源文件夹，并添加下面的值
export.pdf.class=decorators.myPdfExportView
我希望这个例子为你工作。但还有其他方法可以通过使用Apache fop来实现。通过这种方式，您需要为pdf指定style sheet。但我认为它更复杂。
如果你想去用它Here is the example