我正在处理 pdf 报告应用程序。使用
itext 5.3.3.jar jdk 1.6
我正在尝试在 pdf 上打印 JTable。我正确获得了 JTable 图像,但无法获得 pdf 格式的图像。无论如何我可以在pdf上打印BufferedImage。我为此使用了以下代码:-
如果可能的话,尝试在 pdf 上写一个 bufferedImage。
private static void print(BufferedImage bi,JTable table) {
Document document = new Document(PageSize.A4.rotate());
try {
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("F:/jTable.pdf"));
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfTemplate pdfTemplate = cb.createTemplate(table.getWidth(), table.getHeight());
Image image = Image.getInstance(bi , null);
image.scaleToFit(table.getWidth(), table.getHeight());
table.addNotify();
table.validate();
Graphics2D g2 = pdfTemplate.createGraphics(table.getWidth(), table.getHeight());
table.print(g2);
pdfTemplate.addImage(image);
/*g2.setColor(Color.BLACK);
g2.drawRect(x-2, y-2, table.getWidth()+2, table.getHeight()+2);*/
//table.print(g2);
cb.addTemplate(pdfTemplate, 0,20);
} catch (Exception e) {
System.err.println(e.getMessage());
}
document.close();
}
但它向我展示了如下内容: -
图像必须具有绝对定位。线程“主”com.itextpdf.text.exceptions.IllegalPdfSyntaxException 中的异常:不平衡的保存/恢复状态运算符。在 com.itextpdf.text.pdf.PdfContentByte.sanityCheck(PdfContentByte.java:3083) 在 com.itextpdf.text.pdf.PdfContentByte.toPdf(PdfContentByte.java:248) 在 com.itextpdf.text.pdf.PdfFormXObject.( PdfFormXObject.java:88) 在 com.itextpdf.text.pdf.PdfTemplate.getFormXObject(PdfTemplate.java:247) 在 com.itextpdf.text.pdf.PdfWriter.addXFormsToBody(PdfWriter.java:1293) 在 com.itextpdf.text .pdf.PdfWriter.addSharedObjectsToBody(PdfWriter.java:1304) 在 com.itextpdf.text.pdf.PdfWriter.close(PdfWriter.java:1209) 在 com.itextpdf.text.pdf.PdfDocument.close(PdfDocument.java:768 ) 在 com.swing.data 的 com.itextpdf.text.Document.close(Document.java:398)。
以下是测试代码:-
package com.swing.data;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.FileOutputStream;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.JTableHeader;
import com.itextpdf.text.Document;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfTemplate;
import com.itextpdf.text.pdf.PdfWriter;
class TableImage {
BufferedImage bi = null;
public static void main(String[] args) throws Exception {
Object[][] data = {
{"Hari", new Integer(23), new Double(78.23), (true)},
{"James", new Integer(23), new Double(47.64), (false)},
{"Sally", new Integer(22), new Double(84.81), (true)}
};
String[] columns = {"Name", "Age", "GPA", "Pass"};
JTable table = new JTable(data, columns);
JScrollPane scroll = new JScrollPane(table);
JPanel p = new JPanel(new BorderLayout());
p.add(scroll, BorderLayout.CENTER);
JOptionPane.showMessageDialog(null, p);
JTableHeader h = table.getTableHeader();
int x = table.getWidth();
int y = table.getHeight();
table.setIntercellSpacing(new Dimension(0,0));
table.setDefaultRenderer(Object.class, new ColumnAlignmentRenderer(table.getDefaultRenderer(Object.class)));
BufferedImage bi = new BufferedImage(
x, y, BufferedImage.TYPE_INT_RGB);
Graphics g = bi.createGraphics();
Graphics2D g2 = (Graphics2D) g;
table.paint(g2);
JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(bi)));
print(bi,table);
//createPdf(true,table);
}
private static void print(BufferedImage bi,JTable table) {
Document document = new Document(PageSize.A4.rotate());
try {
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("F:/jTable.pdf"));
document.open();
PdfContentByte cb = writer.getDirectContent();
PdfTemplate pdfTemplate = cb.createTemplate(table.getWidth(), table.getHeight());
Image image = Image.getInstance(bi , null);
image.scaleToFit(table.getWidth(), table.getHeight());
table.addNotify();
table.validate();
Graphics2D g2 = pdfTemplate.createGraphics(table.getWidth(), table.getHeight());
table.print(g2);
pdfTemplate.addImage(image);
/*g2.setColor(Color.BLACK);
g2.drawRect(x-2, y-2, table.getWidth()+2, table.getHeight()+2);*/
//table.print(g2);
cb.addTemplate(pdfTemplate, 0,20);
} catch (Exception e) {
System.err.println(e.getMessage());
}
document.close();
}
private TableImage() {
}
}
谢谢!