iText - 合并单元格

 

iText中的PdfPTable和PdfPCell仅提供了合并列的功能（通过cell.setColspan(cellCount)实现），并未提供合并行的方法。如果需要生成下列表格，怎么实现呢？

 

A	D
B	C

 

可考虑在cell中添加一个表格来实现。对于上列表格，需先建立一个2列的表格。在表格的第一列中填充一个2行的表格即可。具体代码如下：

 

 1 package itext;
 2 
 3 import java.io.FileOutputStream;
 4 
 5 import com.lowagie.text.Element;
 6 import com.lowagie.text.PageSize;
 7 import com.lowagie.text.Paragraph;
 8 import com.lowagie.text.pdf.PdfPCell;
 9 import com.lowagie.text.pdf.PdfPTable;
10 import com.lowagie.text.pdf.PdfWriter;
11 
12 public class MergeCell {
13 
14     public static void main(String[] args) {
15         String tmpPath = "c:\\test.pdf";
16         PdfPCell cell;
17         PdfPCell iCell;
18         PdfPTable iTable;
19         float lineHeight1 = (float)25.0;
20         float lineHeight2 = (float)25.0;        
21         try{
22             Document pdfDoc = new Document(PageSize.A4.rotate(), 36, 36, 24, 36);
23             
24             PdfWriter.getInstance(pdfDoc, new FileOutputStream(tmpPath));    
25             
26             pdfDoc.open();
27             
28             PdfPTable headerTable = new PdfPTable(2);
29             headerTable.setWidthPercentage(40);
30             
31             //create a table to fill cell 1
32             iTable = new PdfPTable(2);
33             iCell = new PdfPCell(new Paragraph("A"));
34             iCell.setHorizontalAlignment(Element.ALIGN_CENTER);
35              iCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
36             iCell.setFixedHeight(lineHeight1);
37             //merge column
38             iCell.setColspan(2);
39             iTable.addCell(iCell);
40             iCell = new PdfPCell(new Paragraph("B"));
41             iCell.setHorizontalAlignment(Element.ALIGN_CENTER);
42             iCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
43             iCell.setFixedHeight(lineHeight2);
44             iTable.addCell(iCell);
45             iCell = new PdfPCell(new Paragraph("C"));
46             iCell.setHorizontalAlignment(Element.ALIGN_CENTER);
47             iCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
48             iCell.setFixedHeight(lineHeight2);
49             iTable.addCell(iCell);
50             cell = new PdfPCell(iTable);
51             cell.setPadding(0);
52             headerTable.addCell(cell);         
53             
54             //fill cell 2
55             cell = new PdfPCell(new Paragraph("D"));
56             cell.setHorizontalAlignment(Element.ALIGN_CENTER);
57             cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
58             cell.setPadding(0);
59             cell.setFixedHeight(lineHeight1+lineHeight2);
60             headerTable.addCell(cell);            
61             
62             pdfDoc.add(headerTable);
63             
64             pdfDoc.close();
65         
66         } catch(Exception e) {
67                 e.printStackTrace();
68         }
69     }
70 }

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