在POI XWPFTable中垂直合并多行会导致格式错误的表

Question

我有一个大小为4x4的XWPFTable sampleTable，我希望前三列合并如下

。但是，在这里运行代码之后：

XWPFTable sampleTable=sampleDOCX.createTable(4, 4);
             for(int col=0;col<3;col++){
                for(int row=0;row<4;row++){
                    XWPFTableCell cell=sampleTable.getRow(row).getCell(col);
                    if(row==0){
                        cell.getCTTc().addNewTcPr().addNewVMerge().setVal(STMerge.RESTART);
                    }else{
                        cell.getCTTc().addNewTcPr().addNewVMerge().setVal(STMerge.CONTINUE);
                    }
                }
            }

我得到的桌子是

。前两列正在以某种方式删除它们的行。

编辑:在仔细检查时，<w:vMerge w:val="restart"/>值没有添加到XML的单元格0和1中，这意味着STMerge.RESTART没有添加到它们中。为什么标签没有写在上面？

Answer 1

您的代码有以下缺点:使用cell.getCTTc().addNewTcPr()，代码总是添加新的TcPr。但是，如果表单元格已经具有表单元格属性怎么办？表单元格必须只有一个TcPr。

我在How to colspan a table in word with APACHE POI中的代码考虑了这一点。mergeCellVertically(XWPFTable table, int col, int fromRow, int toRow)方法总是首先尝试获取TcPr，并且只有在得到null之后才会添加一个新的TcPr。

但LibreOffice和OpenOffice都是自己的东西。正如我在链接答案中的代码所告诉的那样，LibreOffice和OpenOffice需要表格网格才能完全接受这些表。网格的目的是定义列宽比。因此，如果表的宽度设置为"100%"，那么正确的网格宽度并不重要。只有比率才重要。

再次完成示例：

import java.io.FileOutputStream;

import java.math.BigInteger;

import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFTable;
import org.apache.poi.xwpf.usermodel.XWPFTableCell;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.apache.poi.xwpf.usermodel.XWPFRun;

import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTTcPr;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTVMerge;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.STMerge;

public class CreateWordTableMergeTest {

 static void mergeCellVertically(XWPFTable table, int col, int fromRow, int toRow) {
  for(int rowIndex = fromRow; rowIndex <= toRow; rowIndex++) {
   XWPFTableCell cell = table.getRow(rowIndex).getCell(col);
   CTVMerge vmerge = CTVMerge.Factory.newInstance();
   if(rowIndex == fromRow){
    // The first merged cell is set with RESTART merge value
    vmerge.setVal(STMerge.RESTART);
   } else {
    // Cells which join (merge) the first one, are set with CONTINUE
    vmerge.setVal(STMerge.CONTINUE);
    // and the content should be removed
    for (int i = cell.getParagraphs().size(); i > 0; i--) {
     cell.removeParagraph(0);
    }
    cell.addParagraph();
   }
   // Try getting the TcPr. Not simply setting an new one every time.
   CTTcPr tcPr = cell.getCTTc().getTcPr();
   if (tcPr == null) tcPr = cell.getCTTc().addNewTcPr();
   tcPr.setVMerge(vmerge);
  }
 }

 public static void main(String[] args) throws Exception {

  XWPFDocument document= new XWPFDocument();

  XWPFParagraph paragraph = document.createParagraph();
  XWPFRun run=paragraph.createRun();  
  run.setText("The table:");

  //create table
  XWPFTable table = document.createTable(4,4);
  table.setWidth("100%");

  //create CTTblGrid for this table with widths of the 4 columns. 
  //necessary for Libreoffice/Openoffice to accept the column widths.
  //values are in unit twentieths of a point (1/1440 of an inch)
  //first column = 1 inches width
  table.getCTTbl().addNewTblGrid().addNewGridCol().setW(BigInteger.valueOf(1*1440));
  //other columns (3 in this case) also each 1 inches width
  for (int col = 1 ; col < 4; col++) {
   table.getCTTbl().getTblGrid().addNewGridCol().setW(BigInteger.valueOf(1*1440));
  }

  //using the merge methods
  mergeCellVertically(table, 0, 0, 3); 
  mergeCellVertically(table, 1, 0, 3); 
  mergeCellVertically(table, 2, 0, 3); 

  paragraph = document.createParagraph();

  FileOutputStream out = new FileOutputStream("./create_table.docx"); 
  document.write(out);
  out.close();
  document.close();
 }
}

也应该在LibreOffice中领导o表：

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