POI Word 无法垂直合并新创建的单元格
POI Word Unable to merge newly created cell vertically
我知道如何使用 Apache POI word 垂直合并单元格。但是貌似如果新建一行，合并不会生效
这里是输入 table:
我想在 old row 2 和 old row 3 之间添加一个新行，并将新行的第一列单元格合并到 C2 中，如下所示：
所以我创建了一个新行并将其添加到 old row 2 下面的 table，并尝试合并单元格
github源代码link is here，可以重现问题。
public class POIWordAddSubRowQuestionDemo{
public static void main(String[] args) throws IOException, XmlException{
ClassLoader classLoader = POIWordAddSubRowQuestionDemo.class.getClassLoader();
InputStream inputStream = classLoader.getResourceAsStream("input.docx");
String outputDocxPath = "F:/TEMP/output.docx";
assert inputStream != null;
XWPFDocument doc = new XWPFDocument(inputStream);
XWPFTable table = doc.getTables().get(0);
//this is 'old row 2'
XWPFTableRow secondRow = table.getRows().get(1);
//create a new row that is based on 'old row 2'
CTRow ctrow = CTRow.Factory.parse(secondRow.getCtRow().newInputStream());
XWPFTableRow newRow = new XWPFTableRow(ctrow, table);
XWPFRun xwpfRun = newRow.getCell(1).getParagraphs().get(0).getRuns().get(0);
//set row text
xwpfRun.setText("new row", 0);
// add new row below 'old row 2'
table.addRow(newRow, 2);
//merge cells at first column of 'old row 2', 'new row', and 'old row 3'
mergeCellVertically(doc.getTables().get(0), 0, 1, 3);
FileOutputStream fos = new FileOutputStream(outputDocxPath);
doc.write(fos);
fos.close();
}
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);
}
}
}
但是合并没有成功，我得到：
我又尝试根据图3中的table合并得到图2中的table，成功了。两次尝试之间的唯一区别是 new row 不是新创建的，而是从 docx 文档中读取的，所以我相信创建新行是合并失败的原因。
那么有合并新建行的解决方案吗？我真的不想这样拆分此操作：添加行 > 将 docx 保存到磁盘 > 从磁盘读取 docx > 合并行。
这是您可能想要采用的 VBA 方法。它在第 3 行和第 4 行之间插入一个新行：
Sub Demo()
Application.ScreenUpdating = False
With ActiveDocument.Tables(1)
.Cell(4, 2).Range.InsertBreak (wdColumnBreak)
.Rows.Add
.Cell(2, 1).Merge MergeTo:=.Cell(4, 1)
.Range.Characters.Last.Next.Delete
.Cell(2, 1).Merge MergeTo:=.Cell(5, 1)
End With
Application.ScreenUpdating = True
End Sub
您遇到的问题不是 mergeCellVertically 方法，而是您复制 table 行的方法。复制基础 CTRow 并使用 XWPFTable.addRow 将其插入 CTTbl.TrArray 时，它必须完全完整。后面的改动就不写在XML里面了。我在回答 already. And I provided a method commitTableRows in my answer 中说过了。这个方法需要在文档写出来之前调用，所以后面的修改写在XML.
因为您正在复制第二行，这是合并的开始，所以该设置也会被复制。而后面调用的mergeCellVertically不生效。所以你的 newRow 仍然是合并的新起点。这就是你得到的。
所以在所有更改之后和写出之前，调用 commitTableRows.
完整示例：
import java.io.*;
import org.apache.poi.xwpf.usermodel.*;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;
public class WordInsertTableRowAndMerge {
static XWPFTableRow insertNewTableRow(XWPFTableRow sourceTableRow, int pos) throws Exception {
XWPFTable table = sourceTableRow.getTable();
CTRow newCTRrow = CTRow.Factory.parse(sourceTableRow.getCtRow().newInputStream());
XWPFTableRow tableRow = new XWPFTableRow(newCTRrow, table);
table.addRow(tableRow, pos);
return tableRow;
}
static void commitTableRows(XWPFTable table) {
int rowNr = 0;
for (XWPFTableRow tableRow : table.getRows()) {
table.getCTTbl().setTrArray(rowNr++, tableRow.getCtRow());
}
}
static void mergeCellVertically(XWPFTable table, int col, int fromRow, int toRow) {
for(int rowIndex = fromRow; rowIndex <= toRow; rowIndex++) {
System.out.println("rowIndex: " + 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 doc = new XWPFDocument(new FileInputStream("./source.docx"));
XWPFTable table = doc.getTables().get(0);
XWPFTableRow row = table.getRow(1);
XWPFTableRow newRow = insertNewTableRow(row, 2);
XWPFTableCell cell = newRow.getCell(0); if (cell == null) cell = newRow.addNewTableCell();
// not needed because merged to cell above
cell = newRow.getCell(1); if (cell == null) cell = newRow.addNewTableCell();
for (XWPFParagraph paragraph : cell.getParagraphs()) { // only use first text runs in paragraphs
for (int r = paragraph.getRuns().size()-1; r >= 0; r--) {
XWPFRun run = paragraph.getRuns().get(r);
if (r == 0) {
run.setText("new row 1", 0);
} else {
paragraph.removeRun(r);
}
}
}
mergeCellVertically(table, 0, 1, 3);
commitTableRows(table);
FileOutputStream out = new FileOutputStream("./result.docx");
doc.write(out);
out.close();
doc.close();
}
}
我知道如何使用 Apache POI word 垂直合并单元格。但是貌似如果新建一行，合并不会生效
这里是输入 table:
我想在 old row 2 和 old row 3 之间添加一个新行，并将新行的第一列单元格合并到 C2 中，如下所示：
所以我创建了一个新行并将其添加到 old row 2 下面的 table，并尝试合并单元格
github源代码link is here，可以重现问题。
public class POIWordAddSubRowQuestionDemo{
public static void main(String[] args) throws IOException, XmlException{
ClassLoader classLoader = POIWordAddSubRowQuestionDemo.class.getClassLoader();
InputStream inputStream = classLoader.getResourceAsStream("input.docx");
String outputDocxPath = "F:/TEMP/output.docx";
assert inputStream != null;
XWPFDocument doc = new XWPFDocument(inputStream);
XWPFTable table = doc.getTables().get(0);
//this is 'old row 2'
XWPFTableRow secondRow = table.getRows().get(1);
//create a new row that is based on 'old row 2'
CTRow ctrow = CTRow.Factory.parse(secondRow.getCtRow().newInputStream());
XWPFTableRow newRow = new XWPFTableRow(ctrow, table);
XWPFRun xwpfRun = newRow.getCell(1).getParagraphs().get(0).getRuns().get(0);
//set row text
xwpfRun.setText("new row", 0);
// add new row below 'old row 2'
table.addRow(newRow, 2);
//merge cells at first column of 'old row 2', 'new row', and 'old row 3'
mergeCellVertically(doc.getTables().get(0), 0, 1, 3);
FileOutputStream fos = new FileOutputStream(outputDocxPath);
doc.write(fos);
fos.close();
}
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);
}
}
}
但是合并没有成功，我得到：
我又尝试根据图3中的table合并得到图2中的table，成功了。两次尝试之间的唯一区别是 new row 不是新创建的，而是从 docx 文档中读取的，所以我相信创建新行是合并失败的原因。
那么有合并新建行的解决方案吗？我真的不想这样拆分此操作：添加行 > 将 docx 保存到磁盘 > 从磁盘读取 docx > 合并行。
这是您可能想要采用的 VBA 方法。它在第 3 行和第 4 行之间插入一个新行：
Sub Demo()
Application.ScreenUpdating = False
With ActiveDocument.Tables(1)
.Cell(4, 2).Range.InsertBreak (wdColumnBreak)
.Rows.Add
.Cell(2, 1).Merge MergeTo:=.Cell(4, 1)
.Range.Characters.Last.Next.Delete
.Cell(2, 1).Merge MergeTo:=.Cell(5, 1)
End With
Application.ScreenUpdating = True
End Sub
您遇到的问题不是 mergeCellVertically 方法，而是您复制 table 行的方法。复制基础 CTRow 并使用 XWPFTable.addRow 将其插入 CTTbl.TrArray 时，它必须完全完整。后面的改动就不写在XML里面了。我在回答 commitTableRows in my answer XML.
因为您正在复制第二行，这是合并的开始，所以该设置也会被复制。而后面调用的mergeCellVertically不生效。所以你的 newRow 仍然是合并的新起点。这就是你得到的。
所以在所有更改之后和写出之前，调用 commitTableRows.
完整示例：
import java.io.*;
import org.apache.poi.xwpf.usermodel.*;
import org.openxmlformats.schemas.wordprocessingml.x2006.main.*;
public class WordInsertTableRowAndMerge {
static XWPFTableRow insertNewTableRow(XWPFTableRow sourceTableRow, int pos) throws Exception {
XWPFTable table = sourceTableRow.getTable();
CTRow newCTRrow = CTRow.Factory.parse(sourceTableRow.getCtRow().newInputStream());
XWPFTableRow tableRow = new XWPFTableRow(newCTRrow, table);
table.addRow(tableRow, pos);
return tableRow;
}
static void commitTableRows(XWPFTable table) {
int rowNr = 0;
for (XWPFTableRow tableRow : table.getRows()) {
table.getCTTbl().setTrArray(rowNr++, tableRow.getCtRow());
}
}
static void mergeCellVertically(XWPFTable table, int col, int fromRow, int toRow) {
for(int rowIndex = fromRow; rowIndex <= toRow; rowIndex++) {
System.out.println("rowIndex: " + 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 doc = new XWPFDocument(new FileInputStream("./source.docx"));
XWPFTable table = doc.getTables().get(0);
XWPFTableRow row = table.getRow(1);
XWPFTableRow newRow = insertNewTableRow(row, 2);
XWPFTableCell cell = newRow.getCell(0); if (cell == null) cell = newRow.addNewTableCell();
// not needed because merged to cell above
cell = newRow.getCell(1); if (cell == null) cell = newRow.addNewTableCell();
for (XWPFParagraph paragraph : cell.getParagraphs()) { // only use first text runs in paragraphs
for (int r = paragraph.getRuns().size()-1; r >= 0; r--) {
XWPFRun run = paragraph.getRuns().get(r);
if (r == 0) {
run.setText("new row 1", 0);
} else {
paragraph.removeRun(r);
}
}
}
mergeCellVertically(table, 0, 1, 3);
commitTableRows(table);
FileOutputStream out = new FileOutputStream("./result.docx");
doc.write(out);
out.close();
doc.close();
}
}