如何使用 apache POI 在文档中换行

Question

我正在使用 Word 中的 POI 创建一个表格，该表格已成功创建，但我想在单元格中的每个文本之间换行，我无法做到，这是我到目前为止所做的，

XWPFTable candidateTrackerTable = document.createTable();
XWPFTableRow canndidateTrackerTableRowOne =  candidateTrackerTable.getRow(0);
canndidateTrackerTableRowOne.getCell(0).setText("Presented ");
canndidateTrackerTableRowOne.addNewTableCell().setText("Interview ");
canndidateTrackerTableRowOne.addNewTableCell().setText("Phone ");
canndidateTrackerTableRowOne.addNewTableCell().setText("Final Interview ");
canndidateTrackerTableRowOne.addNewTableCell().setText("Offer ");

XWPFTableRow canndidateTrackerTableRowTwo = null;
for(Map.Entry<Integer, ArrayList<String>> candidateName:aMap.entrySet()){
    canndidateTrackerTableRowTwo =  candidateTrackerTable.createRow();
    for(String s:candidateName.getValue()){
        //System.out.println("------>>"+s);
        canndidateTrackerTableRowTwo.getCell(0).setText(String.valueOf(s)+"\n");
    }
    for(Map.Entry<Integer, ArrayList<String>> candidatePhone:bMap.entrySet()){
        for(String s1:candidatePhone.getValue()){
            //System.out.println("------>>"+s1);
            canndidateTrackerTableRowTwo.getCell(1).setText(String.valueOf(s1));
        }
        for(Map.Entry<Integer, ArrayList<String>> candidateSkyped: cMap.entrySet())
            for(String s2:candidateSkyped.getValue())
                canndidateTrackerTableRowTwo.getCell(2).setText(String.valueOf(s2));
        for(Map.Entry<Integer, ArrayList<String>> candidateOnsite : dMap.entrySet())
            for(String s3:candidateOnsite.getValue())
                canndidateTrackerTableRowTwo.getCell(3).setText(String.valueOf(s3));
        for(Map.Entry<Integer, ArrayList<String>> candidateOffered : eMap.entrySet())
            for(String s4:candidateOffered.getValue())
                canndidateTrackerTableRowTwo.getCell(4).setText(String.valueOf(s4));
    }
}       

我想在每个candidateTrackerTableRowTwo.getCell(0).setText(String.valueOf(s)+"\n")之间添加新行；

Answer 1

要为表格单元格添加格式，请创建一个以段落和字符串作为参数的函数。此函数将从 para 创建一个 run，现在您可以将格式添加到此 run。

private static void tableText(List<XWPFParagraph> paragraph, String text) {
    XWPFRun run = paragraph.get(0).createRun();
    run.setFontSize(14);
    run.setFontFamily("Times New Roman");
    run.setText(text);
    run.addBreak();
    run.setText("Next line");
}

现在使用此函数将文本添加到表格中。

XWPFTableRow tableRow = table.createRow();
tableText(tableRow.getCell(0).getParagraphs(), " 6 ", true);

Answer 2

POI 网站列出了一种适合我的技术。

https://poi.apache.org/spreadsheet/quick-guide.html#Using+newlines+in+cells

在单元格中使用换行符

Workbook wb = new XSSFWorkbook();   //or new HSSFWorkbook();
Sheet sheet = wb.createSheet();

Row row = sheet.createRow(2);
Cell cell = row.createCell(2);
cell.setCellValue("Use \n with word wrap on to create a new line");

//to enable newlines you need set a cell styles with wrap=true
CellStyle cs = wb.createCellStyle();
cs.setWrapText(true);
cell.setCellStyle(cs);

//increase row height to accomodate two lines of text
row.setHeightInPoints((2*sheet.getDefaultRowHeightInPoints()));

//adjust column width to fit the content
sheet.autoSizeColumn((short)2);

FileOutputStream fileOut = new FileOutputStream("ooxml-newlines.xlsx");
wb.write(fileOut);
fileOut.close();

Answer 3

此代码对我进行了一些修改（循环在查找最后一次运行时出现了一些错误，并且忘记在其他段落中插入新行）（编辑：*正如 dellasavia 所说：“while”比“for each”以避免异常）。

                // Loop through runs in paragraph.
                int i_paragraph = 0;
                //for (XWPFRun xwpfRun : parrafo.getRuns()) { //EXCEPTION UPDATING RUNS IN THE PARAGRAPH
                while (i_paragraph < parrafo.getRuns().size()) { //BETTER THE WHILE
                    XWPFRun xwpfRun = parrafo.getRuns().get(i_paragraph);

                    // Split runs by new line character.
                    String textOfRun = xwpfRun.getText(0);
                    if (textOfRun.contains("\n")) {
                        String[] stringsOnNewLines = textOfRun.split("\n");

                        // For each additional line, create a new run. Add carriage return on previous.
                        for (int i = 0; i < stringsOnNewLines.length; i++) {

                            // For every run except last one, add a carriage return.
                            String textForLine = stringsOnNewLines[i];
                            if (i == stringsOnNewLines.length - 1) {
                                xwpfRun.setText(textForLine, 0);
                                xwpfRun.addCarriageReturn();
                            } else {
                                parrafo.insertNewRun(i);
                                XWPFRun newRun = parrafo.getRuns().get(i);
                                CTRPr rPr = newRun.getCTR().isSetRPr() ? newRun.getCTR().getRPr() : newRun.getCTR().addNewRPr();
                                rPr.set(xwpfRun.getCTR().getRPr());
                                newRun.setText(textForLine);
                                newRun.addCarriageReturn(); //ADD THE NEW LINE
                            }
                        }
                    }
                    i_paragraph++;
                }

Answer 4

Apache POI/OpenXML 格式无法识别传统的回车和换行符。相反，需要调用 XWPFRun.addCarriageReturn() 方法来创建新行。

您将需要遍历单元格段落并运行，然后将要出现在新行上的文本拆分为新的运行，然后在所有以前的运行中添加回车。

这里有一些代码可以帮助您入门。我没有测试这个，但我应该让你去。

// Loop through paragraphs in cell.
for ( XWPFParagraph xwpfParagraph : cell.getParagraphs() ) {

    // Loop through runs in paragraph.
    for ( XWPFRun xwpfRun : xwpfParagraph.getRuns() ) {

        // Split runs by new line character.
        String textOfRun = xwpfRun.getText( 0 );
        if ( textOfRun.contains( "\n" ) ) {
            String[] stringsOnNewLines = textOfRun.split( "\n" );

            // For each additional line, create a new run. Add carriage return on previous.
            for ( int i = 0; i < stringsOnNewLines.length; i++ ) {

                // For every run except last one, add a carriage return.
                String textForLine = stringsOnNewLines[i];
                if ( i < stringsOnNewLines.length - 1 ) {
                    xwpfRun.setText(textForLine, 0);
                    xwpfRun.addCarriageReturn();
                }
                else {
                    xwpfParagraph.insertNewRun( i );
                    XWPFRun newRun = paragraph.getRuns().get( i );
                    CTRPr rPr = newRun.getCTR().isSetRPr() ? newRun.getCTR().getRPr() : newRun.getCTR().addNewRPr();
                    rPr.set( xwpfRun.getCTR().getRPr() );
                    newRun.setText( textForLine );
                }
            }
        }
    }
}

Answer 5

这可能有点晚了。我有一个方法，我创建表格的标题（行 = 0），每个标题都有标题编号，然后我添加另一个带有参数文本的段落

public  static final String[] headings= {"Title", "Name", "Surname", "Address", "DOB","Notes"};

 '''
XWPFTableRow row = table.getRow(0);

for (int pos=0; pos < COLUMN_NUMBER; pos++) {
    addCellHeading(row, pos, headings[pos]);
}

...

private void addCellHeading(XWPFTableRow row, Integer pos, String text){

    XWPFTableCell cell = row.getCell(pos);
    XWPFParagraph headingNo = cell.addParagraph();
    headingNo.setAlignment(ParagraphAlignment.CENTER);
    XWPFRun run = headingNo.createRun();
    run.setBold(true);
    run.setText(String.valueOf(pos+1) + ". ");

    XWPFParagraph heading = cell.addParagraph();
    heading.setAlignment(ParagraphAlignment.CENTER);
    run = heading.createRun();
    run.setBold(true);
    run.setText(text);
}

Answer 6

请通过增加行高来检查。