使用 Apache POI 来自 Excel 的 HTML 格式单元格值

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问题描述

我正在使用 apache POI 读取 Excel 文档.至少可以说，它目前能够达到我的目的.但我感到震惊的一件事是将单元格的值提取为 HTML.

I am using apache POI to read an excel document. To say the least, it is able to serve my purpose as of now. But one thing where I am getting struck is extracting the value of cell as HTML.

我有一个单元格，用户将在其中输入一些字符串并应用一些格式(如项目符号/数字/粗体/斜体) 等.

I have one cell wherein user will enter some string and apply some formatting(like bullets/numbers/bold/italic) etc.

所以当我阅读它时，内容应该是 HTML 格式，而不是 POI 给出的纯字符串格式.

SO when I read it the content should be in HTML format and not a plain string format as given by POI.

我几乎浏览了整个 POI API，但找不到任何人.我想只保留一列的格式，而不是整个 excel.我所说的列是指在该列中输入的文本.我希望该文本为 HTML 文本.

I have almost gone through the entire POI API but not able to find anyone. I want to remain the formatting of just one particular column and not the entire excel. By column I mean, the text which is entered in that column. I want that text as HTML text.

还探索和使用了 Apache Tika.但是，据我所知，它只能获取文本，而不能获取文本的格式.

Explored and used Apache Tika also. However as I understand it can only get me the text but not the formatting of the text.

请有人指导我.我的选择不多了.

Please someone guide me. I am running out of options.

假设我在 Excel 中写了 My name is Angel 和 Demon.

Suppose I wrote My name is Angel and Demon in Excel.

我应该在 Java 中得到的输出是 My name is Angel和恶魔

The output I should get in Java is My name is Angel and Demon

推荐答案

我已将此作为 unicode 粘贴到 xls 文件的单元格 A1 中:

I've paste this as unicode to cell A1 of xls file:

<html><p>This is a test. Will this text be <b>bold</b> or <i>italic</i></p></html>

这个 html 行产生这个:

This html line produce this:

这是一个测试.这段文字是粗体还是斜体

This is a test. Will this text be bold or italic

我的代码:

public class ExcelWithHtml {
    // <html><p>This is a test. Will this text be <b>bold</b> or
    // <i>italic</i></p></html>

    public static void main(String[] args) throws FileNotFoundException,
            IOException {
        new ExcelWithHtml()
                .readFirstCellOfXSSF("/Users/rcacheira/testeHtml.xlsx");
    }

    boolean inBold = false;
    boolean inItalic = false;

    public void readFirstCellOfXSSF(String filePathName)
            throws FileNotFoundException, IOException {
        FileInputStream fis = new FileInputStream(filePathName);
        XSSFWorkbook wb = new XSSFWorkbook(fis);
        XSSFSheet sheet = wb.getSheetAt(0);

        String cellHtml = getHtmlFormatedCellValueFromSheet(sheet, "A1");

        System.out.println(cellHtml);

        fis.close();
    }

    public String getHtmlFormatedCellValueFromSheet(XSSFSheet sheet,
            String cellName) {

        CellReference cellReference = new CellReference(cellName);
        XSSFRow row = sheet.getRow(cellReference.getRow());
        XSSFCell cell = row.getCell(cellReference.getCol());

        XSSFRichTextString cellText = cell.getRichStringCellValue();

        String htmlCode = "";
        // htmlCode = "<html>";

        for (int i = 0; i < cellText.numFormattingRuns(); i++) {
            try {
                htmlCode += getFormatFromFont(cellText.getFontAtIndex(i));
            } catch (NullPointerException ex) {
            }
            try {
                htmlCode += getFormatFromFont(cellText
                        .getFontOfFormattingRun(i));
            } catch (NullPointerException ex) {
            }

            int indexStart = cellText.getIndexOfFormattingRun(i);
            int indexEnd = indexStart + cellText.getLengthOfFormattingRun(i);

            htmlCode += cellText.getString().substring(indexStart, indexEnd);
        }

        if (inItalic) {
            htmlCode += "</i>";
            inItalic = false;
        }
        if (inBold) {
            htmlCode += "</b>";
            inBold = false;
        }

        // htmlCode += "</html>";
        return htmlCode;

    }

    private String getFormatFromFont(XSSFFont font) {
        String formatHtmlCode = "";
        if (font.getItalic() && !inItalic) {
            formatHtmlCode += "<i>";
            inItalic = true;
        } else if (!font.getItalic() && inItalic) {
            formatHtmlCode += "</i>";
            inItalic = false;
        }

        if (font.getBold() && !inBold) {
            formatHtmlCode += "<b>";
            inBold = true;
        } else if (!font.getBold() && inBold) {
            formatHtmlCode += "</b>";
            inBold = false;
        }

        return formatHtmlCode;
    }

}

我的输出:

This is a test. Will this text be <b>bold</b> or <i>italic</i>

我认为这就是您想要的，我只是向您展示了可能性，我没有使用最佳代码实践，我只是快速编程以产生输出.

I think it is what you want, i'm only show you the possibilities, i'm not using the best code practices, i'm just programming fast to produce an output.

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