Java 使用 aspose-cells 转 Excel 为 PDF 丢失表格线，列过多分页，单元格内容显示不全问题

<License>
    <Data>
        <Products>
            <Product>Aspose.Total for Java</Product>
            <Product>Aspose.Words for Java</Product>
        </Products>
        <EditionType>Enterprise</EditionType>
        <SubscriptionExpiry>20991231</SubscriptionExpiry>
        <LicenseExpiry>20991231</LicenseExpiry>
        <SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber>
    </Data>
    <Signature>
        sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=
    </Signature>
</License>

pom

XML 复制代码

        <dependency>
            <groupId>com.aspose</groupId>
            <artifactId>aspose-cells</artifactId>
            <version>8.5.2</version>
            <scope>system</scope>
            <systemPath>${project.basedir}/src/main/resources/lib/aspose-cells-8.5.2.jar</systemPath>
        </dependency>

excel

准备一个 excel 文件，列多一些，并且每个单元格内容长度都大于显示的长度

问题复现

使用 aspose 转 excel 为 pdf 非常方便，只需要调个 api 就行了

Excel2PDFUtil

java 复制代码

public class Excel2PDFUtil {


    public static boolean getLicense() {
        boolean result = false;
        try {
            InputStream is = Excel2PDFUtil .class.getClassLoader().getResourceAsStream("\\license.xml");
            License asposeLic = new License();
            asposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }


    /**
     * excel 转 pdf
     *
     * @param excelPath excel文件路径
     * @param pdfPath pdf文件路径
     */

    public static Boolean excel2pdf(String excelPath, String pdfPath) {
        if (!getLicense()) {
            return false;
        }

        try {
            Workbook wb = new Workbook(excelPath);

            File pdfFile = new File(pdfPath);
            FileOutputStream fileOS = new FileOutputStream(pdfFile);

            wb.save(fileOS, SaveFormat.PDF);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
}

测试代码

java 复制代码

class Excel2PDFUtilTest {

    @Test
    void excel2pdf() {
        String excelPath = "C:\\Users\\luhc\\Desktop\\excel.xlsx";
        String pdfPath = "C:\\Users\\luhc\\Desktop\\pdf.pdf";

        Excel2PDFUtil.excel2pdf(excelPath, pdfPath);
    }
}

生成的 PDF 如下所示

可以看到转换后的 PDF 单个表格被分成了 2 页面来显示，而且每行单元格没有边框，并且每个单元格显示的内容也不全，这样转换得到的 pdf 是没有任何用处的，毫无意义。

如何解决

单元格的边框和单元格内容显示不全的问题，是可以在 excel 中设置单元格边框和文本自动换行来解决，这样直接转换的 pdf 就没问题了，这些设置实际上也可以由代码来设置，就不用去考虑 excel 源文件的单元格格式是否符合要求了。

至于列过多导致的分页问题，则可以在转换 pdf 时设置缩放参数

java 复制代码

PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();
pdfSaveOptions.setOnePagePerSheet(true);

最终代码

java 复制代码

public class Excel2PDFUtil {

    public static boolean getLicense() {
        boolean result = false;
        try {
            InputStream is = Excel2PDFUtil.class.getClassLoader().getResourceAsStream("\\license.xml");
            License asposeLic = new License();
            asposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }


    /**
     * excel 转 pdf
     *
     * @param excelPath excel文件路径
     * @param pdfPath pdf文件路径
     */

    public static Boolean excel2pdf(String excelPath, String pdfPath) {
        if (!getLicense()) {
            return false;
        }

        try {
            Workbook wb = new Workbook(excelPath);
            WorksheetCollection sheets = wb.getWorksheets();
            int sheetCount = sheets.getCount();
            for (int i = 0; i < sheetCount; i++) {
                Worksheet sheet = sheets.get(i);

                sheet.autoFitRows();

                Cells cells = sheet.getCells();
                int maxRow = cells.getMaxRow();
                int maxColumn = cells.getMaxColumn();
                for (int j = 0; j < maxRow; j++) {
                    for (int k = 0; k < maxColumn; k++) {
                        Cell cell = cells.get(j, k);
                        Style style = cell.getStyle();
                        BorderCollection borders = style.getBorders();
                        borders.getByBorderType(BorderType.TOP_BORDER).setLineStyle(CellBorderType.THIN);
                        borders.getByBorderType(BorderType.TOP_BORDER).setColor(Color.getBlack());
                        borders.getByBorderType(BorderType.BOTTOM_BORDER).setLineStyle(CellBorderType.THIN);
                        borders.getByBorderType(BorderType.BOTTOM_BORDER).setColor(Color.getBlack());
                        borders.getByBorderType(BorderType.LEFT_BORDER).setLineStyle(CellBorderType.THIN);
                        borders.getByBorderType(BorderType.LEFT_BORDER).setColor(Color.getBlack());
                        borders.getByBorderType(BorderType.RIGHT_BORDER).setLineStyle(CellBorderType.THIN);
                        borders.getByBorderType(BorderType.RIGHT_BORDER).setColor(Color.getBlack());

                        style.setHorizontalAlignment(TextAlignmentType.CENTER);

                        cell.setStyle(style);
                    }
                }
            }

            File pdfFile = new File(pdfPath);
            FileOutputStream fileOS = new FileOutputStream(pdfFile);

            PdfSaveOptions pdfSaveOptions = new PdfSaveOptions();
            pdfSaveOptions.setOnePagePerSheet(true);
            
            wb.save(fileOS, pdfSaveOptions);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
}