java excel转pdf 要求不能引用iText库

如果不使用iText库，你可以考虑使用Apache POI和Apache PDFBox这两个库来实现Excel转PDF的功能。具体步骤如下：

1.使用Apache POI读取Excel文件的内容，将内容渲染到PDF页面上。

2.使用Apache PDFBox创建PDF文档并将页面内容写入其中，生成PDF文件。

下面是一个Java示例代码，可以将Excel文件转换为PDF文件：

import java.io.*;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.*;
import org.apache.pdfbox.pdmodel.*;
import org.apache.pdfbox.pdmodel.font.*;
import org.apache.pdfbox.pdmodel.graphics.image.*;

public class ExcelToPdfConverter {

    public static void main(String[] args) throws Exception {
        // Load Excel file
        HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream("input.xls"));

        // Load PDF document
        PDDocument document = new PDDocument();

        // Create a new PDF page
        PDPage page = new PDPage(PDRectangle.A4);
        document.addPage(page);

        // Create a new content stream for the PDF page
        PDPageContentStream contentStream = new PDPageContentStream(document, page);

        // Set font and font size
        PDFont font = PDType1Font.TIMES_ROMAN;
        int fontSize = 12;

        // Set table parameters
        float margin = 72;
        float tableWidth = page.getMediaBox().getWidth() - 2 * margin;
        float yStartNewPage = page.getMediaBox().getHeight() - margin;
        float yStart = yStartNewPage;
        float bottomMargin = 70;
        float yPosition = 650;
        int rowsPerPage = 40;

        // Create a table from the Excel file
        HSSFSheet sheet = workbook.getSheetAt(0);
        int rowCount = sheet.getPhysicalNumberOfRows();
        int columnCount = sheet.getRow(0).getPhysicalNumberOfCells();

        float[] columnWidths = new float[columnCount];
        for (int i = 0; i < columnCount; i++) {
            columnWidths[i] = tableWidth / columnCount;
        }

        // Draw table header
        drawTableHeader(contentStream, yPosition, yStart, margin, tableWidth, font, fontSize, columnWidths, sheet);

        // Draw table rows
        int startRow = 1;
        int endRow = Math.min(startRow + rowsPerPage, rowCount);
        while (startRow < rowCount) {
            drawTableRows(contentStream, yPosition, yStart, margin, tableWidth, font, fontSize, columnWidths, sheet, startRow, endRow);
            endRow = Math.min(endRow + rowsPerPage, rowCount);
            drawFooter(contentStream, bottomMargin, margin, tableWidth, font, fontSize);
            document.addPage(page);
            contentStream.close();
            page = new PDPage(PDRectangle.A4);
            document.addPage(page);
            contentStream = new PDPageContentStream(document, page);
            yStart = yStartNewPage;
            startRow = endRow;
        }

        // Close the content stream
        contentStream.close();

        // Save the PDF document
        document.save("output.pdf");

        // Close the PDF document
        document.close();
    }

    private static void drawTableHeader(PDPageContentStream contentStream, float yPosition, float yStart, float margin, float tableWidth, PDFont font, int fontSize, float[] columnWidths, HSSFSheet sheet) throws IOException {
        contentStream.setFont(font, fontSize);

        float currentPosition = yPosition;
        for (int i = 0; i < columnWidths.length; i++) {
            String columnHeader = sheet.getRow(0).getCell(i).getStringCellValue();
            float columnWidth = columnWidths[i];
            contentStream.beginText();
            contentStream.moveTextPositionByAmount(margin + currentPosition, yStart);
            contentStream.drawString(columnHeader);
            contentStream.endText();
            currentPosition += columnWidth;
        }
    }

    private static void drawTableRows(PDPageContentStream contentStream, float yPosition, float yStart, float margin, float tableWidth, PDFont font, int fontSize, float[] columnWidths, HSSFSheet sheet, int startRow, int endRow) throws IOException {
        contentStream.setFont(font, fontSize);

        float currentPosition = yPosition;
        for (int i = startRow; i < endRow; i++) {
            float rowHeight = 0;
            HSSFRow row = sheet.getRow(i);
            for (int j = 0; j < columnWidths.length; j++) {
                HSSFCell cell = row.getCell(j);
                String cellValue = "";
                if (cell != null) {
                    switch (cell.getCellType()) {
                        case HSSFCell.CELL_TYPE_BOOLEAN:
                            cellValue = Boolean.toString(cell.getBooleanCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_NUMERIC:
                            cellValue = Double.toString(cell.getNumericCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_STRING:
                            cellValue = cell.getStringCellValue();
                            break;
                    }
                }
                float columnWidth = columnWidths[j];
                contentStream.beginText();
                contentStream.moveTextPositionByAmount(margin + currentPosition, yStart);
                contentStream.drawString(cellValue);
                contentStream.endText();
                currentPosition += columnWidth;
                rowHeight = Math.max(rowHeight, contentStream.getFont().getFontDescriptor().getFontBoundingBox().getHeight() / 1000 * fontSize);
            }
            yStart -= rowHeight;
            currentPosition = yPosition;
        }
    }

    private static void drawFooter(PDPageContentStream contentStream, float bottomMargin, float margin, float tableWidth, PDFont font, int fontSize) throws IOException {
        contentStream.setFont(font, fontSize);

        contentStream.beginText();
        contentStream.moveTextPositionByAmount(margin, bottomMargin);
        contentStream.drawString("Generated by ExcelToPdfConverter");
        contentStream.endText();
    }
}

该示例代码使用了Apache POI和Apache PDFBox库来将Excel文件转换为PDF文件。你可以根据自己的需要进行修改和调整。