Java可以使用Apache POI和iText两个库来实现Excel转PDF的功能。

这里是使用iText的方式

添加依赖

<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>5.2.3</version>
</dependency>
<dependency><groupId>com.itextpdf</groupId><artifactId>itext7-core</artifactId><version>7.1.16</version>
</dependency>

下面是一个使用Apache POI将Excel转换为PDF的示例代码：

import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;public class Test {public static void main(String[] args) {String excelFilePath = "F:\\tmp\\input.xlsx"; // 输入的Excel文件路径String pdfFilePath = "F:\\tmp\\output.pdf"; // 输出的PDF文件路径try {convertExcelToPdf(excelFilePath, pdfFilePath);System.out.println("转换成功！");} catch (IOException e) {e.printStackTrace();}}private static void convertExcelToPdf(String excelFilePath, String pdfFilePath) throws IOException {Workbook workbook = new XSSFWorkbook(new FileInputStream(excelFilePath));PdfWriter writer = new PdfWriter(new FileOutputStream(pdfFilePath));PdfDocument pdfDoc = new PdfDocument(writer);Document document = new Document(pdfDoc);
// 设置中文字体PdfFont font = PdfFontFactory.createFont("STSongStd-Light", "UniGB-UCS2-H", true);for (int i = 0; i < workbook.getNumberOfSheets(); i++) {Sheet sheet = workbook.getSheetAt(i);document.add(new Paragraph("Sheet: " + sheet.getSheetName()).setFont(font));for (Row row : sheet) {StringBuilder rowData = new StringBuilder();for (Cell cell : row) {switch (cell.getCellType()) {case STRING:rowData.append(cell.getStringCellValue()).append(" ");break;case NUMERIC:rowData.append(cell.getNumericCellValue()).append(" ");break;case BOOLEAN:rowData.append(cell.getBooleanCellValue()).append(" ");break;default:rowData.append(" ");}}document.add(new Paragraph(rowData.toString().trim()).setFont(font));}document.add(new Paragraph("\n")); // 分隔不同的工作表}document.close();workbook.close();}
}

注意，以上示例代码中的input.xlsx是输入的Excel文件名，output.pdf是输出的PDF文件名。

pdf生成时需要设置字体，否则生成的pdf中，中文将无法显示。