excel转pdf的实现方法总结

1. 使用Apache POI + iText

首先，需要将Excel的内容转换为HTML，然后再使用iText将其转换为PDF。这里假设有一个简单的HTML生成器来处理Excel内容。

引入依赖（Maven）

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>5.2.2</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext7-core</artifactId>
    <version>7.2.2</version>
</dependency>

示例代码

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.property.TextAlignment;
import java.io.*;

public class ExcelToPdfConverter {
   
    public static void main(String[] args) throws IOException {
   
        String excelFilePath = "path/to/excel/file.xlsx";
        String pdfFilePath = "path/to/output/file.pdf";

        // Load the Excel file
        try (FileInputStream fis = new FileInputStream(excelFilePath)) {
   
            XSSFWorkbook workbook = new XSSFWorkbook(fis);
            Sheet sheet = workbook.getSheetAt(0); // Assume first sheet

            // Create PDF document
            PdfWriter writer = new PdfWriter(pdfFilePath);
            PdfDocument pdfDoc = new PdfDocument(writer);
            Document doc = new Document(pdfDoc);

            // Convert each row in the Excel sheet to a paragraph and add it to the PDF
            for (Row row : sheet) {
   
                StringBuilder sb = new StringBuilder