使用 java 将 excel 文件转 html、pdf ，以及 pdf 合并和拆分

在Java中，可以使用Apache POI库来读取和写入Excel文件，以及使用iText库来创建PDF文件。以下是将Excel转换为HTML和PDF，以及合并和拆分PDF文件的示例代码。

转换Excel到HTML:




import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 
import java.io.*;
 
public class ExcelToHtml {
    public static void main(String[] args) throws IOException {
        Workbook workbook = new XSSFWorkbook(new FileInputStream("example.xlsx"));
        Sheet sheet = workbook.getSheetAt(0);
 
        StringBuilder htmlBuilder = new StringBuilder();
        htmlBuilder.append("<html><body>");
 
        for (Row row : sheet) {
            htmlBuilder.append("<tr>");
            for (Cell cell : row) {
                htmlBuilder.append("<td>");
                htmlBuilder.append(cell.toString());
                htmlBuilder.append("</td>");
            }
            htmlBuilder.append("</tr>");
        }
 
        htmlBuilder.append("</body></html>");
 
        try (FileWriter writer = new FileWriter("example.html")) {
            writer.write(htmlBuilder.toString());
        }
    }
}

转换Excel到PDF:




import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
 
import java.io.*;
 
public class ExcelToPdf {
    public static void main(String[] args) throws IOException, DocumentException {
        Workbook workbook = new XSSFWorkbook(new FileInputStream("example.xlsx"));
        Sheet sheet = workbook.getSheetAt(0);
 
        Document document = new Document();
        PdfWriter.getInstance(document, new FileOutputStream("example.pdf"));
        document.open();
 
        for (Row row : sheet) {
            Paragraph paragraph = new Paragraph();
            for (Cell cell : row) {
                paragraph.add(new Paragraph(cell.toString()));
            }
            document.add(paragraph);
        }
 
        document.close();
    }
}

合并PDF文件:




import com.itextpdf.kernel.pdf.*;
 
import java.io.*;
 
public class MergePdf {
    public static void main(String[] args) throws IOException {
        PdfReader pdfReader1 = new PdfReader("file1.pdf");
        PdfReader pdfReader2 = new PdfReader("file2.pdf");
 
        PdfWriter pdfWriter = new PdfWriter("merged.pdf");
        PdfDocu

使用 java 将 excel 文件转 html、pdf ，以及 pdf 合并和拆分

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