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将文档从一种格式转换为另一种格式是Spire.XLS的主要功能之一。这种转换只不过是加载和保存操作的组合。因此，使用Spire.XLS可以将文档从任何受支持的加载格式转换为任何受支持的保存格式。

本文整理了包括在Java中以下文件格式的转换指南，希望对您有所帮助：

• 将Excel转换为PDF
  
• 将Excel转换为图像
  
• 将Excel转换为TIFF
  

>>你可以点击这里下载Spire.XLS for Java测试体验。

将Excel转换为PDF

将整个Excel工作簿转换为PDF。

import com.spire.xls.*;

public class ExceltoPDF {
    public static void main(String[] args) {
        //Create a Workbook
        Workbook workbook = new Workbook();
        workbook.loadFromFile("Sample.xlsx");

        //Fit to page
        workbook.getConverterSetting().setSheetFitToPage(true);

        workbook.saveToFile("ToPDF.pdf",FileFormat.PDF);
    }
}

将单个Excel工作表转换为PDF。

import com.spire.xls.*;

public class ExceltoPDF {
    public static void main(String[] args) {
        //Create a Workbook
        Workbook workbook = new Workbook();
        workbook.loadFromFile("Sample.xlsx");

        //Get the first worksheet
        Worksheet worksheet = workbook.getWorksheets().get(0);

        worksheet.saveToPdf("ToPDF2.pdf");
    }
}

将Excel转换为Java中的图像

import com.spire.xls.*;
import java.io.*;

public class ExcelToImage {
    public static void main(String[] args) throws IOException {
        //Create a workbook instance
        Workbook workbook = new Workbook();
        //Load the Excel file
        workbook.loadFromFile("Chart.xlsx");

        //Get the first worksheet
        Worksheet sheet = workbook.getWorksheets().get(0);

        //Save the sheet to image
        sheet.saveToImage("image.png");
    }
}

将Excel转换为TIFF

import com.spire.xls.Workbook;
import com.spire.xls.Worksheet;

public class ConvertExcelToTIFF {
    public static void main(String[] args) {
        //Create a Workbook instance
        Workbook workbook = new Workbook();
        //Load the Excel file
        workbook.loadFromFile("Input.xlsx");

        //Get the first worksheet
        Worksheet sheet = workbook.getWorksheets().get(0);

        //Save the first worksheet to TIFF
        sheet.saveToTiff("SheetToTiff.tiff");

        //Save a particular cell range in the first worksheet to TIFF
        //sheet.saveToTiff("CellRangeToTiff.tiff",1,1,5,2);
    }
}