aspose.slides-15.9.0 将ppt转为pdf,去除水印

使用aspose.slides-15.9.0.jar将ppt转为pdf实现在线预览，去除水印。

下载地址：https://download.csdn.net/download/qq_31674229/32461644

import com.aspose.slides.License;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;

/**
 * 将ppt转换为pdf
 */
public class Ppt2PdfUtil {
    private static Logger logger = LoggerFactory.getLogger(Ppt2PdfUtil.class);

    public static boolean getLicense() {
        boolean result = false;
        InputStream is = null;
        try {
            is = Ppt2PdfUtil.class.getClassLoader().getResourceAsStream("license-slides.xml"); // license.xml应放在..\WebRoot\WEB-INF\classes路径下
            if(is != null ){
                License aposeLic = new License();
                aposeLic.setLicense(is);
                result = true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try{
                if(is != null){
                    is.close();
                }
            }catch (Exception e){
                e.printStackTrace();
            }
        }
        return result;
    }

    /**
     * 将ppt转换为pdf
     * @param inPath ppt存储路径
     * @param outPath pdf保存路径
     */
    public static void ppt2pdf(String inPath, String outPath) {
        if (!getLicense() || StringUtils.isEmpty(inPath) || StringUtils.isEmpty(outPath)) { // 验证License 若不验证则转化出的pdf文档会有水印产生
            return;
        }
        try {
            long old = System.currentTimeMillis();
            File file = new File(outPath); // 新建一个空白pdf文档
            FileOutputStream os = new FileOutputStream(file);
            Presentation pres = new Presentation (inPath); // Address是将要被转化的ppt文档
            pres.save(os, SaveFormat.Pdf);// 全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF,EPUB, XPS, SWF 相互转换

            os.flush();
            os.close();
            long now = System.currentTimeMillis();
            System.out.println("Ppt转换成功，共耗时：" + ((now - old) / 1000.0) + "秒"); // 转化用时
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * 将ppt转为pdf
     * @param input 需要转换的ppt
     * @param saveFile 保存pdf文件
     */
    public static void ppt2pdf(InputStream input, File saveFile) {
        if (!getLicense() || input==null || saveFile==null) { // 验证License 若不验证则转化出的pdf文档会有水印产生
            return;
        }
        try {
            long old = System.currentTimeMillis();
            FileOutputStream os = new FileOutputStream(saveFile);

            Presentation pres = new Presentation (input); // Address是将要被转化的excel文档
            pres.save(os, SaveFormat.Pdf);// 全面支持DOC, DOCX, OOXML, RTF HTML, OpenDocument, PDF,EPUB, XPS, SWF 相互转换

            os.flush();
            os.close();
            long now = System.currentTimeMillis();
            System.out.println("Ppt转换成功，共耗时：" + ((now - old) / 1000.0) + "秒"); // 转化用时
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}