Office文件生成预览图片

所需jar包

• aspose-slides-1.0.0.jar
• aspose-cells-1.0.0.jar
• aspose-words-1.0.0.jar

配置文件

放在resources资源文件夹下

<License>
    <Data>
        <Products>
            <Product>Aspose.Total for Java</Product>
            <Product>Aspose.Words for Java</Product>
        </Products>
        <EditionType>Enterprise</EditionType>
        <SubscriptionExpiry>20991231</SubscriptionExpiry>
        <LicenseExpiry>20991231</LicenseExpiry>
        <SerialNumber>8bfe198c-7f0c-4ef8-8ff0-acc3237bf0d7</SerialNumber>
    </Data>
    <Signature>sNLLKGMUdF0r8O1kKilWAGdgfs2BvJb/2Xp8p5iuDVfZXmhppo+d0Ran1P9TKdjV4ABwAgKXxJ3jcQTqE/2IRfqwnPf8itN8aFZlV3TJPYeD3yWE7IT55Gz6EijUpC7aKeoohTb4w2fpox58wWoF3SNp6sK6jDfiAUGEHYJ9pjU=</Signature>
</License>

Word文档生成预览图片

import com.aspose.words.Document;
import com.aspose.words.ImageSaveOptions;
import com.aspose.words.License;
import com.aspose.words.SaveFormat;
import javax.servlet.http.HttpServletResponse;
import java.io.*;

public class WordToPDF {

    HttpServletResponse response = null;

    public static boolean getLicense() {
        boolean result = false;
        try {
            InputStream is = WordToPDF.class.getClassLoader().getResourceAsStream("license.xml");
            License aposeLic = new License();
            aposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     *  文档转图片
     * @param inPath 传入文档地址
     * @param outDir 输出的图片文件夹地址
     */
    public static void doc2Img(String inPath, String outDir){
        try {
            if (!getLicense()) {
                throw new Exception("com.aspose.words lic ERROR!");
            }
            Document doc = new Document(inPath);
            ImageSaveOptions options = new ImageSaveOptions(SaveFormat.PNG);
            int pageCount = 1;
            for (int i = 0; i < pageCount; i++) {
                File file = new File(outDir);
                FileOutputStream os = new FileOutputStream(file);
                options.setPageIndex(i);
                doc.save(os, options);
                os.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Excel生成预览图片

import com.aspose.cells.*;
import java.io.*;

public class ExcelToPDF {

    public static boolean getLicense() {
        boolean result = false;
        try {
            InputStream is = ExcelToPDF.class.getClassLoader().getResourceAsStream("license.xml");
            License aposeLic = new License();
            aposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     *  Excel转图片
     * @param inPath 传入文档地址
     * @param outDir 输出的图片文件夹地址
     */
    public static void exc2Img(String inPath, String outDir){
        try {
            if (!getLicense()) {
                throw new Exception("com.aspose.words lic ERROR!");
            }
            // Excel文档
            Workbook book = new Workbook(inPath);
            Worksheet sheet = book.getWorksheets().get(0);
            ImageOrPrintOptions imgOptions = new ImageOrPrintOptions();
            imgOptions.setImageFormat(ImageFormat.getJpeg());
            imgOptions.setCellAutoFit(true);
            imgOptions.setOnePagePerSheet(true);
            SheetRender render = new SheetRender(sheet, imgOptions);
            render.toImage(0, outDir);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

PPT生成预览图片

import com.aspose.slides.ISlide;
import com.aspose.slides.License;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;

public class PptToPDF {

    public static boolean getLicense() {
        boolean result = false;
        try {
            InputStream is = PptToPDF.class.getClassLoader().getResourceAsStream("license.xml");
            License aposeLic = new License();
            aposeLic.setLicense(is);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /** ppt转图片 */
    public static void ppt2Img(String inPath, String outDir){
        try {
            if (!getLicense()) {
                throw new Exception("com.aspose.ppt lic ERROR!");
            }
            // ppt文档
            Presentation pres = new Presentation(inPath);
            ISlide slide = pres.getSlides().get_Item(0);
            int height = (int)(pres.getSlideSize().getSize().getHeight()-150);
            int width = (int)(pres.getSlideSize().getSize().getWidth()-150);
            BufferedImage image = slide.getThumbnail(new java.awt.Dimension(width, height));
            File outImage = new File(outDir);
            ImageIO.write(image, "png", outImage);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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