pdf文件压缩

pdf文件压缩

添加依赖

<dependency>
    <groupId>com.luhuiguo</groupId>
    <artifactId>aspose-pdf</artifactId>
    <version>23.1</version>
</dependency>

public class OptimizePdf {

    public static void optimize(String source, String target) {
        Document doc = new Document(source);
        //设置压缩属性
        OptimizationOptions opt = new OptimizationOptions();
        //删除PDF不必要的对象
        opt.setRemoveUnusedObjects(true);
        //链接重复流
        opt.setLinkDuplcateStreams(false);
        //删除未使用的流
        opt.setRemoveUnusedStreams(false);
        //删除不必要的字体
        opt.setUnembedFonts(true);
        //压缩PDF中的图片
        opt.getImageCompressionOptions().setCompressImages(true);
        //图片压缩比， 0 到100可选，越低压缩比越大
        opt.getImageCompressionOptions().setImageQuality(50);
        doc.optimizeResources(opt);
        //优化web的PDF文档
        doc.optimize();
        doc.save(target);
    }

    public static void main(String[] args) {
        String source = "/Users/zhanghe/Desktop/2.pdf";
        String target = "/Users/zhanghe/Desktop/1.pdf";
        optimize(source, target);
    }
}