aspose.pdf 轉 圖片

package com.demo;

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


import com.aspose.pdf.Document;
import com.aspose.pdf.License;
import com.aspose.pdf.devices.JpegDevice;
import com.aspose.pdf.devices.Resolution;

/**
 * 
 * 因爲ASPOSE比較吃內存，操做大一點的文件就會堆溢出，因此請先設置好java虛擬機參數：-Xms1024m -Xmx1024m(參kao值)<br>
 * 
 * @author Spark
 *
 */
public class TestPdf {

    private static InputStream license;
    private static InputStream pdf;

    public static void main(String[] args) {
    	pdfToImage();
	}
    
    /**
     * 獲取license
     * 
     * @return
     */
    public static boolean getLicense() {
        boolean result = false;
        try {
            license = TestPdf.class.getClassLoader().getResourceAsStream("\\license.xml");// license路徑
            pdf = TestPdf.class.getClassLoader().getResourceAsStream("\\人人都是產品經理.pdf");// 原始pdf路徑
            License aposeLic = new License();
            aposeLic.setLicense(license);
            result = true;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    
    public static void pdfToImage(){
    	// 驗證License
        if (!getLicense()) {
            return;
        }

        try {
            long old = System.currentTimeMillis();
            System.out.println("begin..............");
            Document pdfDocument = new Document(pdf);
           	//圖片寬度：800
            //圖片高度：100
            // 分辨率 130
           	//Quality [0-100] 最大100
            //例： new JpegDevice(800, 1000, resolution, 90);
            Resolution resolution = new Resolution(130);
            JpegDevice jpegDevice = new JpegDevice(resolution);
            for (int index=1;index<=pdfDocument.getPages().size();index++) {
            	File file = new File("D:\\a\\test"+index+".jpg");// 輸出路徑
                FileOutputStream fileOS = new FileOutputStream(file);
                jpegDevice.process(pdfDocument.getPages().get_Item(index), fileOS);
                fileOS.close();
			}
            
            long now = System.currentTimeMillis();
            System.out.println("共耗時：" + ((now - old) / 1000.0) + "秒");
        } catch (Exception e) {
            e.printStackTrace();
        }
    	
        
    }
   
}