ICEpdf转换pdf文件为图片

àì夳堔傛蜴生んèń 2022-05-29 10:51 336阅读 0赞

ICEpdf版本为：6.3.0

1.转换代码如下：

package com.icepdf;
    
    import java.awt.image.BufferedImage;
    import java.awt.image.RenderedImage;
    import java.io.File;
    import javax.imageio.ImageIO;
    import org.icepdf.core.pobjects.Document;
    import org.icepdf.core.pobjects.Page;
    import org.icepdf.core.util.GraphicsRenderingHints;
    
    public class Pdf2ImgUtil {
    	public static void main(String[] args){
    		String filePath="G:/BaiduYunDownload/ce.pdf";
    		Document document=new Document();
    		try{
    			document.setFile(filePath);
    			float scale=1.0f; //缩放比例
    			float rotation=0f; //旋转角度  
    			for(int i=0;i<document.getNumberOfPages();i++){
    				BufferedImage image=(BufferedImage)document.getPageImage(i,
    						GraphicsRenderingHints.SCREEN,Page.BOUNDARY_CROPBOX,
    						rotation,scale);
    				RenderedImage rendImage=image;
    				File file=new File("G:/BaiduYunDownload/icepdf_"+i+".jpg");
    				// 这里png作用是：格式是jpg但有png清晰度  
    				ImageIO.write(rendImage,"png",file);
    				image.flush();  
                }
    			document.dispose();
    		}
    		catch(Exception e){
    			System.out.println(e.getMessage());
    			e.printStackTrace();
    		}
    		System.out.println("======================完成============================");
    	}
    }

去除ICEpdf转换后图片上的水印，需要把下面两个类增加到自己的项目中去。

1.ProductInfo，包名固定为org.icepdf.core.application，代码如下：

package org.icepdf.core.application;
    
    public class ProductInfo {
    	/**
         * The company that owns this product.
         */
        public static String COMPANY = "ICEsoft Technologies, Inc.";
    
        /**
         * The name of the product.
         */
        public static String PRODUCT = "ICEpdf";
    
        /**
         * The 3 levels of version identification, e.g. 1.0.0.
         */
        public static String VERSION = "6.3.0";
    
        /**
         * The release type of the product (alpha, beta, production).
         */
        public static String RELEASE_TYPE = "";
    
        /**
         * The build number.  Typically this would be tracked and maintained
         * by the build system (i.e. Ant).
         */
        public static String BUILD_NO = "19";
    
        /**
         * The revision number retrieved from the repository for this build.
         * This is substitued automatically by subversion.
         */
        public static String REVISION = "49267";
    
        public String toString(){
            StringBuilder info = new StringBuilder();
            info.append( "\n" );
            info.append( COMPANY );
            info.append( "\n" );
            info.append( PRODUCT );
            info.append( " " );
            info.append(VERSION);
            info.append( " " );
            info.append( RELEASE_TYPE );
            info.append( "\n" );
            info.append( "Build number: " );
            info.append( BUILD_NO );
            info.append( "\n" );
            info.append( "Revision: " );
            info.append( REVISION );
            info.append( "\n" );
            return info.toString();
        }
    
        public String getVersion(){
            StringBuilder info = new StringBuilder();
            //info.append(VERSION);
            //info.append( " " );
            //info.append( RELEASE_TYPE );
            return info.toString();
        }
    
        public static void main(String[] args) {
            ProductInfo app = new ProductInfo();
            System.out.println( app.toString() );
        }
    }

2.Padding，包名固定为：org.icepdf.core.pobjects.graphics，代码如下：

package org.icepdf.core.pobjects.graphics;
    
    import java.awt.Color;
    import java.awt.Font;
    import java.awt.FontMetrics;
    import java.awt.Graphics2D;
    import java.awt.geom.Rectangle2D;
    import org.icepdf.core.application.ProductInfo;
    
    public class Padding {
    	/*
    	private static byte[] padding1 = { (byte) 0x36, (byte) 0x30, (byte) 0x32,
    			(byte) 0x5D, (byte) 0x51, (byte) 0x53, (byte) 0xD };
    	*/
    	private static byte[] padding1={};
    	/*
    	private static byte[] padding3 = { (byte) 0x33, (byte) 0x5C, (byte) 0x5F,
    			(byte) 0xD, (byte) 0x32, (byte) 0x63, (byte) 0x4E, (byte) 0x59,
    			(byte) 0x62, (byte) 0x4E, (byte) 0x61, (byte) 0x56, (byte) 0x5C,
    			(byte) 0x5B, (byte) 0xD, (byte) 0x3D, (byte) 0x62, (byte) 0x5F,
    			(byte) 0x5D, (byte) 0x5C, (byte) 0x60, (byte) 0x52, (byte) 0x60,
    			(byte) 0xD, (byte) 0x3C, (byte) 0x5B, (byte) 0x59, (byte) 0x66 };
    	*/
    	private static byte[] padding3={};
    	static {
    		// add offset
    		for (int i = 0; i < padding1.length; i++) {
    			padding1[i] += (byte) 0x13;
    		}
    		for (int i = 0; i < padding3.length; i++) {
    			padding3[i] += (byte) 0x13;
    		}
    	}
    
    	public static final void getPadding(final Graphics2D g2,
    			final Rectangle2D.Float mediaBox) {
    
    		// setup painting parameters
    		g2.scale(1, -1);
    		g2.setColor(new Color(186, 0, 0));
    
    		// setup strings for drawing water marks
    		String version = new ProductInfo().getVersion();
    
    		String headerText = new String(padding1) + version;
    		String footerText = new String(padding3);
    		int marginPadding = 5; // margin padding
    
    		// draw footer
    		g2.setFont(new Font("Dialog", Font.BOLD, 14));
    		FontMetrics fontMetrics = g2.getFontMetrics();
    		Rectangle2D fontBounds = fontMetrics.getStringBounds(
    				footerText.toCharArray(), 0, footerText.length(), g2);
    		int x = (int) (mediaBox.x + (mediaBox.width - fontBounds.getWidth()) / 2.0);
    		int y = -1
    				* (int) (mediaBox.getY() - mediaBox.getHeight() + marginPadding);
    		g2.drawString(footerText, x, y);
    
    		// draw header
    		fontBounds = fontMetrics.getStringBounds(headerText.toCharArray(), 0,
    				headerText.length(), g2);
    		x = (int) (mediaBox.x + (mediaBox.width - fontBounds.getWidth()) / 2.0);
    		y = -1 * (int) (mediaBox.y - fontBounds.getHeight() - marginPadding);
    		g2.drawString(headerText, x, y);
    
    	}
    }

效果如下图所示：

带水印：

![Image 1][]

去除水印：

![Image 1][]

[Image 1]: