package com.aiait.base.util;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.aiait.base.service.impl.base.SearchServiceImpl;
import org.apache.pdfbox.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.text.DecimalFormat;
import java.util.Date;
import javax.imageio.ImageIO;
import org.apache.commons.lang3.StringUtils;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class PDFUtil {
// logger
private static final Logger lOGGER = LoggerFactory.getLogger(PDFUtil.class);
public static void main(String[] args) {
// pdfTojpg("C://Test//eClaimPDF//1//Others.pdf","C://Test//eClaimPDF//WrittenConfirmation.jpg");
Date timeDiffE = null;
Date timeDiffL = null;
timeDiffE = new Date();
base64PdfToJpg(pdfBase64);
timeDiffL = new Date();
lOGGER.info("base64PdfToJpg use time: " + getDiffTime(timeDiffL, timeDiffE) + "s");
}
private static String base64PdfToJpg(String base64Pdf) {
String jpg_base64 = null;
int pdfdpi = 400;
BASE64Decoder decoder = new BASE64Decoder();
byte[] pdf_bytes = null;
try {
pdf_bytes = decoder.decodeBuffer(base64Pdf);
} catch (IOException e1) {
e1.printStackTrace();
}
try (final PDDocument document = PDDocument.load(pdf_bytes)) {
?int size = document.getNumberOfPages();
?
?/*圖像合並使用參數*/
?// 定義寬度
?int width = 0;
?// 保存壹張圖片中的RGB數據
?int[] singleImgRGB;
?// 定義高度，後面用於疊加
?int shiftHeight = 0;
?//保存每張圖片的像素值
?BufferedImage imageResult = null;
?// 利用PdfBox生成圖像
?PDDocument pdDocument = document;
?PDFRenderer renderer = new PDFRenderer(pdDocument);
?/*根據總頁數, 按照50頁生成壹張長圖片的邏輯, 進行拆分*/
?// 每50頁轉成1張圖片
?int pageLength = size;? //有多少轉多少
?// 總計循環的次數
?int totalCount = pdDocument.getNumberOfPages() / pageLength + 1;
?for (int m = 0; m < totalCount; m++) {
?for (int i = 0; i < pageLength; i++) {
?int pageIndex = i + (m * pageLength);
?if (pageIndex == pdDocument.getNumberOfPages()) {
?System.out.println("m = " + m);
?break;
?}
?// 96為圖片的dpi，dpi越大，則圖片越清晰，圖片越大，轉換耗費的時間也越多
?BufferedImage image = renderer.renderImageWithDPI(pageIndex, 106, ImageType.RGB);
?int imageHeight = image.getHeight();
?int imageWidth = image.getWidth();
?if (i == 0) {
?//計算高度和偏移量
?//使用第壹張圖片寬度;
?width = imageWidth;
?// 保存每頁圖片的像素值
?// 加個判斷：如果m次循環後所剩的圖片總數小於pageLength，則圖片高度按剩余的張數繪制，否則會出現長圖片下面全是黑色的情況
?if ((pdDocument.getNumberOfPages() - m * pageLength) < pageLength) {
?imageResult = new BufferedImage(width, imageHeight * (pdDocument.getNumberOfPages() - m * pageLength), BufferedImage.TYPE_INT_RGB);
?} else {
?imageResult = new BufferedImage(width, imageHeight * pageLength, BufferedImage.TYPE_INT_RGB);
?}
?} else {
?// 將高度不斷累加
?shiftHeight += imageHeight;
?}
?singleImgRGB = image.getRGB(0, 0, width, imageHeight, null, 0, width);
?imageResult.setRGB(0, shiftHeight, width, imageHeight, singleImgRGB, 0, width);
?}
// ?System.out.println("m = " + m);
?File outFile = new File("C://Test//eClaimPDF//WrittenConfirmation.png");
?System.out.println(outFile.getName());
?// 寫圖片
?ImageIO.write(imageResult, "png", outFile);
?// 這個很重要，下面會有說明
?shiftHeight = 0;
?}
?pdDocument.close();
? ByteArrayOutputStream baos = new ByteArrayOutputStream();//io流
? ImageIO.write(imageResult, "png", baos);//寫入流中?
? byte[] jpg_Bytes = baos.toByteArray();//轉換成字節?
? BASE64Encoder encoder = new BASE64Encoder();
? jpg_base64 = encoder.encodeBuffer(jpg_Bytes).trim();//轉換成base64串
? jpg_base64 = jpg_base64.replaceAll("\n", "").replaceAll("\r", "");//刪除 \r\n
?
//? System.out.println("值為："+"data:image/jpg;base64,"+jpg_base64);
?
} catch (Exception e) {
e.printStackTrace();
}
return "data:image/jpg;base64,"+jpg_base64;
}
// private static String base64PdfToJpg(String base64Pdf) {
// String jpg_base64 = null;
// int pdfdpi = 400;
//
// BASE64Decoder decoder = new BASE64Decoder();
// byte[] pdf_bytes = null;
// try {
// pdf_bytes = decoder.decodeBuffer(base64Pdf);
// } catch (IOException e1) {
// e1.printStackTrace();
// }
//
// try (final PDDocument document = PDDocument.load(pdf_bytes)) {
// int size = document.getNumberOfPages();
// for (int i = 0; i < size; i++) {
// BufferedImage image = new PDFRenderer(document).renderImageWithDPI(i, pdfdpi, ImageType.RGB);
// BufferedImage image = new PDFRenderer(document).
//
// ? ByteArrayOutputStream baos = new ByteArrayOutputStream();//io流
// ? ImageIO.write(image, "jpg", baos);//寫入流中?
// ? byte[] jpg_Bytes = baos.toByteArray();//轉換成字節?
// ? BASE64Encoder encoder = new BASE64Encoder();
// ? jpg_base64 = encoder.encodeBuffer(jpg_Bytes).trim();//轉換成base64串
// ? jpg_base64 = jpg_base64.replaceAll("\n", "").replaceAll("\r", "");//刪除 \r\n
// ?
// ? System.out.println("值為："+"data:image/jpg;base64,"+jpg_base64);
// ?
// }
// } catch (Exception e) {
// e.printStackTrace();
// }
// return "data:image/jpg;base64,"+jpg_base64;
// }
private static void pdfTojpg(String pdfFilePath, String jpgFilePath) {
File pdfFile = new File(pdfFilePath);
int idx = jpgFilePath.lastIndexOf('.');
String jpgprefix = StringUtils.substring(jpgFilePath, 0, idx);
int pdfdpi = 400;
BASE64Decoder decoder = new BASE64Decoder();
byte[] bytes = null;
try {
bytes = decoder.decodeBuffer(pdfBase64);
} catch (IOException e1) {
e1.printStackTrace();
}
// ? try (final PDDocument document = PDDocument.load(pdfFile, "")) {try (final PDDocument document = PDDocument.load(bytes)) {
int size = document.getNumberOfPages();
for (int i = 0; i < size; i++) {
BufferedImage image = new PDFRenderer(document).renderImageWithDPI(i, pdfdpi, ImageType.RGB);
/*
* ByteArrayOutputStream baos = new ByteArrayOutputStream();//io流
* ImageIO.write(image, "jpg", baos);//寫入流中 byte[] imgBytes =
* baos.toByteArray();//轉換成字節 BASE64Encoder encoder = new BASE64Encoder();
* String png_base64 = encoder.encodeBuffer(imgBytes).trim();//轉換成base64串
* png_base64 = png_base64.replaceAll("\n", "").replaceAll("\r", "");//刪除 \r\n
*?
* System.out.println("值為："+"data:image/jpg;base64,"+png_base64);
*/
File jpgFile = new File(jpgprefix + "_" + i + ".jpg");
ImageIO.write(image, "jpg", jpgFile);
}
} catch (Exception e) {
e.printStackTrace();
}
}
private static Double getDiffTime(Date lateTime, Date earlyTime) {
DecimalFormat df=new DecimalFormat("0.00");//設置保留位數
return Double.valueOf(df.format((double)(lateTime.getTime() - earlyTime.getTime()) / 1000));
}
public static String pdfBase64 = "***" //from web?網頁鏈接, upload a PDF to get the base64 string? (Base64 - Online Base64 decoder and encoder)
}