Java PDF转图片 完美方案 绝对可用

package com; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.Iterator; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage; import org.apache.pdfbox.pdmodel.common.PDRectangle; import org.apache.pdfbox.rendering.ImageType; import org.apache.pdfbox.rendering.PDFRenderer; import org.apache.pdfbox.tools.imageio.ImageIOUtil; public class PDFUtil { /** * * @param pdfFile * PDF文件 * @param imgPath * 图片存储路径 * @param imgName * 图片存储文件名 * @param imgType * 图片存储类型 * @param dpi * 转换精度，建议100左右 * @return 是否成功 * @throws IOException */ public static boolean PDFToImg(File pdfFile, String imgPath, String imgName, String imgType, int dpi) throws IOException { String color = "rgb"; int startPage = 1; // 目前只支持转换一页PDF，endPage限制最多转换页数 // 如果有多页，需要调整文件名逻辑 int endPage = 1; float cropBoxLowerLeftX = 0.0F; float cropBoxLowerLeftY = 0.0F; float cropBoxUpperRightX = 0.0F; float cropBoxUpperRightY = 0.0F; PDDocument pdDocument = null; try { pdDocument = PDDocument.load(pdfFile); ImageType imageType = null; if ("bilevel".equalsIgnoreCase(color)) { imageType = ImageType.BINARY; } else if ("gray".equalsIgnoreCase(color)) { imageType = ImageType.GRAY; } else if ("rgb".equalsIgnoreCase(color)) { imageType = ImageType.RGB; } else if ("rgba".equalsIgnoreCase(color)) { imageType = ImageType.ARGB; } if (imageType == null) { return false; } if (cropBoxLowerLeftX != 0.0F || cropBoxLowerLeftY != 0.0F || cropBoxUpperRightX != 0.0F || cropBoxUpperRightY != 0.0F) { changeCropBox(pdDocument, cropBoxLowerLeftX, cropBoxLowerLeftY, cropBoxUpperRightX, cropBoxUpperRightY); } boolean success = true; endPage = Math.min(endPage, pdDocument.getNumberOfPages()); PDFRenderer renderer = new PDFRenderer(pdDocument); // 目前只支持转换一页PDF // 如果有多页，需要调整文件名逻辑 for (int endTime = startPage - 1; endTime < endPage; ++endTime) { BufferedImage image = renderer.renderImageWithDPI(endTime, (float) dpi, imageType); String duration = imgPath + imgName + "." + imgType; System.out.println("PDF图片生成路径" + duration); success &= ImageIOUtil.writeImage(image, duration, dpi); } if (!success) { System.out.println("Error: no writer found for image format \'" + imgType + "\'"); return false; } } catch (Exception ex) { ex.printStackTrace(); } finally { if (pdDocument != null) { pdDocument.close(); } } return true; } private static void changeCropBox(PDDocument document, float a, float b, float c, float d) { Iterator<PDPage> i$ = document.getPages().iterator(); while (i$.hasNext()) { PDPage page = (PDPage) i$.next(); PDRectangle rectangle = new PDRectangle(); rectangle.setLowerLeftX(a); rectangle.setLowerLeftY(b); rectangle.setUpperRightX(c); rectangle.setUpperRightY(d); page.setCropBox(rectangle); } } }