pdf报告A4切割A5
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jiangs
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6f0262ad04
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dd30506fe9
@ -75,6 +75,12 @@
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<artifactId>spring-boot-starter-websocket</artifactId>
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</dependency>
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<dependency>
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<groupId>org.apache.pdfbox</groupId>
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<artifactId>pdfbox</artifactId>
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</dependency>
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</dependencies>
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@ -0,0 +1,114 @@
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package com.czlis.interfaceCommon.utils;
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import org.apache.pdfbox.pdmodel.PDDocument;
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import org.apache.pdfbox.pdmodel.PDPage;
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import org.apache.pdfbox.pdmodel.PDPageContentStream;
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import org.apache.pdfbox.pdmodel.common.PDRectangle;
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import org.apache.pdfbox.multipdf.LayerUtility;
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import org.apache.pdfbox.pdmodel.graphics.form.PDFormXObject;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.util.Base64;
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public class PdfPaperConverter {
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private static final float A4_WIDTH = 595f; // A4标准宽度（pt）
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private static final float A4_HEIGHT = 842f; // A4标准高度（pt）
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private static final float A5_HEIGHT = 420f; // A5高度（保留A4宽度）
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private static final float TOLERANCE = 10f; // 尺寸判断容差
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// 新增：粗略判断Base64 PDF是A4还是A5（高度> A5_HEIGHT即视为A4）
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public static boolean isBase64PdfA4(String base64Pdf) {
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if (base64Pdf == null || base64Pdf.trim().isEmpty()) {
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return false; // 空字符串直接返回非A4
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}
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byte[] pdfBytes = null;
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try {
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// 尝试解码Base64（失败则视为非A4）
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pdfBytes = cn.hutool.core.codec.Base64.decode(base64Pdf);
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} catch (Exception e) {
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return false;
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}
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try (PDDocument doc = PDDocument.load(new ByteArrayInputStream(pdfBytes))) {
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if (doc.getNumberOfPages() == 0) {
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return false; // 无页面视为非A4
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}
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// 获取第一页高度（粗略判断：大于A5高度即认为是A4）
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PDPage firstPage = doc.getPage(0);
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float pageHeight = firstPage.getMediaBox().getHeight();
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return pageHeight > A5_HEIGHT; // 核心判断逻辑
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} catch (Exception e) {
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// PDF损坏、加载失败等异常，均视为非A4（粗略判断容错）
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return false;
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}
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}
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public static String convertBase64PdfToA5IfConfigured(String base64Pdf, String configuredSize) throws Exception {
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if ("A4".equalsIgnoreCase(configuredSize)) {
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return base64Pdf;
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}
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byte[] pdfBytes = cn.hutool.core.codec.Base64.decode(base64Pdf);
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try (PDDocument originalDoc = PDDocument.load(new ByteArrayInputStream(pdfBytes))) {
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if (originalDoc.getNumberOfPages() == 0) {
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return base64Pdf; // 空文档直接返回
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}
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PDPage firstPage = originalDoc.getPage(0);
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PDRectangle mediaBox = firstPage.getMediaBox();
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boolean isA4 = isClose(mediaBox.getWidth(), A4_WIDTH) && isClose(mediaBox.getHeight(), A4_HEIGHT);
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if (isA4) {
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return cropA4ToA5(originalDoc); // 仅A4文档执行裁剪
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}
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return base64Pdf;
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}
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}
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private static boolean isClose(float a, float b) {
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return Math.abs(a - b) <= TOLERANCE;
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}
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private static String cropA4ToA5(PDDocument originalDoc) throws Exception {
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try (PDDocument newDoc = new PDDocument()) {
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for (int i = 0; i < originalDoc.getNumberOfPages(); i++) {
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cropPage(originalDoc, newDoc, i);
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}
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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newDoc.save(baos);
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return Base64.getEncoder().encodeToString(baos.toByteArray());
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}
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}
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// 最终终极适配：2.0.29两参数importPageAsForm + 平移 + 双框同步，无空白、不切顶
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private static void cropPage(PDDocument sourceDoc, PDDocument targetDoc, int pageIndex) throws Exception {
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PDPage sourcePage = sourceDoc.getPage(pageIndex);
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PDRectangle sourceMediaBox = sourcePage.getMediaBox();
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float targetWidth = sourceMediaBox.getWidth(); // 保留A4原宽度
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float targetHeight = A5_HEIGHT; // A5高度
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float yOffset = -(A4_HEIGHT - targetHeight); // 向下平移距离（关键：让上半部分落入可视区）
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// 1. 新建A5页面：同步设置mediaBox（物理尺寸）和cropBox（可视区），避免空白
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PDPage targetPage = new PDPage();
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PDRectangle targetBox = new PDRectangle(0f, 0f, targetWidth, targetHeight);
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targetPage.setMediaBox(targetBox);
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targetPage.setCropBox(targetBox);
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targetDoc.addPage(targetPage);
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// 2. 2.0.29兼容：仅用两参数导入整个原页面
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LayerUtility layerUtil = new LayerUtility(targetDoc);
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PDFormXObject form = layerUtil.importPageAsForm(sourceDoc, pageIndex); // 仅两个参数，2.0.29支持
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// 3. 平移绘制：让原页面上半部分显示在新页面中
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try (PDPageContentStream contentStream = new PDPageContentStream(targetDoc, targetPage)) {
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// cm指令：向下平移247pt（A4_HEIGHT - A5_HEIGHT），原页面上半部分（247~842pt）对应新页面（0~595pt）
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contentStream.appendRawCommands(String.format("1 0 0 1 0 %.2f cm\n", yOffset));
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contentStream.drawForm(form);
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}
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}
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}
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8
pom.xml
8
pom.xml
@ -45,6 +45,7 @@
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<itext.version>2.1.7</itext.version>
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<barbecue.version>1.5-beta1</barbecue.version>
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<itextpdf.version>7.2.5</itextpdf.version>
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<pdfbox.version>2.0.29</pdfbox.version>
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<!-- override dependency version -->
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<tomcat.version>9.0.112</tomcat.version>
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@ -358,6 +359,13 @@
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<version>${itextpdf.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.pdfbox</groupId>
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<artifactId>pdfbox</artifactId>
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<version>${pdfbox.version}</version>
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</dependency>
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</dependencies>
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@ -1,20 +1,17 @@
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package com.czlis.zybgcx.service.impl;
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import cn.hutool.core.codec.Base64;
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import cn.hutool.core.date.DateTime;
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import cn.hutool.core.date.DateUtil;
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import cn.hutool.core.io.FileUtil;
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import cn.hutool.core.io.IoUtil;
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import cn.hutool.core.util.StrUtil;
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import com.czlis.common.config.RuoYiConfig;
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import com.czlis.common.core.domain.Result;
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import com.czlis.common.core.domain.entity.lis.LabPat;
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import com.czlis.common.core.domain.entity.lis.LabReqreportPdffile;
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import com.czlis.common.utils.file.FileUtils;
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import com.czlis.common.utils.ip.IpUtils;
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import com.czlis.common.utils.uuid.UUID;
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import com.czlis.interfaceCommon.utils.CommonUtil;
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import com.czlis.interfaceCommon.utils.LisUtil;
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import com.czlis.interfaceCommon.utils.PdfPaperConverter;
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import com.czlis.interfaceCommon.utils.ReportUtil;
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import com.czlis.zybgcx.mapper.ZybgcxMapper;
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import com.czlis.zybgcx.pojo.Web_fs_printReport;
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@ -24,13 +21,10 @@ import com.czlis.zybgcx.pojo.Web_result;
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import com.czlis.zybgcx.service.ZybgcxService;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Service;
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import org.springframework.web.bind.annotation.CrossOrigin;
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import javax.print.PrintException;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.*;
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import java.util.stream.Collectors;
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@ -106,6 +100,20 @@ public class ZybgcxServcieImpl implements ZybgcxService {
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//过滤A5格式报告单
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List<Map<String, Object>> collectA5 = bgdhBase64List.stream().filter(bgdhBase64 -> bgdhBase64.get("pageType").equals("A5")).collect(Collectors.toList());
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//其中有可能格式虽然是A5，实际尺寸是A4，需要进行处理
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for (Map<String, Object> stringObjectMap : collectA5) {
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String bas64Str = stringObjectMap.get("data").toString();
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if(!PdfPaperConverter.isBase64PdfA4(bas64Str)) continue;
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try {
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String base64_A5 = PdfPaperConverter.convertBase64PdfToA5IfConfigured(bas64Str, "A5");
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stringObjectMap.put("data", base64_A5);
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} catch (Exception e) {
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log.error("裁剪pdf出错：",e);
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return new Result("0","裁剪pdf出错！"+e.getMessage());
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}
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}
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log.info("collectA5:"+collectA5);
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//对A5格式的报告单进行排序
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collectA5.sort(new Comparator<Map<String, Object>>() {
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