poi根据模版生成多页word,并压缩下载
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前端时间公司有个项目,需求大致是这样的——根据word模版,生成带学生照片的信息表格。如果是批量打印,则生成一个word文档,每个学生占用一页。
在实现时,参考了两位老哥的代码:
poi替换word模板内容 并且合并生成多页的word 实现分页。
先上工具类的代码:
import org.apache.poi.xwpf.usermodel.*; import javax.servlet.http.HttpServletResponse; import java.io.*; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; public class WordUtils { /** * 根据模板生成word * * @param path 模板的路径 * @param params 需要替换的参数 * @param tableList 需要插入的参数 * @param fileName 生成word文件的文件名 * @param response */ public void getWord(String path, Map<String, Object> params, List<String[]> tableList, String fileName, HttpServletResponse response) throws Exception { File file = new File(path); InputStream is = new FileInputStream(file); CustomXWPFDocument doc = new CustomXWPFDocument(is); this.replaceInPara(doc, doc, params); //替换文本里面的变量 this.replaceInTable(doc, doc, params, tableList); //替换表格里面的变量 OutputStream os = response.getOutputStream(); response.setHeader("Content-disposition", "attachment; filename=" + fileName); doc.write(os); this.close(os); this.close(is); } /** * 替换段落里面的变量 * * @param doc 要替换的文档 * @param params 参数 */ public void replaceInPara(CustomXWPFDocument firstDoc, CustomXWPFDocument doc, Map<String, Object> params) { Iterator<XWPFParagraph> iterator = doc.getParagraphsIterator(); XWPFParagraph para; while (iterator.hasNext()) { para = iterator.next(); this.replaceInPara(firstDoc, para, params, doc); } } /** * 替换段落里面的变量 * * @param para 要替换的段落 * @param params 参数 */ private void replaceInPara(CustomXWPFDocument firstDoc, XWPFParagraph para, Map<String, Object> params, CustomXWPFDocument doc) { List<XWPFRun> runs; Matcher matcher; if (this.matcher(para.getParagraphText()).find()) { runs = para.getRuns(); int start = -1; int end = -1; String str = ""; for (int i = 0; i < runs.size(); i++) { XWPFRun run = runs.get(i); String runText = run.toString(); if (‘$‘ == runText.charAt(0) && ‘{‘ == runText.charAt(1)) { start = i; } if ((start != -1)) { str += runText; } if (‘}‘ == runText.charAt(runText.length() - 1)) { if (start != -1) { end = i; break; } } } for (int i = start; i <= end; i++) { para.removeRun(i); i--; end--; } for (Map.Entry<String, Object> entry : params.entrySet()) { String key = entry.getKey(); if (str.indexOf(key) != -1) { Object value = entry.getValue(); if (value instanceof String) { str = str.replace(key, value.toString()); para.createRun().setText(str, 0); break; } else if (value instanceof Map) { str = str.replace(key, ""); Map pic = (Map) value; int width = Integer.parseInt(pic.get("width").toString()); int height = Integer.parseInt(pic.get("height").toString()); int picType = getPictureType(pic.get("type").toString()); byte[] byteArray = (byte[]) pic.get("content"); ByteArrayInputStream byteInputStream = new ByteArrayInputStream(byteArray); try { String ind = firstDoc.addPictureData(byteInputStream, picType); int id = firstDoc.getNextPicNameNumber(picType); firstDoc.createPicture(ind, id, width, height, para); // 由于图片重复则显示错误,重写create方法 // firstDoc.addPictureData(byteInputStream, picType); // firstDoc.createPicture(firstDoc.getAllPictures().size() - 1, width, height, para, firstDoc); para.createRun().setText(str, 0); break; } catch (Exception e) { e.printStackTrace(); } } } } } } /** * 为表格插入数据,行数不够添加新行 * * @param table 需要插入数据的表格 * @param tableList 插入数据集合 */ private static void insertTable(XWPFTable table, List<String[]> tableList) { //创建行,根据需要插入的数据添加新行,不处理表头 for (int i = 0; i < tableList.size(); i++) { XWPFTableRow row = table.createRow(); } //遍历表格插入数据 List<XWPFTableRow> rows = table.getRows(); int length = table.getRows().size(); for (int i = 1; i < length - 1; i++) { XWPFTableRow newRow = table.getRow(i); List<XWPFTableCell> cells = newRow.getTableCells(); for (int j = 0; j < cells.size(); j++) { XWPFTableCell cell = cells.get(j); String s = tableList.get(i - 1)[j]; cell.setText(s); } } } /** * 替换表格里面的变量 * * @param doc 要替换的文档 * @param params 参数 */ public void replaceInTable(CustomXWPFDocument firstDoc, CustomXWPFDocument doc, Map<String, Object> params, List<String[]> tableList) { Iterator<XWPFTable> iterator = doc.getTablesIterator(); XWPFTable table; List<XWPFTableRow> rows; List<XWPFTableCell> cells; List<XWPFParagraph> paras; while (iterator.hasNext()) { table = iterator.next(); if (table.getRows().size() > 1) { //判断表格是需要替换还是需要插入,判断逻辑有$为替换,表格无$为插入 if (this.matcher(table.getText()).find()) { rows = table.getRows(); for (XWPFTableRow row : rows) { cells = row.getTableCells(); for (XWPFTableCell cell : cells) { paras = cell.getParagraphs(); for (XWPFParagraph para : paras) { this.replaceInPara(firstDoc, para, params, doc); } } } } else { insertTable(table, tableList); //插入数据 } } } } /** * 正则匹配字符串 * * @param str * @return */ private Matcher matcher(String str) { Pattern pattern = Pattern.compile("\\\\$\\\\{(.+?)\\\\}", Pattern.CASE_INSENSITIVE); Matcher matcher = pattern.matcher(str); return matcher; } /** * 根据图片类型,取得对应的图片类型代码 * * @param picType * @return int */ public int getPictureType(String picType) { int res = CustomXWPFDocument.PICTURE_TYPE_PICT; if (picType != null) { if (picType.equalsIgnoreCase("png")) { res = CustomXWPFDocument.PICTURE_TYPE_PNG; } else if (picType.equalsIgnoreCase("dib")) { res = CustomXWPFDocument.PICTURE_TYPE_DIB; } else if (picType.equalsIgnoreCase("emf")) { res = CustomXWPFDocument.PICTURE_TYPE_EMF; } else if (picType.equalsIgnoreCase("jpg") || picType.equalsIgnoreCase("jpeg")) { res = CustomXWPFDocument.PICTURE_TYPE_JPEG; } else if (picType.equalsIgnoreCase("wmf")) { res = CustomXWPFDocument.PICTURE_TYPE_WMF; } } return res; } /** * 将输入流中的数据写入字节数组 * * @param in * @return */ public static byte[] inputStream2ByteArray(InputStream in, boolean isClose) { byte[] byteArray = null; try { int total = in.available(); byteArray = new byte[total]; in.read(byteArray); } catch (IOException e) { e.printStackTrace(); } finally { if (isClose) { try { in.close(); } catch (Exception e2) { e2.getStackTrace(); } } } return byteArray; } /** * 关闭输入流 * * @param is */ public void close(InputStream is) { if (is != null) { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * 关闭输出流 * * @param os */ public void close(OutputStream os) { if (os != null) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * @Description: 保存图片(用来插入) * @Param: * @return: * @Author: lgc * @Date: 2019/4/24 */ public byte[] readInputStream(InputStream inStream) throws Exception { ByteArrayOutputStream outStream = new ByteArrayOutputStream(); //创建一个Buffer字符串 byte[] buffer = new byte[1024]; //每次读取的字符串长度,如果为-1,代表全部读取完毕 int len = 0; //使用一个输入流从buffer里把数据读取出来 while ((len = inStream.read(buffer)) != -1) { //用输出流往buffer里写入数据,中间参数代表从哪个位置开始读,len代表读取的长度 outStream.write(buffer, 0, len); } //关闭输入流 inStream.close(); //把outStream里的数据写入内存 return outStream.toByteArray(); } }
下面是很多人都提到的poi无法显示bug的解决:
import org.apache.poi.openxml4j.opc.OPCPackage; import org.apache.poi.xwpf.usermodel.XWPFDocument; import org.apache.poi.xwpf.usermodel.XWPFParagraph; import org.apache.xmlbeans.XmlException; import org.apache.xmlbeans.XmlToken; import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps; import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D; import org.openxmlformats.schemas.drawingml.x2006.wordprocessingDrawing.CTInline; import java.io.IOException; import java.io.InputStream; public class CustomXWPFDocument extends XWPFDocument { public CustomXWPFDocument(InputStream in) throws IOException { super(in); } public CustomXWPFDocument() { super(); } public CustomXWPFDocument(OPCPackage pkg) throws IOException { super(pkg); } /** * @param id * @param width 宽 * @param height 高 * @param paragraph 段落 */ public void createPicture(int id, int width, int height, XWPFParagraph paragraph, CustomXWPFDocument doc) { final int EMU = 9525; width *= EMU; height *= EMU; String blipId = doc.getAllPictures().get(id).getPackageRelationship().getId(); CTInline inline = paragraph.createRun().getCTR().addNewDrawing().addNewInline(); String picXml = "" + "<a:graphic xmlns:a=\\"http://schemas.openxmlformats.org/drawingml/2006/main\\">" + " <a:graphicData uri=\\"http://schemas.openxmlformats.org/drawingml/2006/picture\\">" + " <pic:pic xmlns:pic=\\"http://schemas.openxmlformats.org/drawingml/2006/picture\\">" + " <pic:nvPicPr>" + " <pic:cNvPr id=\\"" + id + "\\" name=\\"Generated\\"/>" + " <pic:cNvPicPr/>" + " </pic:nvPicPr>" + " <pic:blipFill>" + " <a:blip r:embed=\\"" + blipId + "\\" xmlns:r=\\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\\"/>" + " <a:stretch>" + " <a:fillRect/>" + " </a:stretch>" + " </pic:blipFill>" + " <pic:spPr>" + " <a:xfrm>" + " <a:off x=\\"0\\" y=\\"0\\"/>" + " <a:ext cx=\\"" + width + "\\" cy=\\"" + height + "\\"/>" + " </a:xfrm>" + " <a:prstGeom prst=\\"rect\\">" + " <a:avLst/>" + " </a:prstGeom>" + " </pic:spPr>" + " </pic:pic>" + " </a:graphicData>" + "</a:graphic>"; inline.addNewGraphic().addNewGraphicData(); XmlToken xmlToken = null; try { xmlToken = XmlToken.Factory.parse(picXml); } catch (XmlException xe) { xe.printStackTrace(); } inline.set(xmlToken); CTPositiveSize2D extent = inline.addNewExtent(); extent.setCx(width); extent.setCy(height); CTNonVisualDrawingProps docPr = inline.addNewDocPr(); docPr.setId(id); docPr.setName("图片" + blipId); docPr.setDescr("头像"); } public void createPicture(String blipId, int id, int width, int height, XWPFParagraph paragraph) { final int EMU = 9525; width *= EMU; height *= EMU; //String blipId = getAllPictures().get(id).getPackageRelationship().getId(); CTInline inline = paragraph.createRun().getCTR().addNewDrawing().addNewInline(); String picXml = "" + "<a:graphic xmlns:a=\\"http://schemas.openxmlformats.org/drawingml/2006/main\\">" + " <a:graphicData uri=\\"http://schemas.openxmlformats.org/drawingml/2006/picture\\">" + " <pic:pic xmlns:pic=\\"http://schemas.openxmlformats.org/drawingml/2006/picture\\">" + " <pic:nvPicPr>" + " <pic:cNvPr id=\\"" + id + "\\" name=\\"Generated\\"/>" + " <pic:cNvPicPr/>" + " </pic:nvPicPr>" + " <pic:blipFill>" + " <a:blip r:embed=\\"" + blipId + "\\" xmlns:r=\\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\\"/>" + " <a:stretch>" + " <a:fillRect/>" + " </a:stretch>" + " </pic:blipFill>" + " <pic:spPr>" + " <a:xfrm>" + " <a:off x=\\"0\\" y=\\"0\\"/>" + " <a:ext cx=\\"" + width + "\\" cy=\\"" + height + "\\"/>" + " </a:xfrm>" + " <a:prstGeom prst=\\"rect\\">" + " <a:avLst/>" + " </a:prstGeom>" + " </pic:spPr>" + " </pic:pic>" + " </a:graphicData>" + "</a:graphic>"; inline.addNewGraphic().addNewGraphicData(); XmlToken xmlToken = null; try { xmlToken = XmlToken.Factory.parse(picXml); } catch (XmlException xe) { xe.printStackTrace(); } inline.set(xmlToken); CTPositiveSize2D extent = inline.addNewExtent(); extent.setCx(width); extent.setCy(height); CTNonVisualDrawingProps docPr = inline.addNewDocPr(); docPr.setId(id); docPr.setName("图片" + id); docPr.setDescr("头像"); } }
最后是我自己的实现类代码:
import com.edu.model.InterviewRoomPlay; import com.edu.model.InterviewRoomUser; import com.edu.service.EduInterviewService; import com.yz.controller.BaseController; import com.yz.service.annotation.LoginRequired; import org.apache.commons.lang.StringUtils; import org.apache.poi.xwpf.usermodel.XWPFParagraph; import org.apache.xmlbeans.XmlOptions; import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTBody; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import javax.annotation.Resource; import javax.imageio.ImageIO; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.awt.image.BufferedImage; import java.io.*; import java.net.HttpURLConnection; import java.net.URL; import java.text.SimpleDateFormat; import java.util.*; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; @Controller @RequestMapping("/exportWord") @LoginRequired public class ExportWordController extends BaseController { @Resource private EduInterviewService service; private String ImageHandle = "?imageView2/2/w/120/h/141/q/80"; @RequestMapping("/batch") @ResponseBody public void batch(@RequestParam Integer playId, @RequestParam Integer schoolId, HttpServletResponse response, HttpSession session) throws Exception { //创建压缩包位置 File fileZip = new File("/wordZip"); if (!fileZip.exists()) { fileZip.mkdirs(); } //获得面试间和场次名称 InterviewRoomPlay play = service.getPlayById(playId); String wordName = play.getConfigName() + "-" + play.getName() + "的学生打印表"; String filesPath = "/wordZip/" + new Date().getTime(); //合并模板的个数就是每次要解析多少个当前的模板 ,那么就需要首先定义一个集合 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm"); List<InterviewRoomUser> userList = service.getUserByPlayId(playId); //我用的是2007版本以后poi对word进行解析的docx //首先定义一个XWPFDocument 集合 这个对象可以进行word 解析 合并 还有下载都离不开这个对象 List<CustomXWPFDocument> xwpfDocuments = new ArrayList<>(); //由于合并时将所有图片都存在第一个doc里面,所以定义方便图片传值 CustomXWPFDocument firstDoc = null; //判断需要的参数 Integer sex; Date playStartTime; String filePath = session.getServletContext().getRealPath("/") + "doc/interviewDoc/" + schoolId + ".docx"; //期次我们先解析word模板 替换其中的占位符 int index = 0; Integer handleTime = 1; for (InterviewRoomUser user : userList) { WordUtils wordUtils = new WordUtils(); Map<String, Object> params = new HashMap<>(); playStartTime = user.getPlayStartTime(); sex = user.getSex(); String headImage = user.getHeadImage(); if (StringUtils.isNotEmpty(headImage)) { //替换的图片 String headimg = session.getServletContext().getRealPath("/") + "doc/interviewDoc/head.png"; //new一个URL对象 URL url = new URL(headImage + ImageHandle); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setRequestMethod("GET"); conn.setConnectTimeout(5 * 1000); InputStream inStream = conn.getInputStream(); byte[] data = wordUtils.readInputStream(inStream); File imageFile = new File(headimg); FileOutputStream outStream = new FileOutputStream(imageFile); outStream.write(data); outStream.close(); //图片 InputStream murl = new URL(headImage + ImageHandle).openStream(); BufferedImage sourceImg = ImageIO.read(murl); Map<String, Object> header = new HashMap<>(); header.put("width", sourceImg.getWidth()); header.put("height", sourceImg.getHeight()); header.put("type", wordUtils.getPictureType(headimg)); header.put("content", wordUtils.inputStream2ByteArray(new FileInputStream(headimg), true)); params.put("${headImage}", header); } else { params.put("${headImage}", ""); } params.put("${name}", user.getName()); String idcard = user.getIdcard(); params.put("${idcard}", idcard); if (sex != null) { if (sex == 1) { params.put("${sex}", "男"); } else if (sex == 2) { params.put("${sex}", "女"); } else { params.put("${sex}", ""); } } else { if (!StringUtils.isEmpty(idcard)) { params.put("${sex}", checkSex(idcard)); } else { params.put("${sex}", ""); } } params.put("${phone}", user.getPhone()); params.put("${fromSchool}", user.getFromSchool()); params.put("${fromSpecialty}", user.getFromSpecialty()); params.put("${specialtyName}", user.getSpecialtyName()); if (playStartTime != null) { params.put("${playStartTime}", sdf.format(playStartTime)); } else { params.put("${playStartTime}", ""); } params.put("${playName}", user.getPlayName()); //返回一个新的xwpfDocument对象 File file = new File(filePath); InputStream is = new FileInputStream(file); CustomXWPFDocument doc = new CustomXWPFDocument(is); if (index == 0 || (index != 1 && index % 49 == 1)) { firstDoc = doc; } wordUtils.replaceInPara(firstDoc, doc, params); wordUtils.replaceInTable(firstDoc, doc, params, null); xwpfDocuments.add(doc); is.close(); //每50条输出一次 if (userList.size() > 50 && index != 0 && (index == userList.size() - 1 || index % 49 == 0)) { File files = new File(filesPath); if (!files.exists()) { files.mkdirs(); } //这样第一步将所有word内容替换之后生成多个 xwpfDocument //现在将多个xwpfDocument 进行合并 追加 生成word文件 CustomXWPFDocument xwpfDocument = xwpfDocuments.get(0); for (int i = 0; i < xwpfDocuments.size(); i++) { //每次的追加为了避免样式和格式混乱 加上分页符 //当是只有一条数据的时候 直接输出 if (i == 0) { xwpfDocument = xwpfDocuments.get(0); continue; } else { //当存在多条时候 xwpfDocument = mergeWord(xwpfDocument, xwpfDocuments.get(i)); } } //合并之后返回XWPFDocument对象 写出就可以了 String fileName = wordName + handleTime + ".docx"; FileOutputStream fout = new FileOutputStream(filesPath + "/" + new File(fileName)); xwpfDocument.write(fout); fout.close(); handleTime++; xwpfDocuments.clear(); } index++; } if (userList.size() > 50) { createZipPath(filesPath, response, play.getConfigName() + "-" + play.getName() + "的学生打印表"); File files = new File(filesPath); if (files.exists()) { delFolder(files.getPath()); } } else { if (xwpfDocuments.size() > 0) { //这样第一步将所有word内容替换之后生成多个 xwpfDocument //现在将多个xwpfDocument 进行合并 追加 生成word文件 CustomXWPFDocument xwpfDocument = xwpfDocuments.get(0); for (int i = 0; i < xwpfDocuments.size(); i++) { //每次的追加为了避免样式和格式混乱 加上分页符 //当是只有一条数据的时候 直接输出 if (i == 0) { xwpfDocument = xwpfDocuments.get(0); continue; } else { //当存在多条时候 xwpfDocument = mergeWord(xwpfDocument, xwpfDocuments.get(i)); } } //合并之后返回XWPFDocument对象 写出就可以了 OutputStream os = response.getOutputStream(); String fileName = new String((wordName + ".docx").getBytes("UTF-8"), "iso-8859-1"); response.setHeader("Content-disposition", "attachment; filename=" + fileName); xwpfDocument.write(os); os.close(); } } } //两个对象进行追加 public CustomXWPFDocument mergeWord(CustomXWPFDocument document, CustomXWPFDocument doucDocument2) throws Exception { CustomXWPFDocument src1Document = document; XWPFParagraph p = src1Document.createParagraph(); //设置分页符 p.setPageBreak(true); CTBody src1Body = src1Document.getDocument().getBody(); CustomXWPFDocument src2Document = doucDocument2; CTBody src2Body = src2Document.getDocument().getBody(); XWPFParagraph p2 = src2Document.createParagraph(); XmlOptions optionsOuter = new XmlOptions(); optionsOuter.setSaveOuter(); String appendString = src2Body.xmlText(optionsOuter); String srcString = src1Body.xmlText(); String prefix = srcString.substring(0, srcString.indexOf(">") + 1); String mainPart = srcString.substring(srcString.indexOf(">") + 1, srcString.lastIndexOf("<")); String sufix = srcString.substring(srcString.lastIndexOf("<")); String addPart = appendString.substring(appendString.indexOf(">") + 1, appendString.lastIndexOf("<")); CTBody makeBody = CTBody.Factory.parse(prefix + mainPart + addPart + sufix); src1Body.set(makeBody); return src1Document; } //压缩输出 public static void createZipPath(String path, HttpServletResponse response, String zipName) throws IOException { ZipOutputStream zipOutputStream = null; OutputStream output = response.getOutputStream(); response.reset(); String fileNameZip = new String((zipName + ".zip").getBytes("UTF-8"), "iso-8859-1"); response.setHeader("Content-disposition", "attachment; filename=" + fileNameZip); response.setContentType("application/msword"); zipOutputStream = new ZipOutputStream(output); File[] files = new File(path).listFiles(); FileInputStream fileInputStream = null; byte[] buf = new byte[1024]; int len = 0; if (files != null && files.length > 0) { for (File wordFile : files) { String fileName = wordFile.getName(); fileInputStream = new FileInputStream(wordFile); //放入压缩zip包中; zipOutputStream.putNextEntry(new ZipEntry(fileName)); //读取文件; while ((len = fileInputStream.read(buf)) > 0) { zipOutputStream.write(buf, 0, len); } //关闭; zipOutputStream.closeEntry(); if (fileInputStream != null) { fileInputStream.close(); } } } if (zipOutputStream != null) { zipOutputStream.close(); } } /*** * 删除文件夹 * * @param folderPath 文件夹完整绝对路径 */ public static void delFolder(String folderPath) { try { delAllFile(folderPath); // 删除完里面所有内容 String filePath = folderPath; filePath = filePath.toString(); java.io.File myFilePath = new java.io.File(filePath); myFilePath.delete(); // 删除空文件夹 } catch (Exception e) { e.printStackTrace(); } } /*** * 删除指定文件夹下所有文件 * * @param path 文件夹完整绝对路径 * @return */ public static boolean delAllFile(String path) { boolean flag = false; File file = new File(path); if (!file.exists()) { return flag; } if (!file.isDirectory()) { return flag; } String[] tempList = file.list(); File temp = null; for (int i = 0; i < tempList.length; i++) { if (path.endsWith(File.separator)) { temp = new File(path + tempList[i]); } else { temp = new File(path + File.separator + tempList[i]); } if (temp.isFile()) { temp.delete(); } if (temp.isDirectory()) { delAllFile(path + "/" + tempList[i]);// 先删除文件夹里面的文件 delFolder(path + "/" + tempList[i]);// 再删除空文件夹 flag = true; } } return flag; } public String checkSex(String idcard) { Integer sex = 0; if (idcard.length() == 15) { //15位身份证最后一位奇男偶女 sex = oddOrEven(Integer.valueOf(idcard.substring(idcard.length() - 1, idcard.length()))); } else if (idcard.length() == 18) { //18位身份证第17位奇男偶女 sex = oddOrEven(Integer.valueOf(idcard.substring(idcard.length() - 2, idcard.length() - 1))); } else { return ""; } if (sex == 1) { return "男"; } else if (sex == 2) { return "女"; } return ""; } //判断奇偶数 public Integer oddOrEven(int a) { if ((a & 1) == 1) { return 1; } else { return 2; } } }
还有就是poi的版本(版本不重要,只要不是太老的就行):
<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.9</version> </dependency>
下面是一些详细个人的代码说明:
由于我在多次生成时发现,poi的图片处理是根据模版存放的。也就是说,当CustomXWPFDocument的对象不一样时,每个对象的第一张图片的rid都是rid8(我也没有细究为啥是从8开始),但是由于后期我需要将多个CustomXWPFDocument整合成为一个输出,就造成明明图片的对象不一样,但是由于除了第一个CustomXWPFDocument的图片对象外,其他的图片并没有将数据代入第一个CustomXWPFDocument,但是图片对应的rid又能找到对应对象,所以模版的图片就成了同一张。所有后续拼接的图片根据id只能在第一个中虚招,一旦没找到,就会造成图片不显示,这也就是我为什么对每次输出循环的第一个CustomXWPFDocument进行重复添加图片的操作。
而两个createPicture的区别在于,当poi遇到完全一样的照片时,将不会执行重复写入图片数据的操作,而是使用相同的rid以作对应。我所使用的那个,可以将图片对应的rid返回,这样就不会造成图片错乱。而注释掉的那个,当发现图片重复,返回的只有CustomXWPFDocument中最后一个图片的信息,这样当重复图片不是连续时,图片的显示就出错了。
在实际操作中,我将50个及以下的操作选择用单个word直接输出,而50个以上则分开用zip输出。原因在于,在实际使用时,我发现当将多个CustomXWPFDocument合并形成一个时,数据量过大会导致卡死,影响后续的输出。在我的项目中,70个以上处理速度开始变慢翻倍,大概在76个时直接卡死。每个人可能因模版的大小及复杂程度有所不同。
当模版中有图片时,本地图片可以直接获取文件信息。链接图片则需要访问链接,并将其写入本地的一个文件中,以便直接操作使用。
以上皆为个人理解和查询结果,欢迎批评指正~~
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