最近項(xiàng)目需要實(shí)現(xiàn)pdf下載的功能，由于沒(méi)有這方面的經(jīng)驗(yàn)，從網(wǎng)上花了很長(zhǎng)時(shí)間查找了相關(guān)的資料。整理之后，發(fā)現(xiàn)有幾個(gè)框架可以實(shí)現(xiàn)這個(gè)功能。
1. 開(kāi)源框架支持
- itext，生成pdf文檔，還支持將xml、html文件轉(zhuǎn)化為pdf文件；
- apache pdfbox，生成、合并pdf文檔；
- docx4j，生成docx文檔，支持轉(zhuǎn)換為pdf格式。
2. 實(shí)現(xiàn)方案
比較了一番后，采用了freemarker+docx4j+apache pdfbox的方案：
maven依賴
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<!-- pdfbox --><dependency> <groupid>org.apache.pdfbox</groupid> <artifactid>pdfbox</artifactid> <version>2.0.11</version></dependency><!-- docx4j --><dependency> <groupid>org.docx4j</groupid> <artifactid>docx4j</artifactid> <version>3.3.7</version></dependency><dependency> <groupid>org.apache.xmlgraphics</groupid> <artifactid>batik-util</artifactid> <version>1.10</version></dependency><dependency> <groupid>org.docx4j</groupid> <artifactid>docx4j-export-fo</artifactid> <version>3.3.6</version></dependency><!-- https://mvnrepository.com/artifact/dom4j/dom4j --><dependency> <groupid>dom4j</groupid> <artifactid>dom4j</artifactid> <version>1.6.1</version></dependency><!-- image --><dependency> <groupid>net.coobird</groupid> <artifactid>thumbnailator</artifactid> <version>0.4.8</version></dependency><!-- json --><dependency> <groupid>com.alibaba</groupid> <artifactid>fastjson</artifactid> <version>1.2.47</version></dependency> |
步驟
1 把pdf文檔對(duì)應(yīng)的word(docx)制作出來(lái)
2 把word文檔另存為xml文件
另存為xml
3 將xml文件制作為freemarker模版(ftl)文件
制作模版文件
4 將數(shù)據(jù)和ftl文件組裝為xml文本
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map<string, object> map = new hashmap<>();map.put("name", "小明");map.put("address", "北京市朝陽(yáng)區(qū)");map.put("email", "xiaoming@abc.com");stringwriter stringwriter = new stringwriter();bufferedwriter writer = new bufferedwriter(stringwriter);template.process(map, writer);string xmlstr = stringwriter.tostring(); |
5 使用docx4j將xml文本加載為word文檔對(duì)象
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bytearrayinputstream in = new bytearrayinputstream(xmlstr.getbytes());wordprocessingmlpackage wordmlpackage = wordprocessingmlpackage.load(in); |
6 使用docx4j將word文檔轉(zhuǎn)存為pdf文檔
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string outputfilepath = "/users/xiaoming/簡(jiǎn)歷.pdf";docx4j.topdf(wordmlpackage, new fileoutputstream(new file(outputfilepath))); |
7 使用apache pdfbox將多個(gè)pdf文檔合為一個(gè)
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string foldername = "/users/xiaoming/pdfs";string destpath = "/users/xiaoming/all.pdf";pdfmergerutility mergepdf = new pdfmergerutility();string[] filesinfolder = getfiles(foldername);arrays.sort(filesinfolder, new comparator<string>() { @override public int compare(string o1, string o2) { return o1.compareto(o2); }});for (int i = 0; i < filesinfolder.length; i++) { mergepdf.addsource(foldername + file.separator + filesinfolder[i ]);}mergepdf.setdestinationfilename(destpath);mergepdf.mergedocuments(memoryusagesetting.setupmainmemoryonly()); |
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://www.jianshu.com/p/b89f6ea30585
