docx4j 将office文件转为pdf

Posted 2021-10-07 福州-司马懿

目的

使用docx4j可以将 docx, pptx, xlsx 文件转为 pdf

添加依赖

首先，在pom.xml中引入相关依赖

<dependency>
    <groupId>org.docx4j</groupId>
    <artifactId>docx4j</artifactId>
    <version>6.1.2</version>
</dependency>
<dependency>
    <groupId>org.docx4j</groupId>
    <artifactId>docx4j-export-fo</artifactId>
    <version>11.2.9</version>
</dependency>

转PDF

下面两套代码均可以实现

代码1

private static boolean docx4jConvert(String src, String dst) {
    OutputStream os = null;
    try {
        File srcFile = new File(src);
        WordprocessingMLPackage mlPackage = WordprocessingMLPackage.load(srcFile);
        FOSettings foSettings = Docx4J.createFOSettings();
        foSettings.setWmlPackage(mlPackage);
        OutputStream os = new FileOutputStream(dst);
        Docx4J.toFO(foSettings, os, Docx4J.FLAG_EXPORT_PREFER_XSL);
        return true;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (Docx4JException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
    	if(os != null) {
			try {
				os.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
    }
    return false;
}

代码2

private static boolean docx4jConvert(String src, String dst) {
    OutputStream os = null;
    try {
        File srcFile = new File(src);
        WordprocessingMLPackage mlPackage = WordprocessingMLPackage.load(srcFile);
        os = new FileOutputStream(dst);
        Docx4J.toPDF(mlPackage, os);
        return true;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (Docx4JException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
    	if(os != null) {
			try {
				os.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
    }
    return false;
}

解决乱码问题

运行上面代码，程序打印一切正常，并输出pdf文件。但是你会发现PDF里，只要有中文的地方，都是乱码。这是由于在转换时没有找到对应字体导致的

因此我们需要在这里手动加载中文字体。如果该字体不存在于系统的字体库，我们需要使用 addPhysicalFonts 方法进行加载

    /**
     * 设置字体，解决中文乱码的问题
     */
    private static void setFontMapper(WordprocessingMLPackage mlPackage) throws Exception {
        Mapper fontMapper = new IdentityPlusMapper();
        // 加载本地字体
        //PhysicalFonts.addPhysicalFonts("SimSun", new URL("/fonts/SIMSUN.TTC"));
        fontMapper.put("隶书", PhysicalFonts.get("LiSu"));
        fontMapper.put("宋体",PhysicalFonts.get("SimSun"));
        fontMapper.put("微软雅黑",PhysicalFonts.get("Microsoft Yahei"));
        fontMapper.put("黑体",PhysicalFonts.get("SimHei"));
        fontMapper.put("楷体",PhysicalFonts.get("KaiTi"));
        fontMapper.put("新宋体",PhysicalFonts.get("NSimSun"));
        fontMapper.put("华文行楷", PhysicalFonts.get("STXingkai"));
        fontMapper.put("华文仿宋", PhysicalFonts.get("STFangsong"));
        fontMapper.put("宋体扩展",PhysicalFonts.get("simsun-extB"));
        fontMapper.put("仿宋",PhysicalFonts.get("FangSong"));
        fontMapper.put("仿宋_GB2312",PhysicalFonts.get("FangSong_GB2312"));
        fontMapper.put("幼圆",PhysicalFonts.get("YouYuan"));
        fontMapper.put("华文宋体",PhysicalFonts.get("STSong"));
        fontMapper.put("华文中宋",PhysicalFonts.get("STZhongsong"));
        fontMapper.put("等线", PhysicalFonts.get("SimSun"));
        fontMapper.put("等线 Light", PhysicalFonts.get("SimSun"));
        fontMapper.put("华文琥珀", PhysicalFonts.get("STHupo"));
        fontMapper.put("华文隶书", PhysicalFonts.get("STLiti"));
        fontMapper.put("华文新魏", PhysicalFonts.get("STXinwei"));
        fontMapper.put("华文彩云", PhysicalFonts.get("STCaiyun"));
        fontMapper.put("方正姚体", PhysicalFonts.get("FZYaoti"));
        fontMapper.put("方正舒体", PhysicalFonts.get("FZShuTi"));
        fontMapper.put("华文细黑", PhysicalFonts.get("STXihei"));
        fontMapper.put("宋体扩展", PhysicalFonts.get("simsun-extB"));
        fontMapper.put("仿宋_GB2312", PhysicalFonts.get("FangSong_GB2312"));
        fontMapper.put("新細明體", PhysicalFonts.get("SimSun"));
        //解决宋体（正文）和宋体（标题）的乱码问题
        PhysicalFonts.put("PMingLiU", PhysicalFonts.get("SimSun"));
        PhysicalFonts.put("新細明體", PhysicalFonts.get("SimSun"));
        //宋体&新宋体
        PhysicalFont simsunFont = PhysicalFonts.get("SimSun");
        fontMapper.put("SimSun", simsunFont);
        mlPackage.setFontMapper(fontMapper);
    }

之后即可正常显示了

转换限制

docx4j 只能转换 docx/pptx/xlsx 这三种类型的文件，如果你使用诸如 txt、doc 这类文件，就会报如下错误

ClassNotFoundException

javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath.