Java模板动态生成word文件的方法步骤

 public static void exportDoc() {
        String picturePath = "D:/image.png";
        Map<String, Object> dataMap = new HashMap<String, Object>();
        dataMap.put("brand", "海尔");
        dataMap.put("store_name", "海尔天津");
        dataMap.put("user_name", "小明");

        //经过编码后的图片路径
        String image = getWatermarkImage(picturePath);
        dataMap.put("image", image);

        //Configuration用于读取ftl文件
        Configuration configuration = new Configuration(new Version("2.3.0"));
        configuration.setDefaultEncoding("utf-8");

        Writer out = null;
        try {
            //输出文档路径及名称
            File outFile = new File("D:/导出优惠证明.doc");
            out = new BufferedWriter(new OutputStreamWriter(new
            FileOutputStream(new File("outFile")), "utf-8"), 10240);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        // 加载文档模板
        Template template = null;
        try {
            //指定路径，例如C:/a.ftl 注意：此处指定ftl文件所在目录的路径，而不是ftl文件的路径
            configuration.setDirectoryForTemplateLoading(new File("C:/"));
            //以utf-8的编码格式读取文件
            template = configuration.getTemplate("导出优惠证明.ftl", "utf-8");
        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException("文件模板加载失败！", e);
        }

        // 填充数据
        try {
            template.process(dataMap, out);
        } catch (TemplateException e) {
            e.printStackTrace();
            throw new RuntimeException("模板数据填充异常！", e);
        } catch (IOException e) {
            e.printStackTrace();
            throw new RuntimeException("模板数据填充异常！", e);
        } finally {
            if (null != out) {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                    throw new RuntimeException("文件输出流关闭异常！", e);
                }
            }
        }
    }

private String getWatermarkImage(String watermarkPath) {
    InputStream in = null;
    byte[] data = null;
    try {
        in = new FileInputStream(watermarkPath);
        data = new byte[in.available()];
        in.read(data);
        in.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    BASE64Encoder encoder = new BASE64Encoder();
    return encoder.encode(data);
}