JAVA converts the picture into base64 and export it to word

I am using freemarker-2.3.23.jar here

freemarker to export word

Talk about how to insert pictures

After successful insertion

 

How to generate the ftl template! !

Open the desired template-select save as-other formats

 

Then select Word 2003XML document (*.xml), click save

Then, change the test.xml suffix name to test.ftl

Next, open test.ftl

This is the base64 encoding to change it to the parameters we need

Then there are two ways to export pictures

package cn.com.tiza.hjwulian.system.common.util;

import freemarker.template.Configuration;
import freemarker.template.Template;
import sun.misc.BASE64Encoder;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;


/**
 * @Desc：word操作工具类
 * @Author：LGL
 */
public class WordUtil {

    /**
     * @param dataMap      word中需要展示的动态数据，用map集合来保存
     * @param templateName word模板名称，例如：test.ftl
     * @param filePath     文件生成的目标路径，例如：D:/wordFile/
     * @param fileName     生成的文件名称，例如：test.doc
     * @Desc：生成word文件
     * @Author：LGL
     */
    @SuppressWarnings("unchecked")
    public void createWord(Map dataMap, String templateName, String filePath, String fileName) {
        try {
            //创建配置实例
            Configuration configuration = new Configuration();

            //设置编码
            configuration.setDefaultEncoding("UTF-8");

            //ftl模板文件统一放至 com.lun.template 包下面com.admin.wordtest /yuanda-biz/src/main/java/com/zkingsoft/tools/xzcvs.ftl
            configuration.setClassForTemplateLoading(WordUtil.class, "/");

            //获取模板 
            Template template = configuration.getTemplate(templateName);

            //输出文件
            File outFile = new File(filePath + File.separator + fileName);

            //如果输出目标文件夹不存在，则创建
            if (!outFile.getParentFile().exists()) {
                outFile.getParentFile().mkdirs();
            }

            //将模板和数据模型合并生成文件 
            Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(outFile), "UTF-8"));


            //生成文件
            template.process(dataMap, out);

            //关闭流
            out.flush();
            out.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取图片对应的base64码
     * <p>
     * 图片
     *
     * @return 图片对应的base64码
     * @throws IOException
     * @date 2018/11/16 17:05
     */
    //获得图片的base64码
    public static String getImageBase(String src) throws Exception {
        if (src == null || src == "") {
            return "";
        }
        File file = new File(src);
        if (!file.exists()) {
            return "";
        }
        InputStream in = null;
        byte[] data = null;
        try {
            in = new FileInputStream(file);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }


    /**
     * 远程读取image转换为Base64字符串
     *
     * @param imgUrl
     * @return
     */
    public static String Image2Base64(String imgUrl) {
        URL url = null;
        InputStream is = null;
        ByteArrayOutputStream outStream = null;
        HttpURLConnection httpUrl = null;
        try {
            url = new URL(imgUrl);
            httpUrl = (HttpURLConnection) url.openConnection();
            httpUrl.connect();
            httpUrl.getInputStream();
            is = httpUrl.getInputStream();

            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 = is.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);
            }
            // 对字节数组Base64编码
            return new BASE64Encoder().encode(outStream.toByteArray());
        } catch (Exception e) {
            e.printStackTrace();
        }  //下载
        finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (outStream != null) {
                try {
                    outStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (httpUrl != null) {
                httpUrl.disconnect();
            }
        }
        return imgUrl;
    }

}

The first one is to get local pictures and convert them to Base64 encoding

The second is to convert to Base64 encoding by reading pictures remotely

Map<String, Object> dataMap = new HashMap<String, Object>();
//日期
dataMap.put("date", "2019-9-10");
//图片
dataMap.put("image",WordUtil.Image2Base64("http://localhost:8080/images/test.jpg"));
/** 生成word */
WordUtil wordUtil = new WordUtil();
wordUtil.createWord(dataMap, "temp.ftl", configInfo.getOutputLocalPath() +folder, fileName);

Then bring the corresponding value into the word template through Map

The export effect is as follows