可以先用已经有数据的模板生成 word xml 格式然后找到

<pkg:part pkg:name="/word/media/image1.jpeg" pkg:contentType="image/jpeg" pkg:compression="store">
    <pkg:binaryData>${photo}</pkg:binaryData>
</pkg:part>
String base64 = WordGenerator.getImageString(png.getAbsolutePath());
map.put("photo", base64);

生成word java 类

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.Map;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;

import sun.misc.BASE64Encoder;

import com.allrun.model.config.FileConfig;

import freemarker.template.Configuration;
import freemarker.template.Template;

public class WordGenerator {

    private static Configuration configuration=null; 

    private static final String templateFolderEvaluate= ServletActionContext.getServletContext().getRealPath(FileConfig.evaluateTempPath);// 干部综合考评

    //private static final String templateFolder = WordGenerator.class.getClass().getResource("").getPath()+"/ftl/";  
    //private static final String templateFolder = WordGenerator.class.getClass().getResource("/" + ClassUtils.convertClassNameToResourcePath(WordGenerator.class.getPackage().getName())).getFile() + "/ftl";
    //        String xmlTemp = tempPath + File.separator + strFileGuid + File.separator + path + "_temp.xml";
    private static final String templateFolder = templateFolderEvaluate + File.separator;
    //java.io.FileNotFoundException: G:\Lhp\workspace\.metadata\.me_tcat\webapps\zssr_web\files\docTemplate\account\webapps\zssr_web\files\docTemplate\evaluate\report.ftl does not exist.

    static{ 
        configuration=new Configuration(); 
        configuration.setDefaultEncoding("utf-8"); 
        try { 
            configuration.setDirectoryForTemplateLoading(new File(templateFolder));
        } catch (IOException e) { 
            e.printStackTrace();//throw new RuntimeException(e); 
        } 
    } 

    private WordGenerator() { 
        throw new AssertionError(); 
    } 

    /**
     * 下载合同
     * @param map 要填充的数据模型
     * @param docName 下载保存的名称(例如：销售合同.doc)
     * @param ftlFile ftl模板名称(例如：sellerContract.ftl)
     * @throws Exception
     */
    public static void downReportWord(HttpServletRequest request, HttpServletResponse response, Map<?, ?> map,String docName,String ftlFile) throws Exception {  
        File file = null;  
        FileInputStream fin = null;  
        ServletOutputStream out = null;  
        try {
            setDownloadHeader(request, response, docName);//设置下载头

            // 调用工具类的createDoc方法生成Word文档  
            file = createDoc(request,response,map,docName,ftlFile);  
            fin = new FileInputStream(file.getAbsolutePath());  
            out = response.getOutputStream();  
            int len = 0;
            byte[] buf = new byte[1024];
            while ((len = fin.read(buf)) != -1) {
                out.write(buf, 0, len);
            }
            out.flush();
        } catch (Exception e) {
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
            throw new Exception(e.getMessage(), e);
        } finally {  
            if(fin != null) {
                try {
                    fin.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }  
            if(out != null) {
                try {
                    out.close();
                } catch (Exception e) {
                    e.printStackTrace();
                } 
            } 
            if(file != null) {
                try {
                    file.delete();// 删除临时文件  
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }  
        }  
    }

    /**
     * 下载合同
     * @param map 要填充的数据模型
     * @param docName 下载保存的名称(例如：销售合同.doc)
     * @param ftlFile ftl模板名称(例如：sellerContract.ftl)
     * @throws Exception
     */
    public static void downReportWord( Map<?, ?> map,String docName,String ftlFile) throws Exception {  
        File file = null;  
        try {

            // 调用工具类的createDoc方法生成Word文档  
            file = createDoc(map,docName,ftlFile); 
            System.out.println(file.getAbsolutePath());
        } catch (Exception e) {
            throw new Exception(e.getMessage(), e);
        } finally {  
            if(file != null) {
                try {
                    //file.delete();// 删除临时文件  
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }  
        }  
    }


    /**
     * 导入ftl并创建doc 
     * @param request
     * @param response
     * @param dataMap
     * @param docName
     * @param ftlFile
     * @return
     * @throws IOException
     */
    public static File createDoc(HttpServletRequest request, HttpServletResponse response,Map<?, ?> dataMap, String docName,String ftlFile) throws IOException { 
        Template template = configuration.getTemplate(ftlFile);
        //String name = templateFolder + File.separator + (int) (Math.random() * 100000) + docName; 
        File file = new File(docName); 
        try { // 这个地方不能使用FileWriter因为需要指定编码类型否则生成的Word文档会因为有无法识别的编码而无法打开 
            Writer writer = new OutputStreamWriter(new FileOutputStream(file), "utf-8"); 
            template.process(dataMap, writer); 
            // 关闭流
            writer.flush();
            writer.close(); 
        } catch (Exception ex) { 
            ex.printStackTrace();
        } 
        return file; 
    } 


    /**
     * 导入ftl并创建doc 
     * @param request
     * @param response
     * @param dataMap
     * @param docName
     * @param ftlFile
     * @return
     * @throws IOException
     */
    public static File createDoc(Map<?, ?> dataMap, String docName,String ftlFile) throws IOException { 
        Template template = configuration.getTemplate(ftlFile);
        //String name = templateFolder + File.separator + docName; 
        File file = new File(docName); 
        try { // 这个地方不能使用FileWriter因为需要指定编码类型否则生成的Word文档会因为有无法识别的编码而无法打开 
            Writer writer = new OutputStreamWriter(new FileOutputStream(file), "utf-8"); 
            template.process(dataMap, writer); 
            // 关闭流
            writer.flush();
            writer.close(); 
        } catch (Exception ex) { 
            ex.printStackTrace();
        } 
        return file; 
    } 

    /** object转map
     * <p>Title: objectToMap</p>  
     * <p>Description: </p>  
     * @param obj
     * @return
     */
    public static Map<?, ?> objectToMap(Object obj) {
        if (obj == null) {
            return null;
        }
        return new org.apache.commons.beanutils.BeanMap(obj);
    }

    /**
     * map转Object
     * <p>Title: mapToObject</p>  
     * <p>Description: </p>  
     * @param map
     * @param beanClass 
     * @return
     * @throws Exception
     */
    public static Object mapToObject(Map<String, Object> map, Class<?> beanClass)
            throws Exception {
        if (map == null)
            return null;
        Object obj = beanClass.newInstance();
        org.apache.commons.beanutils.BeanUtils.populate(obj, map);
        return obj;
    }

    /**
     * 
     * @param request
     * @param response
     * @param fileName
     */
    public static void setDownloadHeader(HttpServletRequest request, HttpServletResponse response, String fileName) {
        String userAgent = request.getHeader("User-Agent");
        boolean isIE = (userAgent != null) && (userAgent.toLowerCase().indexOf("msie") != -1);

        response.setHeader("Pragma", "No-cache");
        response.setHeader("Cache-Control", "must-revalidate, no-transform");
        response.setDateHeader("Expires", 0L);

        response.setContentType("application/x-download");

        try {
            if (isIE) {
                fileName = new String(fileName.getBytes("gb2312"), "iso-8859-1");
                response.setHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
            } else {
                fileName = new String(fileName.getBytes("gb2312"), "iso-8859-1");
                response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static String getImageString(String imgFile) throws IOException {
        InputStream in = null;
        byte[] data = null;
        try {
            in = new FileInputStream(imgFile);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
}