Freemarker下载Word文档(文字+图片+表格)Idea示例 (附word展示图片异常解决方案)(附JPEG格式图片通过imageio.read方法读取为null解决方案)

流程:拿到word模板转为ftl格式并填充占位符参数,调用java代码填充参数即可
(文末附word打开图片显示异常,wps打开却显示正常的解决方案)

(文末附Jpeg格式图片获取为null解决方案)

1:拿到需要展示的Word文档,填充默认值

2:填充完毕后:

${}为单一参数 ${aList.a}为list参数后续会展示如何设置ftl模板中的list格式

注:若图片存在,则不要将图片删除也不要转为${}形式后续会展示如何设置图片

3:将docx类型的文档转为xml格式存储方式:点击文档左上角:文件:另存为: 存为xml格式

4:转为xml后即可把xml中的图片base64删除改为${picture} 并将宽高度也替换为${}

5:再将xml格式转为ftl格式右击文件重命名改为abc.ftl 然后拖入idea工程格式化一下数据 (ctrl+alt+L) 注:idea中文件名不支持中文

6:格式化后将list标签存入模板找到${aList.name}的标签<w:tr> 用<#list cl as cList>将其包起来 </#list>

as前面的值为之后存入map里的key as后的值为你的list在ftl中的key 及${cList.name} 中的cList

7:至此模板大功告成剩下就是java代码了复制粘贴即可

pom文件先引入freemarker依赖

<dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><version>2.3.28</version>
</dependency>

util工具类及controller代码注:需用浏览器发起get请求 postman调用下载的文件中文名称会乱码


import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Map;import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import freemarker.template.Configuration;
import freemarker.template.Template;
import org.springframework.stereotype.Component;
import sun.misc.BASE64Encoder;@Component
public class WordUtil {private static Configuration configuration = null;//生成文件下载的主方法public void exportMillCertificateWord(HttpServletRequest request, HttpServletResponse response, Map map, String title, String ftlFile) throws IOException {configuration = new Configuration();configuration.setDefaultEncoding("utf-8");//此处getclass为默认resources目录configuration.setClassForTemplateLoading(this.getClass(), "/ftl");        Template freemarkerTemplate = configuration.getTemplate(ftlFile);File file = null;InputStream fin = null;ServletOutputStream out = null;try {// 调用工具类的createDoc方法生成Word文档file = createDoc(map, freemarkerTemplate);fin = new FileInputStream(file);response.setCharacterEncoding("utf-8");response.setContentType("application/msword");// 设置浏览器以下载的方式,处理该文件名  ps:docx格式office可能存在打不开等问题String fileName = title  + ".doc";fileName = URLEncoder.encode(fileName, "utf-8");response.setHeader("Content-Disposition","attachment;filename="+fileName);out = response.getOutputStream();byte[] buffer = new byte[512];int bytesToRead = -1;// 通过循环将读入的Word文件的内容输出到浏览器中while ((bytesToRead = fin.read(buffer)) != -1) {out.write(buffer, 0, bytesToRead);}} finally {if (fin != null) fin.close();if (out != null) out.close();    //关闭对应流if (file != null) file.delete(); // 删除临时文件}}//私有代码 无需关注private File createDoc(Map<?, ?> dataMap, Template template) {String name = "sellPlan.doc";File f = new File(name);Template t = template;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 w = new OutputStreamWriter(new FileOutputStream(f), "utf-8");t.process(dataMap, w);w.close();} catch (Exception ex) {ex.printStackTrace();throw new RuntimeException(ex);}return f;}//将服务器url地址转为base64 map存储需要用到public String ImageToBase64(String netImagePath) {ByteArrayOutputStream data = new ByteArrayOutputStream();try {// 创建URL　　URL url = new URL(netImagePath);byte[] by = new byte[1024];// 创建链接　HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(5000);InputStream is = conn.getInputStream();// 　// 将内容读取内存中　　int len = -1;while ((len = is.read(by)) != -1) {data.write(by, 0, len);}is.close();} catch (IOException e) {e.printStackTrace();}// 对字节数组Base64编码　　BASE64Encoder encoder = new BASE64Encoder();return encoder.encode(data.toByteArray());}}

@RestController
@RequestMapping("/test")
public class TestController {@Autowiredprivate WordUtil wordUtil;@ApiOperation("下载摄像头部署word模板")@GetMapping(value = "/getWord/{id}")public void getWord(HttpServletResponse response, HttpServletRequest request) throws IOException {//你自己的代码 得到所有数据String name = "测试";List<showDto> list = new ArrayList<>();String url = "https://123213213";//服务器地址//得到数据结束//封装数据Map<String, Object> map = new HashMap<>();map.put("cList", list);map.put("shopName", name);//通过imageio方法 拿到图片宽高BufferedImage bufferedImage = ImageIO.read(new URL(url));int height = bufferedImage.getHeight();int width = bufferedImage.getWidth();// 设置图片的大小map.put("height", height + "px");map.put("width", width + "px");//调用util方法将服务器地址转为base64 展示到word中map.put("picture", wordUtil.ImageToBase64(url));try {//这里设置文档的名称 和模板的名字 abc.ftl为 resource下的 ftl包下的 abc.ftl文件wordUtil.exportMillCertificateWord(request, response, map, "测试word", "abc.ftl");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}
}

freemarker加载模板方法转自: https://blog.csdn.net/erpenggg/article/details/81216386

下载后用win10自带Word打开图片不显示问题解决方案转自:(wps可以正常显示图片 word不显示)https://blog.csdn.net/weixin_39674487/article/details/106422125?spm=1001.2101.3001.6650.8&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-8.pc_relevant_default&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-8.pc_relevant_default&utm_relevant_index=11tt

通过Imageio.read方法读取jpeg,webp格式图片为null解决方案为:

pom添加一个依赖包:

<dependency><groupId>org.sejda.imageio</groupId><artifactId>webp-imageio</artifactId><version>0.1.6</version></dependency>