企业官网建设流程全解析

最近项目需要，需要将文本信息下载为doc文件（带图片），小白通过在网上查找资料实现了这个功能

先引入freemarker的jar包

<dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.13</version> </dependency>

制作模板文件：

新建一个word文件：

英文部分是后面需要替换的内容，插入图片，后面也需要替换

将文件另存为xml，编辑器打开xml文件，将上述英文部分用${....}替换，${....}中的内容是后台传递过来的值（你需要显示的内容），doc中的图片在xml中被解析成一长串的base64编码，需要用${image}代替base64编码。最后将xml文化后缀改为ftl，并将ftl文件放到你项目中

下面是后台代码：

建立工具类

package com.jhzj.common.utils; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.BufferedWriter; import java.io.ByteArrayOutputStream; 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.net.HttpURLConnection; import java.net.URL; import java.text.SimpleDateFormat; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletResponse; import com.jhzj.entity.bussiness.attendance.LeaveDto; import freemarker.template.Configuration; import freemarker.template.Template; import freemarker.template.TemplateException; import sun.misc.BASE64Encoder; public class WordUtil { private Configuration configuration = null; public WordUtil() { configuration = new Configuration(); configuration.setDefaultEncoding("UTF-8"); } /** * 将文本信息转为word输出 * @param dto * @throws Exception */ public File createDoc(LeaveDto dto) { Map<String,Object> dataMap = new HashMap<>(); getData(dataMap,dto); //创建数据 configuration.setClassForTemplateLoading(this.getClass(), ""); //模板文件所在路径 Template t = null; String fileName = dto.getUserName()+"-请假.doc"; File file = new File(fileName); try { t = configuration.getTemplate("leaveoff.ftl"); //获取模板文件 t.setEncoding("utf-8"); Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileName),"utf-8")); t.process(dataMap, out); //将填充数据填入模板文件并输出到目标文件 out.close(); } catch (IOException e) { e.printStackTrace(); } catch (TemplateException e) { e.printStackTrace(); } return file; } /** * 导出word 并提供下载 * @param response */ public void download(HttpServletResponse response,LeaveDto dto) { BufferedInputStream bis = null; BufferedOutputStream bos = null; try { File file = createDoc(dto); String fileName = dto.getUserName()+"-请假.doc"; response.setContentType("application/msword;charset=utf-8"); response.addHeader("Content-Disposition", "attachment; filename=\"" + new String(fileName.getBytes(),"iso-8859-1") + "\""); bis = new BufferedInputStream(new FileInputStream(file)); bos = new BufferedOutputStream(response.getOutputStream()); byte[] buff = new byte[10240]; int bytesRead; while(-1 != (bytesRead = bis.read(buff, 0, buff.length))) { bos.write(buff, 0, bytesRead); } bis.close(); bos.close(); } catch (Exception e) { e.printStackTrace(); } } //获得数据 private void getData(Map<String,Object> dataMap, LeaveDto dto) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); dataMap.put("userName", dto.getUserName()); dataMap.put("type", dto.getType()); dataMap.put("startTime", sdf.format(dto.getStartTime())); dataMap.put("endTime", sdf.format(dto.getEndTime())); dataMap.put("reason", dto.getReason()); System.out.println("=================="+dto.getPicture()); String base64 = getBase64(dto.getPicture()); dataMap.put("image", base64); } //获得图片的base64编码 private String getBase64(String imgUrl) { ByteArrayOutputStream data = new ByteArrayOutputStream(); URL url = null; InputStream in = null; HttpURLConnection httpUrl = null; byte[] by = new byte[1024]; try { url = new URL(imgUrl); httpUrl = (HttpURLConnection)url.openConnection(); httpUrl.connect(); in = httpUrl.getInputStream(); int len = -1; while((len = in.read(by)) != -1) { data.write(by, 0, len); } in.close(); } catch (IOException e) { e.printStackTrace(); } BASE64Encoder encoder = new BASE64Encoder(); return encoder.encode(data.toByteArray()); } }

Controller代码：

/** * 下载信息 * @param id 请假id * @return */ @RequestMapping(value = "/download") @ResponseBody public void downloadInfo(HttpServletResponse response,Integer id) { //if (doSecurityIntercept(Const.RESOURCES_TYPE_BUTTON){ try { WordUtil wd = new WordUtil(); LeaveDto dto = service.checkInfo(id); wd.download(response, dto); } catch (BussinessException e) { e.printStackTrace(); }catch (Exception e) { logger.error(e.toString(), e); e.printStackTrace(); } //} }

备注：如果模板是表格的话，表头的第一行需要保留。

在列表前加入<#list list as l>（在它的头上加一个<#list 你的集合名称 as xxxx>）,并在结尾加上</#list>，修改list内容，在要输出的名字前面加上l.。如xuehao，修改为l.xuehao。这样有点像EL表达式的使用。

表格循环：

private void getData(Map<String, Object> dataMap) { dataMap.put("title", "标题"); dataMap.put("nian", "2016"); dataMap.put("yue", "3"); dataMap.put("ri", "6"); dataMap.put("shenheren", "lc"); List<Map<String,Object>> list = new ArrayList<Map<String,Object>>(); for (int i = 0; i < 10; i++) { Map<String,Object> map = new HashMap<String,Object>(); map.put("xuehao", i); map.put("neirong", "内容"+i); list.add(map); } dataMap.put("list", list); }

以上代码都是本人亲测可用！