java:cdn图片导出成word内容

项目需求把聊天记录中的文字和存放在cdn中的图片导出成word内容，使用到了mht(今日主要的坑在于cdn外链图片如何放入到word中)

百度中的mht的定义

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MHTML文件又称为聚合HTML文档、Web档案或单一文件网页。单个文件网页可将网站的所有元素（包括文本和图形）都保存到单个文件中。这种封装使您可将整个网站发布为单个内嵌MIME （MIME：通过 Internet 连接传递多媒体资源的一列标准。MIME类型通知程序对象所包含的内容（如图形、声音或视频)的聚合HTML文档(MHTML)文件，或将整个网站作为一个电子邮件或附件发送。Internet Explorer 4.0及更高版本支持此格式。

由于每个聊天记录的图片都是放入到了oss中所以为了要放入word里面避免无外网情况下查看到图片所以每次在导出时先去判断是否已经下载过该图如果下载了那就只取，并把图片使用base64加密到mht中，具体的实现看以下部分

用到的一些知识补充

1.Content-Location
首部字段表示的是报文主体返回资源对应的URI(统一资源标识符Uniform Resource Identifier)
当返回的页面内容与实际请求的对象不同时，首部字段Content-Location内会写明URI
代码中file:///C:/9FD15EF4/file8676.htm

2.Content-Transfer-Encoding
规定了传输报文主体时采用的编码方式
代码中Content-Transfer-Encoding: quoted-printable

3.Content-Type
multipart/related=内嵌资源
boundary=使用字符串来划分多部分对象集合指明的各类实体。在boundary字符串指定的各个实体的起始行之前插入“–”标记（例如：——=_NextPart_01CFAA79.4B969C00），而在多部分对象集合对应的字符串的最后插入“–”（例如：——=_NextPart_01CFAA79.4B969C00–）作为结束

4.MIME（Multipurpose Internet Mail Extensions多用途因特网邮件扩展）机制
mime允许处理文本，图片，视频等不同类型的数据。而在mime扩展中会使用一种称为多部分对象集合的方法，来容纳多分不同类型的数据。

实际代码

1.pom.xml 为了导出模板使用freemarker

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<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.23</version>
</dependency>

2.mhtword.ftl 模板中的内容

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MIME-Version: 1.0
Content-Type: multipart/related; boundary="----=_NextPart_01CFAA79.4B969C00"
此文档为“单个文件网页”，也称为“Web 档案”文件。如果您看到此消息，但是您的浏览器或编辑器不支持“Web 档案”文件。请下载支持“Web 档案”的浏览器，如 Microsoft Internet Explorer。
------=_NextPart_01CFAA79.4B969C00
Content-Location: file:///C:/9FD15EF4/file8676.htm
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset="utf-8"
<html xmlns:v=3D"urn:schemas-microsoft-com:vml"
xmlns:o=3D"urn:schemas-microsoft-com:office:office"
xmlns:w=3D"urn:schemas-microsoft-com:office:word"
xmlns=3D"http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=3DContent-Type content=3D"text/html; charset=3Dutf-8">
<meta name=3DProgId content=3DWord.Document>
<meta name=3DGenerator content=3D"Microsoft Word 11">
<meta name=3DOriginator content=3D"Microsoft Word 11">
<link rel=3DFile-List href=3D"file8676.files/filelist.xml">
<link rel=3DEdit-Time-Data href=3D"file8676.files/editdata.mso">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]-->
<title>${title}</title>
<!--[if gte mso 9]><xml>
 <o:DocumentProperties>
  <o:Author>User</o:Author>
  <o:LastAuthor>User</o:LastAuthor>
  <o:Revision>3</o:Revision>
  <o:TotalTime>1</o:TotalTime>
  <o:Created>2014-07-28T07:16:00Z</o:Created>
  <o:LastSaved>2014-07-28T07:33:00Z</o:LastSaved>
  <o:Pages>1</o:Pages>
  <o:Words>11</o:Words>
  <o:Characters>63</o:Characters>
  <o:Company>&#24494;&#36719;&#20013;&#22269;</o:Company>
  <o:Lines>1</o:Lines>
  <o:Paragraphs>1</o:Paragraphs>
  <o:CharactersWithSpaces>73</o:CharactersWithSpaces>
  <o:Version>11.9999</o:Version>
 </o:DocumentProperties>
</xml><![endif]--><!--[if gte mso 9]><xml>
 <w:WordDocument>
  <w:SpellingState>Clean</w:SpellingState>
  <w:GrammarState>Clean</w:GrammarState>
  <w:PunctuationKerning/>
  <w:DrawingGridVerticalSpacing>7.8 &#30917;</w:DrawingGridVerticalSpacing>
  <w:DisplayHorizontalDrawingGridEvery>0</w:DisplayHorizontalDrawingGridEve=
ry>
  <w:DisplayVerticalDrawingGridEvery>2</w:DisplayVerticalDrawingGridEvery>
  <w:ValidateAgainstSchemas/>
  <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid>
  <w:IgnoreMixedContent>false</w:IgnoreMixedContent>
  <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText>
  <w:Compatibility>
   <w:SpaceForUL/>
   <w:BalanceSingleByteDoubleByteWidth/>
   <w:DoNotLeaveBackslashAlone/>
   <w:ULTrailSpace/>
   <w:DoNotExpandShiftReturn/>
   <w:AdjustLineHeightInTable/>
   <w:BreakWrappedTables/>
   <w:SnapToGridInCell/>
   <w:WrapTextWithPunct/>
   <w:UseAsianBreakRules/>
   <w:DontGrowAutofit/>
   <w:UseFELayout/>
  </w:Compatibility>
  <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel>
 </w:WordDocument>
</xml><![endif]--><!--[if gte mso 9]><xml>
 <w:LatentStyles DefLockedState=3D"false" LatentStyleCount=3D"156">
 </w:LatentStyles>
</xml><![endif]-->
<style>
<!--
 /* Font Definitions */
 @font-face
    {font-family:SimSun;
    panose-1:2 1 6 0 3 1 1 1 1 1;
    mso-font-alt:SimSun;
    mso-font-charset:134;
    mso-generic-font-family:auto;
    mso-font-pitch:variable;
    mso-font-signature:3 135135232 16 0 262145 0;}
@font-face
    {font-family:SimSun;
    panose-1:2 1 6 0 3 1 1 1 1 1;
    mso-font-charset:134;
    mso-generic-font-family:auto;
    mso-font-pitch:variable;
    mso-font-signature:3 135135232 16 0 262145 0;}
 /* Style Definitions */
 p.MsoNormal, li.MsoNormal, div.MsoNormal
    {mso-style-parent:"";
    margin:0cm;
    margin-bottom:.0001pt;
    text-align:justify;
    text-justify:inter-ideograph;
    mso-pagination:none;
    font-size:10.5pt;
    mso-bidi-font-size:10.0pt;
    font-family:"Times New Roman";
    mso-fareast-font-family:SimSun;
    mso-font-kerning:1.0pt;}
span.GramE
    {mso-style-name:"";
    mso-gram-e:yes;}
 /* Page Definitions */
 @page
    {mso-page-border-surround-header:no;
    mso-page-border-surround-footer:no;}
@page Section1
    {size:595.3pt 841.9pt;
    margin:72.0pt 90.0pt 72.0pt 90.0pt;
    mso-header-margin:42.55pt;
    mso-footer-margin:49.6pt;
    mso-paper-source:0;
    layout-grid:15.6pt;}
div.Section1
    {page:Section1;}
-->
</style>
<!--[if gte mso 10]>
<style>
 /* Style Definitions */
 table.MsoNormalTable
    {mso-style-name:\666E\901A\8868\683C;
    mso-tstyle-rowband-size:0;
    mso-tstyle-colband-size:0;
    mso-style-noshow:yes;
    mso-style-parent:"";
    mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
    mso-para-margin:0cm;
    mso-para-margin-bottom:.0001pt;
    mso-pagination:widow-orphan;
    font-size:10.0pt;
    font-family:"Times New Roman";
    mso-fareast-font-family:"Times New Roman";
    mso-ansi-language:#0400;
    mso-fareast-language:#0400;
    mso-bidi-language:#0400;}
</style>
<![endif]--><!--[if gte mso 9]><xml>
 <o:shapedefaults v:ext=3D"edit" spidmax=3D"2050"/>
</xml><![endif]--><!--[if gte mso 9]><xml>
 <o:shapelayout v:ext=3D"edit">
  <o:idmap v:ext=3D"edit" data=3D"1"/>
 </o:shapelayout></xml><![endif]-->
</head>
<body lang=3DZH-CN style=3D'tab-interval:21.0pt;text-justify-trim:punctuati=
on'>
<div class=3DSection1 style=3D'layout-grid:15.6pt'>
<p class=3DMsoNormal align=3Dleft style=3D'text-align:left;mso-outline-level:1'>
    <span style=3D'font-size:12.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>
        ${content}
    </span>
    <span lang=EN-US style=3D'font-size:12.0pt;font-family:宋体'>
        <o:p></o:p>
    </span>
</p>
</div>
</body>
</html>
<#list imageList as imageMap>
------=_NextPart_01CFAA79.4B969C00
Content-Location: file:///C:/9FD15EF4/file8676.files/${imageMap["imageName"]}
Content-Transfer-Encoding: base64
Content-Type: image/${imageMap["imageType"]}
${imageMap["imageBase"]}
</#list>
------=_NextPart_01CFAA79.4B969C00
Content-Location: file:///C:/9FD15EF4/file8676.files/filelist.xml
Content-Transfer-Encoding: quoted-printable
Content-Type: text/xml; charset="utf-8"
<xml xmlns:o=3D"urn:schemas-microsoft-com:office:office">
<o:MainFile HRef=3D"../file8676.htm"/>
<#list imageList as imageMap>
<o:File HRef=3D"${imageMap["imageName"]}"/>
</#list>
 <o:File HRef=3D"filelist.xml"/>
</xml>
------=_NextPart_01CFAA79.4B969C00--

3.具体实现类

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package com.shanyuan.political.party.platform.controller.admin.meeting;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import com.shanyuan.political.party.platform.common.util.Md5Util;
import com.shanyuan.political.party.platform.facade.meeting.MeetingFacade;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import sun.misc.BASE64Encoder;
@SuppressWarnings("restriction")
@Controller
@CrossOrigin
@RequestMapping(value="/admin-meeting")
public class AdminMeetingController {
	
	@Autowired
	private MeetingFacade meetingFacade;
	public void createDoc(Map<String,Object> dataMap,Writer out) {
        //设置模本装置方法和路径,FreeMarker支持多种模板装载方法。可以重servlet，classpath，数据库装载，
    	@SuppressWarnings("deprecation")
		Configuration configuration = new Configuration();
        configuration.setDefaultEncoding("utf-8");
    	configuration.setClassForTemplateLoading(this.getClass(), "/");
        Template t=null;
        try {
            //放在resources/template 目录下面
            t = configuration.getTemplate("template/mhtword.ftl", "UTF-8");
            t.process(dataMap, out);
        } catch (TemplateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    /*
     * <img/>
     * <img/> ==>
     * <v:shape style=3D'width:352.5pt;height:318.75pt'>
            <v:imagedata src=3D"file8676.files/image002.jpg" o:title=3D"logo"/>
        </v:shape>
     */
    public Map<String,Object> exImageToD(HttpServletRequest request,String content) throws FileNotFoundException, IOException {
    	Map<String,Object> map=new HashMap<String,Object>();
    	List<String> imgList=new ArrayList<>();
    	
    	String regex = "<img[^>]+src\\s*=\\s*['\"]([^'\"]+)['\"][^>]*>";
        content = content.replaceAll("(style=)","$13D");
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(content);
        String src = "";
        String srcPath=request.getSession().getServletContext().getRealPath("/");
        while (matcher.find()){
        	try{
        		src = matcher.group(1);
        		if(src.indexOf("http")==0){
        			//新的图片名称 他的路径是  https://xxxxx.jpg  ==> md5()+".png"
        			String newSrc=Md5Util.getMD5Lower(src)+".png";
        			//存放到某个位置
        			String srcRealPathFile = srcPath + newSrc;
        			File newFile=new File(srcRealPathFile);
        			//不存在时才去网络下载到指定文件夹下
        			if(!newFile.exists()){
        				FileUtils.copyURLToFile(new URL(src), newFile);
        			}
        			//把图片内容修改为mhtm可读的标签形式
    				content = content.replaceFirst(regex, appendShap(newSrc));
        			imgList.add(newSrc);//记录图片路径
        		}
        	}catch(Exception e){
        		e.printStackTrace();
        	}
        }
        
        map.put("content", content);
        map.put("imgList", imgList);
        return map;
    }
    
    //获得图片的base64码
    public String getImageBase(HttpServletRequest request,String src) {
        File file = new File(request.getSession().getServletContext().getRealPath("/")+src.replace(request.getContextPath(), ""));
        if(!file.exists()) {
            return "";
        }
        InputStream in = null;
        byte[] data = null;  
        try {
            in = new FileInputStream(file);
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        }
        try {  
            data = new byte[in.available()];  
            in.read(data);  
            in.close();  
        } catch (IOException e) {  
          e.printStackTrace();  
        } 
        return new BASE64Encoder().encode(data);
    }
    
    private String appendShap(String str){
        String shape = "<v:shape type=3D\"#_x0000_t75\" style=3D'width:" + 100 + ";height:" + 100 + "'>"
                + "<v:imagedata src=3D\"file8676.files/" + str + " \"o:title=3D" + str + "\"/>"
                + "</v:shape>";
        return shape;
    }
    
    //这里面要注意的一个问题是type=3D\"#_x0000_t75\ 这是一定要加上的不然在2003中能看到图片，到了2007中就看不到了action
    @GetMapping("/download-meeting-summary")
    public void exportBlog(@RequestParam(value="meetingid",required=true) Integer meetingId,HttpServletResponse response, HttpServletRequest request) throws UnsupportedEncodingException {
        response.addHeader("Content-Disposition","attachment;filename="+ new String("组织生活".getBytes("GBK"), "iso-8859-1") + ".doc");
        response.setContentType("application/x-download");// 设置为下载application/x-download
        response.setCharacterEncoding("utf-8");
        PrintWriter output = null;
        try {
        	
        	Map<String,Object> dataMap = new HashMap<String,Object>();//填充的数据
        	
            output = response.getWriter();
            
            String content=meetingFacade.getSummary(meetingId);
            
            Map<String,Object> setMap=exImageToD(request,content);
            dataMap.put("content", setMap.get("content"));
            dataMap.put("title", "组织生活");
            List<String> srcs = (List<String>) setMap.get("imgList");
            Map<String, String> imageMap = null;
            List<Map<String, String>> list = new ArrayList<Map<String,String>>();
            String[] sp = null;
            for(String src : srcs){
                sp = src.split("/");
                imageMap = new HashMap<String, String>();
                imageMap.put("imageName", sp[sp.length-1]);
                imageMap.put("imageType", sp[sp.length-1].split("\\.")[1]);
                imageMap.put("imageBase", getImageBase(request,src));
                list.add(imageMap);
            }
            dataMap.put("imageList", list);
            createDoc(dataMap,output);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            output.flush();
            output.close();
        }
    }
}

输出word内容

"java-cdnword"

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tag:

    缺失模块。
    1、在博客根目录（注意不是yilia根目录）执行以下命令：
    npm i hexo-generator-json-content --save

    2、在根目录_config.yml里添加配置： 

      jsonContent:
    meta: false
    pages: false
    posts:
      title: true
      date: true
      path: true
      text: true
      raw: false
      content: false
      slug: false
      updated: false
      comments: true
      link: false
      permalink: false
      excerpt: false
      categories: false
      tags: true

90后,水瓶男,爱自由,充满幻想<br>有点小暴冲动,时而含蓄时而不含蓄