vue 预览 word

慈云数据 2024-03-25 技术支持 74 0

最近做的项目要求实现预览word, pdf,png等文件功能,pdf以及png都很简单,轻松百度搞定,但是word预览研究了好久,所以特此记录分享。

前端实现预览word分为两种,一种是上传前预览(也就是前端使用input或者组件等选择文件后直接预览,此时还没有上传给后端,我定义为纯前端预览),一种是上传后预览(就是文档已经上传到后端,通过后端给的文件流实现预览)

一、先说第一种的实现方式:

首先下载安装docx-preview,引入

npm install xlsx docx-preview --save
import { defaultOptions, renderAsync } from "docx-preview";
var docxx = require("docx-preview");

我这里使用的是element ui 上传组件

 
      上传附件
    

选择文件以后

myUpload(content){
      console.log(content);
      const downUrl = URL.createObjectURL(content.file)
      const a = document.createElement('a');
      this.$refs.selectFileNameBox.innerHTML = "";
      this.$refs.selectFileNameBox.append(a);
      a.innerHTML = content.file.name;
      a.href = downUrl
      a.download = content.file.name;
      a.target = '_blank';
      const addTypeArray = content.file.name.split(".");
      const addType = addTypeArray[addTypeArray.length - 1];
      console.log(addType);
      
      this.uploadFileName = content.file.name;
      this.uploadFileObj = content.file;
      if (addType === "pdf") {
        const url = URL.createObjectURL(content.file);
        console.log(url);
        this.xzbjPreviewIframeSrc = url;
        this.xzbjIframeIsShow = true;
        this.xzbjDialogPreviewDiv = false;
        this.xzbjPreviewImgUrl = "";
        this.xzbjDocPreviewFlag = false;
       
        this.previewBoxStyle = "height:400px;position: relative;overflow:hidden;"
        
      }
      else if(addType === "doc" || addType === "docx" || addType === "word"){
        console.log("word文件预览")
        this.xzbjPreviewImgUrl = "";
        this.xzbjPreviewIframeSrc = "";
        this.xzbjDialogPreviewDiv = false;
        this.xzbjDocPreviewFlag = true;
        this.xzbjIframeIsShow = false;
        // 将file转为buffer
        let fr = new FileReader();
        fr.readAsArrayBuffer(content.file);
        fr.addEventListener("loadend",(e) => {
            console.log("loadend---->", e)
            let buffer = e.target.result;
            this.docxRender(buffer);
        },false);
       
        
       
      }
      //".rar, .zip, .doc, .docx, .xls, .txt, .pdf, .jpg,  .png, .jpeg,"
      else if (["png", "jpg", "jpeg","bmp"].includes(addType)) {
        this.xzbjPreviewIframeSrc = "";
        this.xzbjIframeIsShow = false;
        this.xzbjDocPreviewFlag = false;
        this.imgPreview(content.file);
        
        this.previewBoxStyle = "height:400px;position: relative;overflow:auto;"
        
      } else if (addType === "rar" || addType === "zip" || addType === "7z") {
        this.filePreviewInfo = "请下载附件进行查看"
        this.xzbjPreviewImgUrl = "";
        this.xzbjPreviewIframeSrc = "";
        this.xzbjDocPreviewFlag = false;
        this.xzbjDialogPreviewDiv = true;
        this.$message({
          message: "该文件类型暂不支持预览",
          type: "warning",
        });
        return false;
      }else{
        this.filePreviewInfo = "该文件类型暂不支持预览"
        this.xzbjPreviewIframeSrc = "";
        this.xzbjIframeIsShow = false;
        this.xzbjDialogPreviewDiv = true;
        this.xzbjPreviewImgUrl = "";
        this.xzbjDocPreviewFlag = false;
        this.$message({
          message: "请仅允许上传后缀为pdf、doc、docx、word、jpg、png、bmp、rar、zip、7z的附件",
          type: "warning",
        });
      }
    }
// 渲染docx
    docxRender(buffer) {
      let bodyContainer = document.getElementById("demoDocContainer");
      renderAsync(
          buffer, // Blob | ArrayBuffer | Uint8Array, 可以是 JSZip.loadAsync 支持的任何类型
          bodyContainer, // HTMLElement 渲染文档内容的元素,
          null, // HTMLElement, 用于呈现文档样式、数字、字体的元素。如果为 null,则将使用 bodyContainer。
          this.docxOptions // 配置
      ).then(res => {
          console.log("res---->", res)
      })
    },

下面是图片预览核心代码

 imgPreview(file) {
      // 看支持不支持FileReader
      if (!file || !window.FileReader) return;
      // console.log(/^image/.test(file.type), "---/^image/.test(file.type)")
      if (/^image/.test(file.type)) {
        // 创建一个reader
        let reader = new FileReader();
        // 将图片将转成 base64 格式
        reader.readAsDataURL(file);
        // 读取成功后的回调
        reader.onload = ({ target }) => {
          this.xzbjDialogPreviewDiv = false;
          this.xzbjPreviewImgUrl = target.result; //将img转化为二进制数据
          // console.log("target:", target);
        };
      }
    },

这样就实现了纯前端预览word功能

二、接下来实现 配合后端预览word

根据后端返回的流预览word

request({
    method: "get",
    url: "/notice/noticeFileView",
    responseType: 'blob',
    params:{
    id:row.id
    },
    headers: {
    "Content-Type": 'application/json'
    },
    }).then(res=>{
    console.log(res,"---文件预览");
    
    if(row.suffix.includes("pdf")){
    this.previewPdfFn(res);
    // let blob = new Blob([res],{
    //   type: 'application/pdf'
    // })
    // let url = window.URL.createObjectURL(blob);
    this.xqPreviewImgUrl =  "";
    this.xqPreviewPdfUrl = this.previewPdfFn(res);
    this.xqPdfPreviewFlag = true; 
    this.xqDocPreviewFlag = false;
    this.xqPerviewStyle = "height:600px;position: relative;overflow:hidden"
    }else if(row.suffix.includes("docx") || row.suffix.includes("doc")|| row.suffix.includes("word")){
    console.log("预览word")
    this.xqDocPreviewFlag = true;
    let blob = new Blob([res],{
      type: 'application/pdf'
    })
    this.$nextTick(()=>{
      console.log(this.$refs.xqDocContainer,"---this.$refs.xqDocContainer")
      docxx.renderAsync(blob, this.$refs.xqDocContainer)
    })
    
    } else if (row.suffix === ".rar" || row.suffix === ".zip" || row.suffix === "7z") {
    this.xqDocPreviewFlag = false;
    this.xzbjPreviewImgUrl = "";
    this.xzbjPreviewIframeSrc = "";
    this.$message({
      message: "该文件类型暂不支持预览",
      type: "warning",
    });
      return false;
    }else if([".png", ".jpg", ".jpeg",".bmp"].includes(row.suffix)){
    let blob = new Blob([res],{
      type: 'application/pdf'
    })
    console.log(blob,"---blob")
    let url = window.URL.createObjectURL(blob);
    this.xqPreviewImgUrl =  url; 
    this.xqPdfPreviewFlag = false; 
    this.xqDocPreviewFlag = false;
    this.xqPreviewPdfUrl = "";
    this.xqPerviewStyle = "height:600px;position: relative;overflow:auto"
    }
    
    this.xqDialogPreviewDiv = false;
    }).catch(err=>{
    console.log(err,"--文件预览失败")
    })

完毕

下面是参考链接:

https://www.jianshu.com/p/8e1e90570c52 预览word excel

https://blog.csdn.net/kaimo313/article/details/127012225 vue里使用docx-preview预览docx文件

https://volodymyrbaydalka.github.io/docxjs/

最后是一个好友赠送的组件

  
    

import { defaultOptions, renderAsync } from "docx-preview"; console.log(defaultOptions); export default { name: 'DocxPreview', data () { return { docxOptions: { className: "kaimo-docx-666", // string:默认和文档样式类的类名/前缀 inWrapper: true, // boolean:启用围绕文档内容的包装器渲染 ignoreWidth: false, // boolean:禁用页面的渲染宽度 ignoreHeight: false, // boolean:禁止渲染页面高度 ignoreFonts: false, // boolean:禁用字体渲染 breakPages: true, // boolean:在分页符上启用分页 ignoreLastRenderedPageBreak: true, // boolean:在 lastRenderedPageBreak 元素上禁用分页 experimental: false, // boolean:启用实验功能(制表符停止计算) trimXmlDeclaration: true, // boolean:如果为true,解析前会从​​ xml 文档中移除 xml 声明 useBase64URL: false, // boolean:如果为true,图片、字体等会转为base 64 URL,否则使用URL.createObjectURL useMathMLPolyfill: false, // boolean:包括用于 chrome、edge 等的 MathML polyfill。 showChanges: false, // boolean:启用文档更改的实验性渲染(插入/删除) debug: false, // boolean:启用额外的日志记录 } }; }, methods: { getFile(){ this.handlePreview() }, handlePreview() { let file = document.getElementById("file").files[0]; console.log(file); // 将file转为buffer let fr = new FileReader(); fr.readAsArrayBuffer(file); fr.addEventListener("loadend",(e) => { console.log("loadend---->", e) let buffer = e.target.result; this.docxRender(buffer); },false); }, // 渲染docx docxRender(buffer) { let bodyContainer = document.getElementById("bodyContainer"); renderAsync( buffer, // Blob | ArrayBuffer | Uint8Array, 可以是 JSZip.loadAsync 支持的任何类型 bodyContainer, // HTMLElement 渲染文档内容的元素, null, // HTMLElement, 用于呈现文档样式、数字、字体的元素。如果为 null,则将使用 bodyContainer。 this.docxOptions // 配置 ).then(res => { console.log("res---->", res) }) } }, };

结束啦,每天进步一点点,早日成为大神。啦啦啦

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