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前端各种文本文件预览 文本编辑excel预览编辑 pdf预览word预览 excel下载pdf下载word下载

各种文本文件预览（pdf, xlsx, docx, cpp, java, sql, py, vue, html, js, json, css, xml, rust, md, txt, log, fa, fasta, tsv, csv 等各种文本文件）
其中 除pdf，xlsx，docx之外的文本还可以修改，xlsx想要修改看我另一篇博客luckyexcel 编辑预览excel文件

引入库

//预览编辑文本用"@codemirror/lang-cpp": "^6.0.2","@codemirror/lang-css": "^6.2.1","@codemirror/lang-html": "^6.4.9","@codemirror/lang-java": "^6.0.1","@codemirror/lang-javascript": "^6.2.2","@codemirror/lang-json": "^6.0.1","@codemirror/lang-markdown": "^6.2.5","@codemirror/lang-python": "^6.1.6","@codemirror/lang-rust": "^6.0.1","@codemirror/lang-sql": "^6.7.0","@codemirror/lang-vue": "^0.1.3","@codemirror/lang-xml": "^6.1.0","@codemirror/theme-one-dark": "^6.1.2","codemirror": "^6.0.1",//预览word、pdf、excel文件用"@vue-office/docx": "^1.6.2","@vue-office/excel": "^1.7.11","@vue-office/pdf": "^2.0.2",//导出word"buffer": "^6.0.3","docxtemplater": "^3.46.0","file-saver": "^2.0.5","pizzip": "^3.1.6","jszip-utils": "^0.1.0",//导出pdf"html2canvas": "^1.4.1","jspdf": "^2.5.1",//导出xlsx文件（试用于electron，web也可以用）"node-xlsx": "^0.23.0",//或者用xlsx库"xlsx": "^0.18.5"

导出pdf、xlsx、word文件

<template><div class="content" id="exportPdf"><a-space><a-button type="primary" @click="exportWord">导出word</a-button><a-button type="primary" @click="exportXlsx">导出elcel</a-button><a-button type="primary" @click="exportPdf">导出pdf</a-button><a-button type="primary" @click="() => router.push('/preview')">文件预览</a-button></a-space><br /><br /><hr /><div class="flex flex-justify-around"><div>unocss</div><div>测试</div><div>可以用的</div></div><br /><div class="text-center"><a href="https://unocss.dev/interactive/" target="_blank" rel="noopener noreferrer">unocss 文档</a></div></div>
</template><script lang="ts" setup>import { useRouter } from 'vue-router';
import { setLogin, getUserInfo } from '../../serve/api/login';
import { globalData } from '../../setting/global';import { Buffer } from 'buffer';
import xlsx from 'node-xlsx';import docxtemplater from 'docxtemplater';
import PizZip from 'pizzip';
import JSZipUtils from 'jszip-utils';
import { saveAs } from 'file-saver';import html2canvas from 'html2canvas';
import JsPDF from 'jspdf';const router = useRouter();const tableValue = reactive({unit: '中国',date: undefined,sampleType: '你猜',people: '黄种人',name: '夜空',sex: '男',age: '25',work: '开发',id: '',jiance: '商品化试剂盒',date2: undefined,
});
const exportWord = () => {let docxname = '导出word.docx';JSZipUtils.getBinaryContent('/template.docx', function (error: any, content: any) {// template.docx是模板（这里我放到public公共文件夹下面了）。我们在导出的时候，会根据此模板来导出对应的数据// 抛出异常if (error) {throw error;}// 创建一个PizZip实例，内容为模板的内容let zip = new PizZip(content);// 创建并加载docx templater实例对象let doc = new docxtemplater().loadZip(zip);// 设置模板变量的值  主要变量替换在这里doc.setData({name: tableValue.name,unit: tableValue.unit,date: '这里也不可以不写变量',sampleType: tableValue.sampleType,sex: tableValue.sex,age: tableValue.age,});try {// 用模板变量的值替换所有模板变量doc.render();} catch (error: any) {// 抛出异常let e = {message: error.message,name: error.name,stack: error.stack,properties: error.properties,};console.log(JSON.stringify({error: e,}),);throw error;}// 生成一个代表docxtemplater对象的zip文件（不是一个真实的文件，而是在内存中的表示）let out = doc.getZip().generate({type: 'blob',mimeType: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',});// 将目标文件对象保存为目标类型的文件，并命名saveAs(out, docxname);});
};
const exportXlsx = () => {let data = [[1, 222, '', '', '', ''],['', 2, 3, 4, 5, 6],['', 2, 3, 4, 5, 6],['', 2, 3, 4, 5, 6],['', 2, 3, 4, 5, 6],[22, 2, 3, 4, 5, 6],];// 行列合并规则  c：col 列   r:row 行const range0 = { s: { c: 0, r: 0 }, e: { c: 0, r: 4 } };const range1 = { s: { c: 1, r: 0 }, e: { c: 5, r: 0 } };const sheetOptions = {'!merges': [range0, range1],// cols 列宽大小'!cols': [{ wch: 5 }, { wch: 10 }, { wch: 15 }, { wch: 20 }, { wch: 30 }, { wch: 50 }],};//如果不需要格式，这里的sheetOptions可以省略不写let result = xlsx.build([{ name: 'sheet1', data }], { sheetOptions });const ab = Buffer.from(result, 'binary');const blob = new Blob([ab]);const blobUrl = URL.createObjectURL(blob);const a = document.createElement('a');a.href = blobUrl;a.download = '导出excel.xlsx';a.click();window.URL.revokeObjectURL(blobUrl);
};
const exportPdf = () => {downloadPDF(document.querySelector('#exportPdf'), '导出pdf文件', pdfSuc(), 4);
};
const pdfSuc = () => {message.success('导出成功');
};
/*** ele:需要导出的容器* pdfName：导出文件的名字* callback: 成功回调*/
const downloadPDF = (ele: any, pdfName: any, callback: any, scale?: number) => {html2canvas(ele, {dpi: 600,scale: scale ? scale : 8,// allowTaint: true,  //允许 canvas 污染， allowTaint参数要去掉，否则是无法通过toDataURL导出canvas数据的useCORS: true, //允许canvas画布内 可以跨域请求外部链接图片, 允许跨域请求。width: ele.scrollWidth,height: ele.scrollHeight,}).then((canvas) => {//未生成pdf的html页面高度var leftHeight = canvas.height;var a4Width = 595.28;var a4Height = 801.89; //（一张A4高=841.89减去20，使得上下边距空出20,pdf.addImage生成上边距（第四个参数=10）致使使得上下边距各10）//一页pdf显示html页面生成的canvas高度;var a4HeightRef = Math.floor((canvas.width / a4Width) * a4Height);//pdf页面偏移var position = 0;var pageData = canvas.toDataURL('image/jpeg', 1.0);var pdf = new JsPDF('x', 'pt', 'a4');var index = 1,canvas1 = document.createElement('canvas'),height;pdf.setDisplayMode('fullwidth', 'continuous', 'FullScreen');function createImpl(canvas) {if (leftHeight > 0) {index++;var checkCount = 0;if (leftHeight > a4HeightRef) {var i = position + a4HeightRef;for (i = position + a4HeightRef; i >= position; i--) {var isWrite = true;for (var j = 0; j < canvas.width; j++) {var c = canvas.getContext('2d').getImageData(j, i, 1, 1).data;if (c[0] != 0xff || c[1] != 0xff || c[2] != 0xff) {isWrite = false;break;}}if (isWrite) {checkCount++;if (checkCount >= 10) {break;}} else {checkCount = 0;}}height = Math.round(i - position) || Math.min(leftHeight, a4HeightRef);if (height <= 0) {height = a4HeightRef;}} else {height = leftHeight;}canvas1.width = canvas.width;canvas1.height = height;var ctx = canvas1.getContext('2d');ctx.drawImage(canvas, 0, position, canvas.width, height, 0, 0, canvas.width, height);if (position != 0) {pdf.addPage();}// 在pdf.addImage(pageData, 'JPEG', 左间距，上间距，宽度，高度)设置在pdf中显示；pdf.addImage(canvas1.toDataURL('image/jpeg', 1.0),'JPEG',70,56,a4Width - 140,(a4Width / canvas1.width) * height - 112,);leftHeight -= height;position += height;if (leftHeight > 0) {setTimeout(createImpl, 500, canvas);callback();} else {pdf.save(pdfName);callback();}}}// 当内容未超过pdf一页显示的范围，无需分页if (leftHeight < a4HeightRef) {pdf.addImage(pageData, 'JPEG', 0, 50, a4Width, (a4Width / canvas.width) * leftHeight);pdf.save(pdfName);// callback();} else {try {pdf.deletePage(0);setTimeout(createImpl, 500, canvas);} catch (err) {console.log(err);}}});
};
</script><style lang="less" scoped>
.content {width: 90vw;min-height: 90vh;margin: 5vh auto;padding: 20px;outline: 1px dashed #999;
}
</style>

预览各种文本

<!--* @Descripttion:* @Author: 苍狼一啸八荒惊* @Date: 2024-08-12 12:18:53* @LastEditTime: 2024-08-13 15:27:27* @LastEditors: 夜空苍狼啸
-->
<script lang="ts" setup>
// ! 目前不支持doc、xls格式文件的预览
//引入VueOfficeDocx组件
import VueOfficeDocx from '@vue-office/docx';
import '@vue-office/docx/lib/index.css';//引入VueOfficeExcel组件
import VueOfficeExcel from '@vue-office/excel';
import '@vue-office/excel/lib/index.css';//引入VueOfficePdf组件
import VueOfficePdf from '@vue-office/pdf';import { message } from 'ant-design-vue';
import { useRouter } from 'vue-router';
const router = useRouter();
const fileText: any = undefined;
const data = reactive({loading: false,fileList: [],fileType: 'xlsx',//   docxSrc: 'http://static.shanhuxueyuan.com/test6.docx',//   excelSrc: 'http://static.shanhuxueyuan.com/demo/excel.xlsx',docxSrc: '',excelSrc: '/template.xlsx',pdfSrc: '',codemirror: false,fileText,refreshCodemirrorKey: 0,
});
const customUpload = async (info: any) => {data.loading = true;console.log(info);let suffixName = info.file.name.split('.').pop();data.fileType = suffixName;data.codemirror = false;let fileReader = new FileReader();fileReader.readAsArrayBuffer(info.file);if (['docx', 'doc'].includes(suffixName)) {if (suffixName === 'doc') {message.info('请上传docx格式的文件');return;}fileReader.onload = () => {data.docxSrc = fileReader.result;};} else if (['xlsx', 'xls'].includes(suffixName)) {if (suffixName === 'xls') {message.info('请上传xlsx格式的文件');return;}fileReader.onload = () => {data.excelSrc = fileReader.result;};} else if (['pdf'].includes(suffixName)) {fileReader.onload = () => {data.pdfSrc = fileReader.result;};} else if (['cpp', 'java', 'sql', 'py', 'vue', 'html', 'js', 'json', 'css', 'xml', 'rust', 'md'].includes(suffixName,)) {// 文本，启用 Codemirrordata.codemirror = true;data.fileText = await readFileAsync(info.file);data.refreshCodemirrorKey++;} else {// message.info('该格式暂不支持查看！');data.codemirror = true;data.fileText = await readFileAsync(info.file);data.refreshCodemirrorKey++;}data.loading = false;
};
const handleChange = async (e: any) => {let file = e.target.files[0];let suffixName = file.name.split('.').pop();data.fileType = suffixName;data.codemirror = false;let fileReader = new FileReader();fileReader.readAsArrayBuffer(file);if (['docx', 'doc'].includes(suffixName)) {if (suffixName === 'doc') {message.info('请上传docx格式的文件');return;}fileReader.onload = () => {data.docxSrc = fileReader.result;};} else if (['xlsx', 'xls'].includes(suffixName)) {if (suffixName === 'xls') {message.info('请上传xlsx格式的文件');return;}// 使用blob文件流let blob = new Blob([file], {type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',});data.excelSrc = URL.createObjectURL(blob);// 读取文件的ArrayBuffer// fileReader.onload = () => {//   data.excelSrc = fileReader.result;// };// data.excelSrc = URL.createObjectURL(file);} else if (['pdf'].includes(suffixName)) {fileReader.onload = () => {data.pdfSrc = fileReader.result;};} else if (['txt', 'vue', 'json', 'java', 'sql', 'js', 'css', 'xml', 'html', 'yaml', 'md', 'py'].includes(suffixName,)) {// 文本，启用 Codemirrordata.codemirror = true;data.fileText = await readFileAsync(file);data.refreshCodemirrorKey++;} else {// message.info('该格式暂不支持查看！');data.codemirror = true;data.fileText = await readFileAsync(file);data.refreshCodemirrorKey++;}
};
const rendered = () => {console.log('渲染完成');
};
const errorHandler = () => {console.log('渲染失败');
};// 读取文本文件内容
const readFileAsync = (file: Blob | File) => {return new Promise((resolve, reject) => {// 读取文件里面的内容返回var reader = new FileReader();// 以文本格式读取文件reader.readAsText(file, 'UTF-8');reader.onload = function (event) {resolve(event.target.result);};reader.onerror = function (event) {reject(event.target);};});
};onMounted(() => {});
</script>
<template><div class="content"><div class="mb-1 color-red-500">支持预览文件: pdf, xlsx, docx, cpp, java, sql, py, vue, html, js, json, css, xml, rust, md,txt, log, fa, fasta, tsv, csv 等各种文本文件</div><a-space class="mb-1"><!-- accept="application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" --><a-uploadv-model:file-list="data.fileList":customRequest="customUpload"name="file":multiple="false":showUploadList="false"><a-button :loading="data.loading" type="primary">上传文件</a-button></a-upload><input type="file" ref="fileButton" @change="handleChange" /><a-button type="primary" @click="() => router.push('/index')">文件导出</a-button></a-space><!-- office --><div v-if="!data.codemirror"><!-- docx --><vue-office-docxv-if="data.fileType === 'docx'":src="data.docxSrc"style="height: 80vh"@rendered="rendered"@error="errorHandler"/><!-- excel --><vue-office-excelv-else-if="data.fileType === 'xlsx'":src="data.excelSrc"style="height: 80vh"@rendered="rendered"@error="errorHandler"/><!-- pdf --><vue-office-pdfv-else-if="data.fileType === 'pdf'":src="data.pdfSrc"style="height: 100vh"@rendered="rendered"@error="errorHandler"/></div><!-- 文本 --><div v-else class="mt--6"><Codemirror :fileText="data.fileText" :fileType="data.fileType" /><!-- :key="data.refreshCodemirrorKey" --></div></div>
</template><style lang="less" scoped>
.content {width: 90vw;min-height: 90vh;margin: 5vh auto;padding: 20px;outline: 1px dashed #999;
}
</style>

子组件

<!--* @Descripttion: * @Author: 苍狼一啸八荒惊* @Date: 2024-08-12 13:51:19* @LastEditTime: 2024-08-13 15:36:07* @LastEditors: 夜空苍狼啸
--><script lang="ts" setup>
// codemirror api https://codemirror.net/docs/guide/
import { EditorState, Text, Compartment } from '@codemirror/state';
import { basicSetup, EditorView } from 'codemirror';
import { keymap, lineNumbers } from '@codemirror/view';
import { defaultKeymap } from '@codemirror/commands';
import { oneDark } from '@codemirror/theme-one-dark';import { json, jsonParseLinter } from '@codemirror/lang-json';
import { css } from '@codemirror/lang-css';
import { cpp } from '@codemirror/lang-cpp';
import { html } from '@codemirror/lang-html';
import { java } from '@codemirror/lang-java';
import { javascript as js } from '@codemirror/lang-javascript';
import { markdown as md } from '@codemirror/lang-markdown';
import { python as py } from '@codemirror/lang-python';
import { sql } from '@codemirror/lang-sql';
import { rust } from '@codemirror/lang-rust';
import { vue } from '@codemirror/lang-vue';
import { xml } from '@codemirror/lang-xml';
import { saveTextAsFile } from '/@/libs/utils/download';
const props = defineProps({fileText: {type: String,default: 'hello word!', //文本},fileType: {type: String,default: 'json', // 编辑模式(文件类型)},
});const data = reactive({fontSize: '14',theme: 'dark', // codeMirror主题readOnly: false,lineNumber: true,
});const editorRef: Ref<InstanceType<typeof Element> | undefined> = ref();onMounted(() => {});
onUnmounted(() => {view?.destroy();
});
watch(() => props.fileText,(n) => {init();},
);let view: any;
const init = () => {view?.destroy();let startState = EditorState.create({doc: props.fileText,extensions: [data.lineNumber ? basicSetup : [],data.theme == 'default' ? [] : oneDark,EditorState.readOnly.of(!data.readOnly),textType(props.fileType),// 自定义主题// EditorView.theme(//   {//     '&': {//       color: 'white',//       backgroundColor: '#034',//     },//     '.cm-content': {//       caretColor: '#0e9',//     },//     '&.cm-focused .cm-cursor': {//       borderLeftColor: '#0e9',//     },//     '&.cm-focused .cm-selectionBackground, ::selection': {//       backgroundColor: '#074',//     },//     '.cm-gutters': {//       backgroundColor: '#045',//       color: '#ddd',//       border: 'none',//     },//   },//   { dark: true },// ),],// extensions: [keymap.of(defaultKeymap)],});view = new EditorView({state: startState,parent: unref(editorRef),});
};
const textType = (type: string) => {// if (supportType.includes(type)) {//   // eval 将字符串转化为函数//   return eval(type + '()');// } else {//   return keymap.of(defaultKeymap);// }return type == 'json'? json(): type == 'css'? css(): type == 'cpp'? cpp(): type == 'html'? html(): type == 'java'? java(): type == 'js' || type == 'ts'? js(): type == 'md'? md(): type == 'py'? py(): type == 'sql'? sql(): type == 'rust'? rust(): type == 'vue'? vue(): type == 'xml'? xml(): keymap.of(defaultKeymap);
};
//节流
let timer_throttle: any;
const throttle = (fn: Function, wait?: number) => {wait = wait || 100;if (!timer_throttle) {timer_throttle = setTimeout(() => {fn.apply(this);timer_throttle = null;}, wait);}
};const handFontSize = (value: string) => {let cmContent = document.querySelector('.cm-content');if (cmContent) {cmContent.style.fontSize = value + 'px';}
};
const handTheme = (value: string) => init();const handLineNumber = (value: boolean) => init();const handReadOnly = (value: boolean) => init();
const saveFile = () => {console.log(view?.state.doc.toString());saveTextAsFile(view?.state.doc.toString(), 'newFile.' + props.fileType);
};
</script>
<template><div class="flex-end mt-2 mb-2"><a-space><a-button type="primary" v-if="data.readOnly" @click="saveFile">保存</a-button><a-select v-model:value="data.fontSize" class="w-px-100" @change="handFontSize"><a-select-option value="12">12px</a-select-option><a-select-option value="14">14px</a-select-option><a-select-option value="16">16px</a-select-option><a-select-option value="18">18px</a-select-option></a-select><a-select v-model:value="data.theme" class="w-px-100" @change="handTheme"><a-select-option value="default">默认</a-select-option><a-select-option value="dark">dark</a-select-option></a-select><a-switchchecked-children="显示行号"un-checked-children="不显示"v-model:checked="data.lineNumber"@change="handLineNumber"/><a-switchchecked-children="可编辑"un-checked-children="不可编辑"v-model:checked="data.readOnly"@change="handReadOnly"/></a-space></div><div ref="editorRef"></div><!-- <CodemirrorCodemirror :value="fileText" :fileType :lineNumber :readOnly :theme="data.theme" /> -->
</template><style lang="less" scoped></style>