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一、element-ui 1、安装依赖Element组件库中的el-table表格导出需要的主要是两个依赖:(xlsx 和 file-saver) npm install --save xlsx file-saver 2、页面 <el-tooltip content="导出数据" placement="top"> <el-button type="warning" plain @click="exportExcel()">导出</el-button> </el-button> </el-tooltip> <el-table v-loading="loading" element-loading-text="拼命加载中" element-loading-spinner="el-icon-loading" element-loading-background="rgba(0, 0, 0, 0.8)" :data="dataList" class="table" id="out-table" :header-cell-style="{background:"rgb(48, 65, 86)",color:"white"}" border> <el-table-column type="index" /><el-table-column prop="param" label="参数" />

I currently have a MediaStream which is being recorded using MediaRecorder . At the end of the recording after recorder.stop() , it produce a Blob and I am able to play that video back. My goal is to play not the entire video at the end, but play a chunk while recording . For the moment, a chunk is not playable while recording is not ended. How can i do that using javascript? The final objective is to send a chunk by websocket that is playable even if recording is in action. I am not able to bring new solutions. Can anyone help or at least explain me the things ? What I've tried was navigator

I have this SQLite table: create table mytable ( aid INTEGER NOT NULL PRIMARY KEY, bid INTEGER NOT NULL, image BLOB ); And I want to insert a binary file into the image field in this table. Is it possible to do it from the sqlite3 command line interface? If so, how? I'm using Ubuntu. Thank you! You may use a syntax like : echo "insert into mytable values(1,1, \"`cat image`\")" | sqlite3 yourDb i'm not sure for the " around blob's value. Note the backquotes around cat command, means the cat command will be executed before the echo. [EDIT] Blob are stored as hexa digit with "X" prefix. You can

I'm facing this issue only in my application irrespective of browser (IE & Chrome). If I check window.URL.createObjectURL(blob) in console of any other page in both the browsers, its working fine. But it window.URL.createObjectURL(blob) is getting undefined only in the tab in which I open my application :( I'm not sure, which library is removing "createObjectURL" method. following are my scripts <script src="src/js/libs/jquery/dist/jquery.js"></script> <script src="src/js/libs/toastr/toastr.js"></script> <script src="src/js/libs/moment/moment.js"></script> <script src="src/js/libs/bootstrap

I have a file as a byte[] fileContent. My mySql-scheme is generated by Hibernate and by default hibernate sets the sql-type of fileContent to BLOB. But a BLOB is not big enough for my files. I will need at least a MEDIUMBLOM or even a LONGBLOB. But how can i annotate my field so that Hibernate will generate the scheme with my field as a LONGBLOB? I have search google for 2 hours now without getting anything... Shouldn't this be a so simple and common task that it should be documented somewhere?? Please help a frustrated programmer!! @WhatAnnotationCanIUseToForceHibernateToMakeThisALONGBLOB????

Hi i want to create a blob in hibernate from an inputstream, but i don't know the length of the stream. Hibernate.getLobCreator(sessionFactory.getCurrentSession()).createBlob(stream, length) how can i crate a blob without knowing the length of the stream? EDIT1 in older hibernate versions it was possible http://viralpatel.net/blogs/tutorial-save-get-blob-object-spring-3-mvc-hibernate/ Blob blob = Hibernate.createBlob(file.getInputStream()); EDIT2 ok but it had an buggy implementation return new SerializableBlob( new BlobImpl( stream, stream.available() ) ); stream.available isn't the real size

I have experience using MSSQL 2008 and I recently had to move from MSSQL to Oracle 10g. The people who designed the (Oracle) table, which has a column I need to extract data from, used a BLOB type column for the XML they need to store. In MSSQL you would have simply stored your XML string in an XML type or used a VARCHAR(MAX) . Assume a table myTable with a column called myColumn which is a VARCHAR(MAX) containing <ROOT><a>111</a></ROOT> If you wanted to convert the VARCHAR(MAX) type to an XML type you would simply write something like: SELECT CONVERT(XML, myColumn) FROM myTable if you wanted,

之前的代码 使用FileReader 读取流文件 会受到chrome浏览器的文件传输的大小限制; 现在改为 URL.createObjectURL 方法导出 不受chrome浏览器文件传输限制 let xhr = new XMLHttpRequest(); xhr.open("GET", url, true); // 也可以使用POST方式，根据接口 xhr.responseType = "blob"; // 返回类型blob，XMLHttpRequest支持二进制流类型 xhr.onload = function() { if (this.status === 200) { let blob = this.response; //使用response作为返回，而非responseText const objectURL = URL.createObjectURL(new Blob([blob], { type: 'text/xls' })) // chrome不受文件你大小限制导出文件 // let reader = new FileReader(); // reader.readAsDataURL(blob); // 转换为base64，可以直接放入a标签href // objectURL.onload = function(e) { // 转换完成，创建一个a标签用于下载

//创建 XMLHttpRequest 对象 var xhr = new XMLHttpRequest(); //配置请求方式、请求地址以及是否同步 xhr.open('POST', './play', true); //设置请求结果类型为 blob xhr.responseType = 'blob'; //请求成功回调函数 xhr.onload = function(e) { if (this.status == 200) { //请求成功 //获取 blob 对象 var blob = this.response; //获取 blob 对象地址，并把值赋给容器 $("#sound").attr("src", URL.createObjectURL(blob));}}; xhr.send(); 来源： https://www.cnblogs.com/yishenweilv/p/11906391.html