VSCode+Maven+Hadoop开发环境搭建
293 2023-04-03 03:41:30
直接上代码
<!DOCTYPE html><html><head><meta charset="utf-8"><title>本地文件读写</title></head><script type="text/javascript">(function (console) { console.save = function (data, filename) { if (!data) { console.error('No data'); return; } if (!filename) filename = 'data.json'; if (typeof data === "object") { data = JSON.stringify(data, undefined, 4) } var blob = new Blob([data], {type: 'text/json'}), e = document.createEvent('MouseEvents'), a = document.createElement('a'); a.download = filename; a.href = window.URL.createObjectURL(blob); a.dataset.downloadurl = ['text/json', a.download, a.href].join(':'); e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); a.dispatchEvent(e) } })(console);var arr = new Array();var temp_str ="";var i = 0;function showPreview(source){var input = source;var reader = new FileReader();reader.readAsText(input.files[0]);reader.onload = function() {if(reader.result) { //显示文件内容temp_str = reader.result;}};}function showText(){if(temp_str==""){alert("请先上传文件");}else{document.getElementById("text").innerHTML=temp_str;}}function saveText(){var text = document.getElementById("text").value;if(text==""){alert("没有内容");}else{console.save(text,"data.json");}}</script><body><div style="display: flex; justify-content: center;"><div id="div" align="center" style="width: 300px;height: 600px; background-color: #eee;"><br><input type="file" name="file" value="上传文件" onchange="showPreview(this)" /><br><br><br><br><br><input type="button" value="显示文件内容" onclick="showText()"><br><br><input type="button" value="另存文件内容" onclick="saveText()"></div><div id="div" align="center" style="width: 1000px;height: 600px; background-color: #000000;"><textarea id="text"style="width: 1000px;height: 600px; background-color: #000000; color: #ffffff;"></textarea></div></div></body></html>