本篇文章給大家帶來的內容是關於JavaScript實現模板生成大量數據的方法（附代碼），有一定的參考價值，有需要的朋友可以參考一下，希望對你有所幫助。
有時需要根據模板生成大量數據，這個代碼工具簡直就是神器。
基本思路就是：
- 解析模板數據，將替換的內容解析出來
- 解析輸入數據，使用\t,\n將原始數據進行切分
- 進行數據替換，然後輸出。
此處用jquery實現元素的選擇，使用vue.js實現邏輯與展示的分離。
示例結果如下：
代碼如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>模板生成器</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/vue/2.5.22/vue.min.js"></script>
<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<script>
$(document).ready(function () {
function combineTemplateAndInput(template, input) {
if (!template || !input) {
return "";
}
var inputLines = input.split('\n');
var inputCount = 0;
// 統計數據的數量個數
for (var i = 0; i < inputLines.length; i++) {
var line = inputLines[i];
if (line) {
inputCount++;
}
}
// 替換數據
var resLines = [];
var inputIndex = 1;
for (var i = 0; i < inputLines.length; i++) {
var line = inputLines[i];
// 忽略了空行
if (!line) {
resLines.push("");
continue;
}
// 將數據按\t分隔生成$1=xx,$2=xx,$3=xx
var dColumns = line.split('\t');
var mColumnData = {};
for (var j = 0; j < dColumns.length; j++) {
mColumnData['$' + (1 + j)] = dColumns[j];
}
var resLine = template;
// 先進行$?,$#這些替換，避免數據中的相同格式干擾
// 替換$?，下標
resLine = resLine.replace(/(\$\?)/g, inputIndex);
// 替換$#，數據數量
resLine = resLine.replace(/(\$#)/g, inputCount);
// 替換$0，整行數據
resLine = resLine.replace(/(\$0)/g, line);
// 找出模板中的`$數字`格式的內容，並進行替換
resLine = resLine.replace(/(\$\d+)/g, function (match, p1) {
if (mColumnData[p1]) {
return mColumnData[p1];
}
return "";
});
// 找出模板中`${數字}`格式的內容，進行替換
resLine = resLine.replace(/(\$\{\d+\})/g, function (match, p1) {
if (mColumnData[p1]) {
return mColumnData[p1];
}
return "";
});
inputIndex++;
resLines.push(resLine);
}
return resLines.join("");
}
var vm = new Vue({
el: "#container",
data: {
inputTemplate: [
"mkdir -p $4",
"touch $4$2.proto",
"\n"
].join("\n"),
inputContent: [
"/abc/getNearbyOrgs/1.0 GetNearbyOrgs GetNearbyOrgs.proto abc/ getNearbyOrgs /abc/getNearbyOrgs/1.0",
"/abc/getOrgByArea/1.0 GetOrgByArea GetOrgByArea.proto abc/ getOrgByArea /abc/getOrgByArea/1.0",
"/abc/addFeedback/1.0 AddFeedback AddFeedback.proto abc/ addFeedback /abc/addFeedback/1.0",
"/abc/getOrgCities/1.0 GetOrgCities GetOrgCities.proto abc/ getOrgCities /abc/getOrgCities/1.0",
"/abc/getServiceInfo/1.0 GetServiceInfo GetServiceInfo.proto abc/ getServiceInfo /abc/getServiceInfo/1.0",
"/hello/sayNearbyOrgs/1.0 sayNearbyOrgs sayNearbyOrgs.proto hello/ sayNearbyOrgs /hello/sayNearbyOrgs/1.0",
"/hello/sayOrgByArea/1.0 sayOrgByArea sayOrgByArea.proto hello/ sayOrgByArea /hello/sayOrgByArea/1.0",
"/hello/sayOrgCities/1.0 sayOrgCities sayOrgCities.proto hello/ sayOrgCities /hello/sayOrgCities/1.0",
"/hello/sayServiceInfo/1.0 sayServiceInfo sayServiceInfo.proto hello/ sayServiceInfo /hello/sayServiceInfo/1.0"
].join("\n"),
outputContent: "",
msg:{
title:"幫助",
content:[
"$?: 數據的順序，從1開始，不含空行",
"$#: 數據的數量，不含空行",
"$0: 原始數據，整行數據",
"$數字: $1,$2,...，表示第1,2,...列數據",
"${數字}: ${11},${12},...，表示第11,12,...列數據，用於去除$11與$1的混淆(暫未實現)"
].join("<br/>")
}
},
methods: {
aiGen: function () {
var self = this;
self.outputContent = combineTemplateAndInput(self.inputTemplate, self.inputContent);
},
clearInputContent:function () {
var self = this;
self.inputContent = "";
},
clearInputTemplate:function () {
var self = this;
self.inputTemplate = "";
},
clearOutputContent:function () {
var self = this;
self.outputContent = "";
}
}
});
});
</script>
</head>
<body>
<div id="container" class="container ">
<div>
<div class="col-lg-12 col-sm-12 col-md-12 col-xs-12">
<h3>模板生成器</h3>
</div>
<div class="col-lg-12 col-sm-12 col-md-12 col-xs-12 bs-callout bs-callout-warning">
<div class="alert alert-warning" v-html="msg.content"></div>
</div>
<div class="col-lg-12 col-sm-12 col-md-12 col-xs-12">
<div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-12" id="inputTemplate">
<div>
<label class="col-sm-4 col-xs-4">模板</label>
</div>
<div>
<textarea type="text" rows="10" name="inputTemplate" id="inputTemplateText" v-model="inputTemplate"
placeholder="請輸入模板"
></textarea>
</div>
</div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-12" id="inputContent">
<div>
<label class="col-sm-4 col-xs-4">輸入</label>
</div>
<div>
<textarea type="text" rows="10" name="inputTemplate" v-model="inputContent"
placeholder="請輸入數據" id="inputContentText"
class="form-control col-md-12 text-to-copy-1"></textarea>
</div>
</div>
</div>
</div>
<div class="col-lg-12 col-sm-12 col-md-12 col-xs-12 text-right" id="opButtons">
<button class="btn btn-primary" @click="clearInputTemplate()">清空模板</button>
<button class="btn btn-primary" @click="clearInputContent()">清空輸入</button>
<button class="btn btn-primary" @click="clearOutputContent()">清空輸出</button>
<button class="btn btn-success" @click="aiGen()">生成</button>
</div>
<div class="col-lg-12 col-sm-12 col-md-12 col-xs-12" id="outputContent">
<div>
<label class="col-sm-2 col-xs-2">輸出</label>
</div>
<div>
<textarea type="text" rows="20" name="outputContent" id="outputTextContent" v-model="outputContent"
placeholder=""
readonly></textarea>
</div>
</div>
</div>
</div>
</body>
</html>