具体逻辑
- 3段代码加1个随机数，3段代码不限制长度
- 若3段代码中包含英文字母，则最后的随机数以大写字母结尾
- 若3段代码是纯数字，则最后的随机数以数字结尾
实现
由于想到啥写啥，所以逻辑其实很垃圾且为了方便全部集成在一个HTML文件下了。
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| <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>生成码</title>
</head>
<script type="text/javascript">
document.onkeydown=keyListener;
function keyListener(e){
if(e.keyCode == 13){
generate();
}
}
function copyToClipboard(elem) {
var targetId = "_hiddenCopyText_";
var isInput = elem.tagName === "INPUT" || elem.tagName === "TEXTAREA";
var origSelectionStart, origSelectionEnd;
if (isInput) {
target = elem;
origSelectionStart = elem.selectionStart;
origSelectionEnd = elem.selectionEnd;
} else {
target = document.getElementById(targetId);
if (!target) {
var target = document.createElement("textarea");
target.style.position = "absolute";
target.style.left = "-9999px";
target.style.top = "0";
target.id = targetId;
document.body.appendChild(target);
}
target.textContent = elem.textContent;
}
var currentFocus = document.activeElement;
target.focus();
target.setSelectionRange(0, target.value.length);
var succeed;
try {
succeed = document.execCommand("copy");
} catch (e) {
succeed = false;
}
if (currentFocus && typeof currentFocus.focus === "function") {
currentFocus.focus();
}
if (isInput) {
elem.setSelectionRange(origSelectionStart, origSelectionEnd);
} else {
target.textContent = "";
}
return succeed;
}
function copy() {
copyToClipboard(document.getElementById("showText"));
alert("复制成功！");
}
function generate() {
document.getElementById("showText").value = "";
var s1 = document.getElementById("text1").value;
var s2 = document.getElementById("text2").value;
var s3 = document.getElementById("text3").value;
var textbox = document.getElementById("showText");
var limitDigit = new RegExp("^\\+?[1-9][0-9]*$");
if (limitDigit.test(s1) && limitDigit.test(s2) && limitDigit.test(s3)) {
s3 = parseInt(document.getElementById("text3").value);
for (var i = 0; i < parseInt(document.getElementById("text4").value); i++) {
var s4 = randomDigit(s1, s2, s3);
textbox.value = textbox.value + (s1 + s2 + s3 + s4 + '\n');
s3++;
}
} else {
var chars = "0123456789ABCDEFGHIZKLMNOPQRSTUVWXYZ";
for (var i = 0; i < parseInt(document.getElementById("text4").value); i++) {
var s4 = chars.charAt(parseInt(Math.random() * 36));
textbox.value = textbox.value + (s1.toUpperCase() + s2.toUpperCase() + s3.toUpperCase() + s4 + '\n');
var s3_10 = parseInt(s3, 36);
s3 = (++s3_10).toString(36);
}
}
}
function reset(){
document.getElementById("text1").value = "";
document.getElementById("text2").value = "";
document.getElementById("text3").value = "";
document.getElementById("text4").value = "";
document.getElementById("showText").value = "";
}
function randomDigit(s_1, s_2, s3) {
var pair = new Array();
var single = new Array();
var randomDigit = 0;
var n1 = s_1.length;
var n2 = s_2.length;
var n3 = (s3 + "").length;
var sumSingle = 0;
var sumPair = 0;
var sum = 0;
var s1 = parseInt(s_1);
var s2 = parseInt(s_2);
for (var j = 1; j <= n3; j++) {
if (j % 2 != 0) {
single.push(s3 % 10);
s3 = parseInt(s3 / 10);
} else {
pair.push(s3 % 10);
s3 = parseInt(s3 / 10);
}
}
if (n3 % 2 != 0 && n2 % 2 != 0) {
for (var j = 1; j <= n2; j++) {
if (j % 2 != 0) {
pair.push(s2 % 10);
s2 = parseInt(s2 / 10);
} else {
single.push(s2 % 10);
s2 = parseInt(s2 / 10);
}
}
for (var j = 1; j <= n1; j++) {
if (j % 2 != 0) {
single.push(s1 % 10);
s1 = parseInt(s1 / 10);
} else {
pair.push(s1 % 10);
s1 = parseInt(s1 / 10);
}
}
} else if (n3 % 2 != 0 && n2 % 2 == 0) {
for (var j = 1; j <= n2; j++) {
if (j % 2 != 0) {
pair.push(s2 % 10);
s2 = parseInt(s2 / 10);
} else {
single.push(s2 % 10);
s2 = parseInt(s2 / 10);
}
}
for (var j = 1; j <= n1; j++) {
if (j % 2 != 0) {
pair.push(s1 % 10);
s1 = parseInt(s1 / 10);
} else {
single.push(s1 % 10);
s1 = parseInt(s1 / 10);
}
}
} else if (n3 % 2 == 0 && n2 % 2 != 0) {
for (var j = 1; j <= n2; j++) {
if (j % 2 != 0) {
single.push(s2 % 10);
s2 = parseInt(s2 / 10);
} else {
pair.push(s2 % 10);
s2 = parseInt(s2 / 10);
}
}
for (var j = 1; j <= n1; j++) {
if (j % 2 != 0) {
pair.push(s1 % 10);
s1 = parseInt(s1 / 10);
} else {
single.push(s1 % 10);
s1 = parseInt(s1 / 10);
}
}
} else {
for (var j = 1; j <= n2; j++) {
if (j % 2 != 0) {
single.push(s2 % 10);
s2 = parseInt(s2 / 10);
} else {
pair.push(s2 % 10);
s2 = parseInt(s2 / 10);
}
}
for (var j = 1; j <= n1; j++) {
if (j % 2 != 0) {
single.push(s1 % 10);
s1 = parseInt(s1 / 10);
} else {
pair.push(s1 % 10);
s1 = parseInt(s1 / 10);
}
}
}
for (var j = 0; j < single.length; j++) {
sumSingle += single[j];
}
for (var j = 0; j < pair.length; j++) {
sumPair += pair[j];
}
sum = sumSingle * 3 + sumPair;
if (sum % 10 == 0) {
randomDigit = 0;
} else {
randomDigit = 10 - (sum % 10);
}
return randomDigit;
}
</script>
<body>
<fieldset>
<legend align="center"><h2>生成码</h2></legend>
<table border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td> <label for="text1">国家代码：</label></td>
<td>
<input type="text" name="text1" id="text1" onkeyup="value=value.replace(/[\W]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" />
</td>
<td> <label for="text2">厂商代码：</label></td>
<td>
<input type="text" name="text2" id="text2" onkeyup="value=value.replace(/[\W]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" />
</td>
<td> <label for="text3">商品代码：</label></td>
<td>
<input type="text" name="text3" id="text3" onkeyup="value=value.replace(/[\W]/g,'')"
onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))" />
</td>
<td> <label for="text4">生成数量：</label></td>
<td>
<input name="text4" id="text4" type="text" onkeyup="value=this.value.replace(/\D+/g,'')" />
</td>
</tr>
</table>
<div align="center">
<br>
<textarea rows="23" cols="102" id="showText" style="font-size: 18px; font-weight: bold;"></textarea>
<br><br>
<button type="button" id="generate" onclick="generate();">生成</button>
<button type="button" onclick="reset();">重置</button>
<button type="button" onclick="copy();">复制全部</button>
</div>
</fieldset>
</body>
</html>
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