javascript将二进制转换成ASCII码对应的字符
分类：实例代码
本章节分享一段代码实例，它实现了将二进制转换为ASCII码对应的字符。
代码实例如下:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.pipipi.net/" />
<title>前端教程网</title>
<script type="text/javascript">
var input_id = "bin_text";
var answer_id = "answer";
function convertToASCII() {
var bin_text = document.getElementById(input_id);
var answer = document.getElementById(answer_id);
if (!answer) {
alert(answer_id);
return;
}
if (bin_text){
var text = bin_text.value;
}
else {
error(input_id);
return;
}
var divisible = text.length % 8;
var nonBinary = /[^0|1]/.test(text);
if (text.length > 0 && divisible == 0 && !nonBinary) {
var regex = /[0|1]{8}/g;
var str = text.match(regex);
var code = 0;
var placeVal, exp, digit;
var ascii = '';
while (str.length > 0) {
code = 0;
for (var i=0; i<str[0].length; i++) {
placeVal = 7-i;
exp = Math.pow(2, i);
digit = str[0].charAt(placeVal);
code += exp*digit;
}
str.shift();
ascii += String.fromCharCode(code);
}
answer.innerHTML = ascii;
}
else {
error("Malformed binary.");
return;
}
function error(errText) {
answer.innerHTML = errText ;
}
}
window.onload=function(){
var obt=document.getElementById("bt");
obt.onclick=function(){convertToASCII()}
}
</script>
</head>
<body>
<div>
<input type="text" value="01101000" id="bin_text"/>
<input type="button" id="bt" value="查看效果"/>
</div>
<p id="answer"></p>
</body>
</html>