JS字符串与二进制的相互转化

//字符串转ascii码，用charCodeAt();
//ascii码转字符串，用fromCharCode();
var str = "A";
var code = str.charCodeAt();
var str2 = String.fromCharCode(code);

　　十进制转二进制

var a = "i";
console.log(a.charCodeAt()); //105
console.log(a.charCodeAt().toString(2)); //1101001

　　

var a = "我";
console.log(a.charCodeAt()); //25105
console.log(a.charCodeAt().toString(2)); //110001000010001

　　

var a = "我们";
console.log(a.length); //2
var list = a.split("");
console.log(list.length); //2
console.log(a.charCodeAt().toString(2)); //110001000010001 100111011101100

　　

//将字符串转换成二进制形式，中间用空格隔开
function strToBinary(str){var result = [];var list = str.split("");for(var i=0;i<list.length;i++){if(i != 0){result.push(" ");}var item = list[i];var binaryStr = item.charCodeAt().toString(2);result.push(binartStr);}    return result.join("");
}console.log(strToBinary("我们")); //110001000010001 100111011101100
console.log(strToBinary("@%$+")); //1000000 100101 100100 101011//将二进制字符串转换成Unicode字符串
function binaryToStr(str){var result = [];var list = str.split(" ");for(var i=0;i<list.length;i++){var item = list[i];var asciiCode = parseInt(item,2);var charValue = String.fromCharCode(asciiCode);result.push(charValue);}return result.join("");
} console.log(binaryToStr("110001000010001 100111011101100")); //我们
console.log(binaryToStr("1000000 100101 100100 101011")); //@%$+  

　　转载请注明出处：http://www.cnblogs.com/it-deepinmind/