各种文字编码解码方式大合集

统一的函数以下几种编码解码方式需要使用
function left_zero_4(str) {
            if (str != null && str != '' && str != 'undefined') {
                if (str.length == 2) {
                    return '00' + str;
                }
            }
            return str;
        }
中文汉字转Unicode
function unicode(str){
            var value='';
            for (var i = 0; i < str.length; i++) {
                value += '\u' + left_zero_4(parseInt(str.charCodeAt(i)).toString(16));
            }
            return value;
        }
        function left_zero_4(str) {
            if (str != null && str != '' && str != 'undefined') {
                if (str.length == 2) {
                    return '00' + str;
                }
            }
            return str;
        }
Unicode转中文汉字、ASCII转换Unicode
function reconvert(str){ 
            str = str.replace(/(\u)(w{1,4})/gi,function($0){ 
                return (String.fromCharCode(parseInt((escape($0).replace(/(%5Cu)(w{1,4})/g,"$2")),16))); 
            }); 
            str = str.replace(/(&#x)(w{1,4});/gi,function($0){ 
                return String.fromCharCode(parseInt(escape($0).replace(/(%26%23x)(w{1,4})(%3B)/g,"$2"),16)); 
            }); 
            str = str.replace(/(&#)(d{1,6});/gi,function($0){ 
                return String.fromCharCode(parseInt(escape($0).replace(/(%26%23)(d{1,6})(%3B)/g,"$2"))); 
            }); 
             
            return str; 
        }
Unicode转换ASCII
function unicode1(str){ 
    var value='';
    for (var i = 0; i < str.length; i++)
        value += '&#' + str.charCodeAt(i) + ';';
    return value;
}
中文转换&#XXXX
function ascii(str){ 
    var value='';
    for (var i = 0; i < str.length; i++) {
        value += '&#x' + left_zero_4(parseInt(str.charCodeAt(i)).toString(16))+';';
    }
    return value;
}
 
在线网站http://bluesky1024.gitee.io/unicode