js中字符串转base64和base64转字符串

var str = ‘坂井泉水‘; ?//console.log(encodeURI(str)); ?//console.log(btoa(encodeURI(str))); ?//console.log(atob(btoa(encodeURI(str)))); ?//console.log(decodeURI(atob(btoa(encodeURI(str))))); ?//字符串转base64 ?function encode(str){ ???// 对字符串进行编码 ???var encode = encodeURI(str); ???// 对编码的字符串转化base64 ???var base64 = btoa(encode); ???return base64; ?} ?// base64转字符串 ?function decode(base64){ ?????// 对base64转编码 ?????var decode = atob(base64); ?????// 编码转字符串 ?????var str = decodeURI(decode); ?????return str; ?} ?console.log(encode(str)); ?console.log(decode(encode(str)));