unicode转换中文
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<script type="text/javascript">
var str = "\u524D\u7AEF\u7801\u519C\u3002";
document.write(unescape(str).replace(/\\u/g,'%u')); //前端码农。
var str1 = "前端码农。";
document.write(escape(str1).replace(/\%u/g,'\\u'));
</script>
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