> buffer=new Buffer('换汤不换药');
<Buffer e6 88 91 e7 88 b1 e4 bd a0 ef bc 8c e7 89 a9 e7 90 86>
> json=JSON.stringify(buffer);
'{"type":"Buffer","data":[230,136,145,231,136,177,228,189,160,239,188,140,231,13
7,169,231,144,134]}'
> JSON.parse(json);
{ type: 'Buffer',
data:
[ 230,
136,
145,
231,
136,
177,
228,
189,
160,
239,
188,
140,
231,
137,
169,
231,
144,
134 ] }
> copy=new Buffer(JSON.parse(json));
<Buffer e6 88 91 e7 88 b1 e4 bd a0 ef bc 8c e7 89 a9 e7 90 86>
> copy.toString();
'换汤不换药'
>
说明：
（1）JSON.stringify方法将数据对象转换成一个字符串
（2）JSON.parse方法将字符串转换成对象