将js变量变换为json格式字符串

将js变量转换为json格式字符串

function printVar(v){if(v==null) return 'null';var type = typeof(v);var rtn = '';switch(type){case 'boolean':if(v)rtn='true';elsertn='false';break;case 'object':var i = 0;if(typeof(v.length)=='undefined'){rtn = '{';for(var x in v){if(i==0)rtn+=x+':'+printVar(v[x]);elsertn+=','+x+':'+printVar(v[x]);i++;}rtn += '}';}else{rtn = '[';for(var i=0;i<v.length;i++){if(i==0)rtn+=printVar(v[i]);elsertn+=','+printVar(v[i]);}rtn += ']';}break;case 'string':rtn = '"'+v+'"';break;case 'number':default:rtn = v;}return rtn;}