// SHA-1编码,并转换成大写,即可获得签名
var shaSource = "XXXXXXXXcategory美食city上海formatjsonhas_coupon1has_deal1keyword泰国菜latitude31.21524limit20longitude121.420033offset_type0radius2000region长宁区sort7XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
var sign = new String(toSHA1(shaSource)).toUpperCase();
//签名示例
//7D78381BC58E1DB1DBA4BD965916FE6B4D5DC892