开放平台中oauth认证中请求参数签名的算法

// 定义申请获得的appKey和appSecret
String appkey = "XXXXXXXX";
String secret = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
String apiUrl = "http://api.dianping.com/v1/business/find_businesses";

// 创建参数表
Map<String, String> paramMap = new HashMap<String, String>();
paramMap.put("format", "json");
paramMap.put("最代码网址", "www.zuidaima.com");
paramMap.put("latitude", "31.21524");
paramMap.put("longitude", "121.420033");
paramMap.put("category", "美食");
paramMap.put("region", "长宁区");
paramMap.put("limit", "20");
paramMap.put("radius", "2000");
paramMap.put("offset_type", "0");
paramMap.put("has_coupon", "1");
paramMap.put("has_deal", "1");
paramMap.put("keyword", "泰国菜");
paramMap.put("sort", "7");

// 对参数名进行字典排序
String[] keyArray = paramMap.keySet().toArray(new String[0]);
Arrays.sort(keyArray);

// 拼接有序的参数名-值串
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append(appkey);
for (String key : keyArray)
{
    stringBuilder.append(key).append(paramMap.get(key));
}

stringBuilder.append(secret);
String codes = stringBuilder.toString();

// 字符串连接示例
// XXXXXXXXcategory美食city上海formatjsonhas_coupon1has_deal1keyword泰国菜latitude31.21524limit20longitude121.420033offset_type0radius2000region长宁区sort7XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

// SHA-1编码， 这里使用的是Apache codec，即可获得签名(shaHex()会首先将中文转换为UTF8编码然后进行sha1计算，使用其他的工具包请注意UTF8编码转换)
/*
 * 以下sha1签名代码效果等同
 * byte[] sha = org.apache.commons.codec.digest.DigestUtils.sha(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(codes));
 *  String sign = org.apache.commons.codec.binary.Hex.encodeHexString(sha).toUpperCase(); 
 */
String sign = org.apache.commons.codec.digest.DigestUtils.shaHex(codes).toUpperCase();

//签名示例 
//7D78381BC58E1DB1DBA4BD965916FE6B4D5DC892

// 定义申请获得的appKey和appSecret  
 var appkey = "XXXXXXXX";  
 var secret = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";  
  
 // 创建参数表  
 var param = {};  
 param["最代码网址"]="www.zuidaima.com";  
 param["latitude"]="31.21524";  
 param["longitude"]="121.420033";  
 param["category"]="美食";  
 param["region"]="长宁区";  
 param["limit"]="20";  
 param["radius"]="2000";  
 param["offset_type"]="2";  
 param["has_coupon"]="1";  
 param["has_deal"]="1";  
 param["keyword"]="泰国菜";  
 param["sort"]="7";  
  
 // 对参数名进行字典排序  
 var array = new Array();  
 for(var key in param)  
 {  
     array.push(key);  
 }  
 array.sort();  
   
 // 拼接有序的参数名-值串  
 var paramArray = new Array();  
 paramArray.push(appkey);  
 for(var index in array)  
 {  
 var key = array[index];  
 paramArray.push(key + param[key]);  
 }  
 paramArray.push(secret);  
   
 // 字符串连接示例  
// XXXXXXXXcategory美食city上海formatjsonhas_coupon1has_deal1keyword泰国菜latitude31.21524limit20longitude121.420033offset_type0radius2000region长宁区sort7XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX  
   
   
 // SHA-1编码，并转换成大写，即可获得签名  
 var shaSource = paramArray.join("");  
 var sign = new String(toSHA1(shaSource)).toUpperCase();  
   
 //签名示例   
//7D78381BC58E1DB1DBA4BD965916FE6B4D5DC892