public String calculateAKSN(String ak, String sk, String url, List<NameValuePair> nameValuePairs, String method) {
    """
	sn = MD5(urlencode(basicString + sk))
	<p>
	其中 basicString 的算法如下：
	<p>
	(1) get 请求
	<p>
	url 中 http://域名{uri}
	<p>
	basicString = uri
	<p>
	(2) post 请求
	<p>
	url 中 http://域名{uri} POST 参数按照key进行从小大到字母排序
	<p>
	然后拼装成：k1=v1&amp;k2=v2&amp;k3=v3&amp;...&amp;kn=vn的格式=&gt; {params}
	<p>
	basicString = uri +?+ params
	
	@param ak             access key
	@param sk             secret key
	@param url            url值，例如: /geosearch/nearby 不能带hostname和querstring，也不能带？
	@param nameValuePairs $querystring_arrays 参数数组，key=&gt;value形式。在计算签名后不能重新排序，也不能添加或者删除数据元素
	@param method         method 只能为'POST'或者'GET'
	@return 计算SN签名算法
    """
        String params = "";
        if (method.equals("POST")) {
            Collections.sort(nameValuePairs, new Comparator<NameValuePair>() {
                @Override
                public int compare(NameValuePair o1, NameValuePair o2) {
                    StringComparator comparator = new StringComparator();
                    return comparator.compare(o1.getName(), o2.getName());
                }
            });

            StringBuilder stringBuilder = new StringBuilder();
            for (Iterator<NameValuePair> iterator = nameValuePairs.iterator(); iterator.hasNext(); ) {
                NameValuePair nameValuePair = iterator.next();
                String name = nameValuePair.getName();
                String value = nameValuePair.getValue();
                stringBuilder.append(name);
                stringBuilder.append("=");
                stringBuilder.append(value);
                if (iterator.hasNext()) {
                    stringBuilder.append("&");
                }
            }
            params = stringBuilder.toString();
        }

        String basicString = url + "? " + params;
        String sn = null;
        try {
            sn = MD5Helper.encrypt(URLEncoder.encode(basicString + sk, "UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return sn;
    }
public String calculateAKSN(String ak, String sk, String url, List<NameValuePair> nameValuePairs, String method) {
        String params = "";
        if (method.equals("POST")) {
            Collections.sort(nameValuePairs, new Comparator<NameValuePair>() {
                @Override
                public int compare(NameValuePair o1, NameValuePair o2) {
                    StringComparator comparator = new StringComparator();
                    return comparator.compare(o1.getName(), o2.getName());
                }
            });

            StringBuilder stringBuilder = new StringBuilder();
            for (Iterator<NameValuePair> iterator = nameValuePairs.iterator(); iterator.hasNext(); ) {
                NameValuePair nameValuePair = iterator.next();
                String name = nameValuePair.getName();
                String value = nameValuePair.getValue();
                stringBuilder.append(name);
                stringBuilder.append("=");
                stringBuilder.append(value);
                if (iterator.hasNext()) {
                    stringBuilder.append("&");
                }
            }
            params = stringBuilder.toString();
        }

        String basicString = url + "? " + params;
        String sn = null;
        try {
            sn = MD5Helper.encrypt(URLEncoder.encode(basicString + sk, "UTF-8"));
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return sn;
    }
public String calculateAKSN ( String ak , String sk , String url , List < NameValuePair > nameValuePairs , String method ) { String params = "" ; if ( method . equals ( "POST" ) ) { Collections . sort ( nameValuePairs , new Comparator < NameValuePair > ( ) { @ Override public int compare ( NameValuePair o1 , NameValuePair o2 ) { StringComparator comparator = new StringComparator ( ) ; return comparator . compare ( o1 . getName ( ) , o2 . getName ( ) ) ; } } ) ; StringBuilder stringBuilder = new StringBuilder ( ) ; for ( Iterator < NameValuePair > iterator = nameValuePairs . iterator ( ) ; iterator . hasNext ( ) ; ) { NameValuePair nameValuePair = iterator . next ( ) ; String name = nameValuePair . getName ( ) ; String value = nameValuePair . getValue ( ) ; stringBuilder . append ( name ) ; stringBuilder . append ( "=" ) ; stringBuilder . append ( value ) ; if ( iterator . hasNext ( ) ) { stringBuilder . append ( "&" ) ; } } params = stringBuilder . toString ( ) ; } String basicString = url + "? " + params ; String sn = null ; try { sn = MD5Helper . encrypt ( URLEncoder . encode ( basicString + sk , "UTF-8" ) ) ; } catch ( UnsupportedEncodingException e ) { e . printStackTrace ( ) ; } return sn ; }
sn = MD5(urlencode(basicString + sk))
<p>
其中 basicString 的算法如下：
<p>
(1) get 请求
<p>
url 中 http://域名{uri}
<p>
basicString = uri
<p>
(2) post 请求
<p>
url 中 http://域名{uri} POST 参数按照key进行从小大到字母排序
<p>
然后拼装成：k1=v1&amp;k2=v2&amp;k3=v3&amp;...&amp;kn=vn的格式=&gt; {params}
<p>
basicString = uri +?+ params

@param ak             access key
@param sk             secret key
@param url            url值，例如: /geosearch/nearby 不能带hostname和querstring，也不能带？
@param nameValuePairs $querystring_arrays 参数数组，key=&gt;value形式。在计算签名后不能重新排序，也不能添加或者删除数据元素
@param method         method 只能为'POST'或者'GET'
@return 计算SN签名算法
sn = MD5 ( urlencode ( basicString + sk )) <p > 其中 basicString 的算法如下： <p > ( 1 ) get 请求 <p > url 中 http : // 域名 { uri } <p > basicString = uri <p > ( 2 ) post 请求 <p > url 中 http : // 域名 { uri } POST 参数按照key进行从小大到字母排序 <p > 然后拼装成：k1 = v1&amp ; k2 = v2&amp ; k3 = v3&amp ; ... &amp ; kn = vn的格式 = &gt ; { params } <p > basicString = uri + ? + params