调用示例

全局定义

private static final String ENCODE_TYPE = "UTF-8";
private static final String ALGORITHM = "HmacSHA1";
private static final String HTTP_METHOD = "GET";
private static final String SEPARATOR = "&";
private static final String EQUAL = "=";

准备请求参数

Map parameterMap = new HashMap();
// 请求公共参数
parameterMap.put("Action", "SearchTemplate");
parameterMap.put("Version", "2014-06-18");
parameterMap.put("AccessKeyId", "testId"); //此处请替换成您自己的AccessKeyId
parameterMap.put("Timestamp", "2015-05-14T09:03:45Z");//此处将时间戳固定只是测试需要，这样此示例中生成的签名值就不会变，方便您对比验证，可变时间戳的生成需要用下边这句替换
//parameterMap.put("Timestamp", formatIso8601Date(new Date())); 
parameterMap.put("SignatureMethod", "HMAC-SHA1");
parameterMap.put("SignatureVersion", "1.0");
parameterMap.put("SignatureNonce", "4902260a-516a-4b6a-a455-45b653cf6150"); //此处将唯一随机数固定只是测试需要，这样此示例中生成的签名值就不会变，方便您对比验证，可变唯一随机数的生成需要用下边这句替换
//parameterMap.put("SignatureNonce", UUID.randomUUID().toString());
parameterMap.put("Format", "XML"); //另外支持JSON格式

使用请求参数构造规范化的请求字符串（Canonicalized Query String）

private static String percentEncode(String value) throws UnsupportedEncodingException {
return URLEncoder.encode(value, ENCODE_TYPE).replace("+", "%20").replace("*", "%2A").replace("%7E", "~");
}
private static String buildCanonicalizedQueryString(Map parameterMap) throws UnsupportedEncodingException {
// 对参数进行排序
List sortedKeys = new ArrayList(parameterMap.keySet());
Collections.sort(sortedKeys);
StringBuilder temp = new StringBuilder();
for (String key : sortedKeys) {
// 此处需要对key和value进行编码
String value = parameterMap.get(key);
temp.append(SEPARATOR).append(percentEncode(key)).append(EQUAL).append(percentEncode(value));
}
return temp.toString().substring(1);
}

计算签名（包括HMAC签名以及Base64编码）

private static String buildStringToSign(String canonicalizedQueryString) throws UnsupportedEncodingException {
// 生成stringToSign字符
StringBuilder temp = new StringBuilder();
temp.append(HTTP_METHOD).append(SEPARATOR);
temp.append(percentEncode("/")).append(SEPARATOR);
// 此处需要对canonicalizedQueryString进行编码
temp.append(percentEncode(canonicalizedQueryString));
return temp.toString();
}
private static String buildSignature(String keySecret, String stringToSign) throws UnsupportedEncodingException, InvalidKeyException, NoSuchAlgorithmException {
SecretKey key = new SecretKeySpec((keySecret + SEPARATOR).getBytes(ENCODE_TYPE), SignatureMethod.HMAC_SHA1);
Mac mac = Mac.getInstance(ALGORITHM);
mac.init(key);
byte[] hashBytes = mac.doFinal(stringToSign.toString().getBytes(ENCODE_TYPE));
byte[] base64Bytes = new Base64().encode(hashBytes);
String base64UTF8String = new String(base64Bytes, "utf-8");
return URLEncoder.encode(base64UTF8String, ENCODE_TYPE);
}

构造请求的URL

private static String buildRequestURL(String signature, Map parameterMap) throws UnsupportedEncodingException {
// 生成请求URL
StringBuilder temp = new StringBuilder("http://mts.aliyuncs.com/?");
temp.append(URLEncoder.encode("Signature", ENCODE_TYPE)).append("=").append(signature);
for (Map.Entry e : parameterMap.entrySet()) {
temp.append("&").append(percentEncode(e.getKey())).append("=").append(percentEncode(e.getValue()));
}
return temp.toString();
}