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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);

}