阿里云文本检测接口(TextScan)调用示例：Java工具类实现及API Key获取

{"title":"阿里云文本检测接口(TextScan)调用示例：Java工具类实现及API Key获取", "description":"本文提供一个使用Java编写的工具类，用于调用阿里云文本检测接口(TextScan)进行文本内容审核。文章详细介绍了如何获取API Key，以及代码实现细节。", "keywords":"阿里云, 文本检测, TextScan, API Key, Java, 工具类, 文本审核", "content":"要调用阿里云的文本检测接口，首先需要在阿里云上创建一个AccessKey，然后根据AccessKey获取API Key。以下是一个使用Java编写的工具类，用于调用阿里云的文本检测接口：\n\njava\nimport java.io.*;\nimport java.net.HttpURLConnection;\nimport java.net.URL;\nimport java.nio.charset.StandardCharsets;\nimport java.security.MessageDigest;\nimport java.security.NoSuchAlgorithmException;\nimport java.text.SimpleDateFormat;\nimport java.util.*;\n\nimport javax.crypto.Mac;\nimport javax.crypto.spec.SecretKeySpec;\n\nimport org.apache.commons.codec.binary.Base64;\n\npublic class AliyunTextScanUtil {\n\n private static final String API_URL = \"https://green.aliyuncs.com/green/text/scan\";\n private static final String API_VERSION = \"2017-01-12\";\n private static final String ACCESS_KEY_ID = \"your-access-key-id\";\n private static final String ACCESS_KEY_SECRET = \"your-access-key-secret\";\n private static final String FORMAT_ISO8601 = \"yyyy-MM-dd'T'HH:mm:ss'Z'\";\n private static final String CHARSET_UTF8 = \"UTF-8\";\n private static final int CONNECT_TIMEOUT = 3000;\n private static final int READ_TIMEOUT = 5000;\n\n public static void main(String[] args) throws Exception {\n String text = \"需要检测的文本内容\";\n String result = scanText(text);\n System.out.println(result);\n }\n\n public static String scanText(String text) throws Exception {\n String timestamp = getISO8601Time();\n String signatureNonce = UUID.randomUUID().toString();\n\n Map<String, String> params = new HashMap<>();\n params.put(\"Format\", \"JSON\");\n params.put(\"Version\", API_VERSION);\n params.put(\"AccessKeyId\", ACCESS_KEY_ID);\n params.put(\"SignatureMethod\", \"HMAC-SHA1\");\n params.put(\"Timestamp\", timestamp);\n params.put(\"SignatureVersion\", \"1.0\");\n params.put(\"SignatureNonce\", signatureNonce);\n params.put(\"Action\", \"TextScan\");\n params.put(\"RegionId\", \"cn-shanghai\");\n params.put(\"Scene\", \"antispam\");\n params.put(\"Content\", text);\n\n String signature = generateSignature(params);\n params.put(\"Signature\", signature);\n\n String queryString = buildQueryString(params);\n\n URL url = new URL(API_URL);\n HttpURLConnection connection = (HttpURLConnection) url.openConnection();\n connection.setRequestMethod(\"POST\");\n connection.setConnectTimeout(CONNECT_TIMEOUT);\n connection.setReadTimeout(READ_TIMEOUT);\n connection.setDoOutput(true);\n\n PrintWriter out = new PrintWriter(connection.getOutputStream());\n out.print(queryString);\n out.flush();\n out.close();\n\n int responseCode = connection.getResponseCode();\n if (responseCode == HttpURLConnection.HTTP_OK) {\n InputStream inputStream = connection.getInputStream();\n BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));\n StringBuilder response = new StringBuilder();\n String line;\n while ((line = reader.readLine()) != null) {\n response.append(line);\n }\n reader.close();\n return response.toString();\n } else {\n throw new IOException(\"Response code: \" + responseCode);\n }\n }\n\n private static String generateSignature(Map<String, String> params) throws Exception {\n String[] sortedKeys = params.keySet().toArray(new String[]{});\n Arrays.sort(sortedKeys);\n\n StringBuilder canonicalizedQueryString = new StringBuilder();\n for (String key : sortedKeys) {\n canonicalizedQueryString.append(\"&\")\n .append(encode(key)).append(\"=\").append(encode(params.get(key)));\n }\n\n StringBuilder stringToSign = new StringBuilder();\n stringToSign.append(\"POST\").append(\"&\")\n .append(encode(\"/\")).append(\"&\")\n .append(encode(canonicalizedQueryString.toString().substring(1)));\n\n SecretKeySpec signingKey = new SecretKeySpec(ACCESS_KEY_SECRET.getBytes(StandardCharsets.UTF_8), \"HmacSHA1\");\n Mac mac = Mac.getInstance(\"HmacSHA1\");\n mac.init(signingKey);\n\n byte[] signData = mac.doFinal(stringToSign.toString().getBytes(StandardCharsets.UTF_8));\n String signature = Base64.encodeBase64String(signData);\n\n return signature;\n }\n\n private static String buildQueryString(Map<String, String> params) throws UnsupportedEncodingException {\n StringBuilder queryString = new StringBuilder();\n for (Map.Entry<String, String> entry : params.entrySet()) {\n queryString.append(\"&\")\n .append(encode(entry.getKey())).append(\"=\").append(encode(entry.getValue()));\n }\n return queryString.substring(1);\n }\n\n private static String encode(String value) throws UnsupportedEncodingException {\n return value != null ? java.net.URLEncoder.encode(value, CHARSET_UTF8) : null;\n }\n\n private static String getISO8601Time() {\n SimpleDateFormat dateFormat = new SimpleDateFormat(FORMAT_ISO8601);\n dateFormat.setTimeZone(TimeZone.getTimeZone(\"UTC\"));\n return dateFormat.format(new Date());\n }\n}\n\n\n上述代码中，需要将ACCESS_KEY_ID和ACCESS_KEY_SECRET替换为你自己的Access Key ID和Access Key Secret。\n\n在scanText方法中，传入需要检测的文本内容，调用阿里云的TextScan接口进行文本内容审核。返回的结果是一个JSON字符串，可以根据需要解析处理。\n\n请注意，以上代码仅提供了基本的调用示例，实际使用时可能需要根据具体情况进行修改。