Java 百度翻译 API 中文转英文接入 |
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Java 百度翻译 API 中文转英文接入
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Java 百度翻译 API 中文转英文接入
业务上遇到了语言国际化的需求，需要将 中文的 json 字符串翻译成英文，通过百度翻译 API 接口来实现翻译功能。 1、平台认证登录百度翻译开放平台，找到通用翻译模块，提交申请。 申请链接：http://api.fanyi.baidu.com/product/11 申请通过后，就能直接使用了，默认为标准版，完全免费：
翻译开放平台非常友好，提供了许多常用语言的 demo 下载，稍微修改下便能使用了。 页面下载链接： http://api.fanyi.baidu.com/doc/21
demo 配置好 appid 及密钥，运行便能看到控制台中文成功翻译成了英文：
我的目标是将 一长串的中文 json 翻译成英文 json, 上面的 demo 是满足不了需求的，可以创建一个 springboot 项目，将 demo 代码迁移到项目中，封装一个接口实现业务需求。 项目结构如下：
先引入 fastJson 依赖： com.alibaba fastjson 1.2.70接口参数接收一长串的中文 json ，翻译完成后返回英文 json: 3.1.1、直接创建线程版本 package com.lin.translate.controller; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONArray; import com.lin.translate.config.TransApi; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import java.util.List; import java.util.Map; @Controller @RequestMapping("/com/lin") public class TranslateController { // 在平台申请的APP_ID 详见 http://api.fanyi.baidu.com/api/trans/product/desktop?req=developer private static final String APP_ID = ""; private static final String SECURITY_KEY = ""; @GetMapping("/translate") @ResponseBody public Map toTranslate(@RequestBody Map map) throws InterruptedException { TransApi api = new TransApi(APP_ID, SECURITY_KEY); for(String key : map.keySet()) { Map childMap = map.get(key); StringBuilder builder = new StringBuilder(); for (String childKey : childMap.keySet()) { //需要翻译的中文 builder.append(childMap.get(childKey)).append("\n"); } //创建线程 Thread thread = new Thread() { @Override public void run() { String result = api.getTransResult(builder.toString(), "auto", "en"); System.out.println(result); //转成map Map mapResult = JSON.parseObject(result, Map.class); List transResult = (List)JSONArray.parse(JSON.toJSONString(mapResult.get("trans_result"))); int i = 0; for (String childKey : childMap.keySet()) { //获取翻译结果 String transQuery = transResult.get(i).get("dst"); try { //解码 transQuery= URLDecoder.decode(transQuery,"utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } childMap.put(childKey, transQuery); i++; } try { //睡眠一秒 Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } }; thread.start(); //主线程阻塞，等待子线程结束 thread.join(); } return map; } } 3.1.2、线程池版本 package com.lin.translate.controller; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONArray; import com.lin.translate.config.TransApi; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import java.util.List; import java.util.Map; import java.util.concurrent.*; @Controller @RequestMapping("/com/lin") public class ExecutorController { // 在平台申请的APP_ID 详见 http://api.fanyi.baidu.com/api/trans/product/desktop?req=developer private static final String APP_ID = ""; private static final String SECURITY_KEY = ""; @GetMapping("/executorTranslate") @ResponseBody public Map toTranslate(@RequestBody Map map) throws InterruptedException { TransApi api = new TransApi(APP_ID, SECURITY_KEY); //创建线程池，核心线程1，最大线程数10，存货时间1分钟，任务队列5，默认的线程工厂，拒绝策略为拒绝并抛出异常 ExecutorService executorService = new ThreadPoolExecutor(1, 10, 1, TimeUnit.MINUTES, new ArrayBlockingQueue(5, true), Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy()); for (String key : map.keySet()) { Map childMap = map.get(key); StringBuilder builder = new StringBuilder(); for (String childKey : childMap.keySet()) { //需要翻译的中文 builder.append(childMap.get(childKey)).append("\n"); } //执行线程 executorService.execute(() -> { String result = api.getTransResult(builder.toString(), "auto", "en"); System.out.println("result:" + result); //转成map Map mapResult = JSON.parseObject(result, Map.class); List transResult = (List) JSONArray.parse(JSON.toJSONString(mapResult.get("trans_result"))); int i = 0; for (String childKey : childMap.keySet()) { //获取翻译结果 String transQuery = transResult.get(i).get("dst"); try { //解码 transQuery = URLDecoder.decode(transQuery, "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } childMap.put(childKey, transQuery); i++; } }); //线程池等待时间，这里即阻塞2秒 executorService.awaitTermination(2, TimeUnit.SECONDS); } //任务执行完成后关闭线程池 executorService.shutdown(); return map; } } 3.2、demo 配置类代码HttpGet 类代码如下： package com.baidu.translate.demo; import java.io.BufferedReader; import java.io.Closeable; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLEncoder; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.Map; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; class HttpGet { protected static final int SOCKET_TIMEOUT = 10000; // 10S protected static final String GET = "GET"; public static String get(String host, Map params) { try { // 设置SSLContext SSLContext sslcontext = SSLContext.getInstance("TLS"); sslcontext.init(null, new TrustManager[] { myX509TrustManager }, null); String sendUrl = getUrlWithQueryString(host, params); // System.out.println("URL:" + sendUrl); URL uri = new URL(sendUrl); // 创建URL对象 HttpURLConnection conn = (HttpURLConnection) uri.openConnection(); if (conn instanceof HttpsURLConnection) { ((HttpsURLConnection) conn).setSSLSocketFactory(sslcontext.getSocketFactory()); } conn.setConnectTimeout(SOCKET_TIMEOUT); // 设置相应超时 conn.setRequestMethod(GET); int statusCode = conn.getResponseCode(); if (statusCode != HttpURLConnection.HTTP_OK) { System.out.println("Http错误码：" + statusCode); } // 读取服务器的数据 InputStream is = conn.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(is)); StringBuilder builder = new StringBuilder(); String line = null; while ((line = br.readLine()) != null) { builder.append(line); } String text = builder.toString(); close(br); // 关闭数据流 close(is); // 关闭数据流 conn.disconnect(); // 断开连接 return text; } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (KeyManagementException e) { e.printStackTrace(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } public static String getUrlWithQueryString(String url, Map params) { if (params == null) { return url; } StringBuilder builder = new StringBuilder(url); if (url.contains("?")) { builder.append("&"); } else { builder.append("?"); } int i = 0; for (String key : params.keySet()) { String value = params.get(key); if (value == null) { // 过滤空的key continue; } if (i != 0) { builder.append('&'); } builder.append(key); builder.append('='); builder.append(encode(value)); i++; } return builder.toString(); } protected static void close(Closeable closeable) { if (closeable != null) { try { closeable.close(); } catch (IOException e) { e.printStackTrace(); } } } /** * 对输入的字符串进行URL编码, 即转换为%20这种形式 * * @param input 原文 * @return URL编码. 如果编码失败, 则返回原文 */ public static String encode(String input) { if (input == null) { return ""; } try { return URLEncoder.encode(input, "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return input; } private static TrustManager myX509TrustManager = new X509TrustManager() { @Override public X509Certificate[] getAcceptedIssuers() { return null; } @Override public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { } @Override public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { } }; }MD5 类代码如下： package com.lin.translate.config; import java.io.*; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; /** * MD5编码相关的类 * * @author wangjingtao * */ public class MD5 { // 首先初始化一个字符数组，用来存放每个16进制字符 private static final char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; /** * 获得一个字符串的MD5值 * * @param input 输入的字符串 * @return 输入字符串的MD5值 * */ public static String md5(String input) { if (input == null) { return null; } try { // 拿到一个MD5转换器（如果想要SHA1参数换成”SHA1”） MessageDigest messageDigest = MessageDigest.getInstance("MD5"); // 输入的字符串转换成字节数组 byte[] inputByteArray = input.getBytes("utf-8"); // inputByteArray是输入字符串转换得到的字节数组 messageDigest.update(inputByteArray); // 转换并返回结果，也是字节数组，包含16个元素 byte[] resultByteArray = messageDigest.digest(); // 字符数组转换成字符串返回 return byteArrayToHex(resultByteArray); } catch (NoSuchAlgorithmException | UnsupportedEncodingException e) { e.printStackTrace(); return null; } } /** * 获取文件的MD5值 * * @param file * @return */ public static String md5(File file) { try { if (!file.isFile()) { System.err.println("文件" + file.getAbsolutePath() + "不存在或者不是文件"); return null; } FileInputStream in = new FileInputStream(file); String result = md5(in); in.close(); return result; } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } public static String md5(InputStream in) { try { MessageDigest messagedigest = MessageDigest.getInstance("MD5"); byte[] buffer = new byte[1024]; int read = 0; while ((read = in.read(buffer)) != -1) { messagedigest.update(buffer, 0, read); } in.close(); String result = byteArrayToHex(messagedigest.digest()); return result; } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } private static String byteArrayToHex(byte[] byteArray) { // new一个字符数组，这个就是用来组成结果字符串的（解释一下：一个byte是八位二进制，也就是2位十六进制字符（2的8次方等于16的2次方）） char[] resultCharArray = new char[byteArray.length * 2]; // 遍历字节数组，通过位运算（位运算效率高），转换成字符放到字符数组中去 int index = 0; for (byte b : byteArray) { resultCharArray[index++] = hexDigits[b >>> 4 & 0xf]; resultCharArray[index++] = hexDigits[b & 0xf]; } // 字符数组组合成字符串返回 return new String(resultCharArray); } }TransApi 类代码如下： package com.lin.translate.config; import java.util.HashMap; import java.util.Map; public class TransApi { private static final String TRANS_API_HOST = "http://api.fanyi.baidu.com/api/trans/vip/translate"; private String appid; private String securityKey; public TransApi(String appid, String securityKey) { this.appid = appid; this.securityKey = securityKey; } public String getTransResult(String query, String from, String to) { Map params = buildParams(query, from, to); return HttpGet.get(TRANS_API_HOST, params); } private Map buildParams(String query, String from, String to) { Map params = new HashMap(); params.put("q", query); params.put("from", from); params.put("to", to); params.put("appid", appid); // 随机数 String salt = String.valueOf(System.currentTimeMillis()); params.put("salt", salt); // 签名 String src = appid + query + salt + securityKey; // 加密前的原文 params.put("sign", MD5.md5(src)); return params; } } 3.3、结果示例原中文 json： { "login": { "login": "登录", "loginLoading": "登录中...", "account": "账号", "password": "密码", "lang": "语言", "setAddress": "设置服务地址", "more": "更多" }, "mDns": { "local": "局域网", "localText": "内的XYMERP服务", "useAddress": "当前设置的地址", "addressUnAvailable": "无法连接此服务器", "setAddressTips": "未设置服务地址，立刻设置" } }翻译后的英文 json： { "login": { "login": "Sign in", "loginLoading": "Logging in", "account": "account number", "password": "password", "lang": "language", "setAddress": "Set service address", "more": "more" }, "mDns": { "local": "LAN", "localText": "Xymerp service in", "useAddress": "Currently set address", "addressUnAvailable": "Unable to connect to this server", "setAddressTips": "Service address not set, set now" } }以上结果满足我的需求了，不满足你们需求的就稍微修改下吧。 |
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