调用谷歌翻译API（FREE）的java代码

因为工作产品需要，需要APP 开发翻译功能。

由于谷歌翻译API进行收费，

搜索了一下，网上有2中方式实现。

1.破解生成token规律。

2.用httpclient访问web，然后解析

两种方式都比较麻烦。

经过google发现还有更简单的方式：

"https://translate.googleapis.com/translate_a/single?client=gtx&sl={fromCulture}&tl={toCulture}&dt=t&q={text}"

client ,dt 两个参数不要修改，不然无法正常工作

sl 为要翻译的文本语言，如果不知道，可以为auto

tl 为目标语言。必须指定

q 为要翻译的文本。注意中文的 UrlEncoded 问题

写成工具类可以如下：


import com.alibaba.fastjson.JSONArray;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.*;public class GoogleTranslateTest {public static void main(String args[]) throws Exception {System.out.println("-----test-----");String txt="永和九年，岁在癸丑，暮春之初，会于会稽山阴之兰亭，修禊事也。群贤毕至，少长咸集。此地有崇山峻岭，茂林修竹；又有清流激湍，映带左右，引以为流觞曲水，列坐其次。虽无丝竹管弦之盛，一觞一咏，亦足以畅叙幽情。是日也，天朗气清，惠风和畅，仰观宇宙之大，俯察品类之盛，所以游目骋怀，足以极视听之娱，信可乐也。\n" +"夫人之相与，俯仰一世，或取诸怀抱，悟言一室之内；或因寄所托，放浪形骸之外。虽趣舍万殊，静躁不同，当其欣于所遇，暂得于己，快然自足，不知老之将至。及其所之既倦，情随事迁，感慨系之矣。向之所欣，俯仰之间，已为陈迹，犹不能不以之兴怀。况修短随化，终期于尽。古人云：“死生亦大矣。”岂不痛哉！(不知老之将至 一作：曾不知老之将至)\n" +"每览昔人兴感之由，若合一契，未尝不临文嗟悼，不能喻之于怀。固知一死生为虚诞，齐彭殇为妄作。后之视今，亦犹今之视昔。悲夫！故列叙时人，录其所述，虽世殊事异，所以兴怀，其致一也。后之览者，亦将有感于斯文。";GT g = GT.getInstance();System.out.println( g.translateText(txt,"auto","en"));System.out.println( g.translateText("谁能说支持不支持","auto","en"));}
}/*** 谷歌翻译类*/
class GT {private static final String PATH="https://translate.googleapis.com/translate_a/single"; //地址private static final String CLIENT="gtx";private static final String USER_AGENT="Mozilla/5.0";//"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36";private static final Map<String,String> LANGUAGE_MAP=new HashMap();private static GT _instance = null;/*** 获取单例* @return*/public static GT getInstance() {if( null == _instance){_instance = new GT();_instance.init();}return _instance;}/*** 初始化语言类*/private void init(){LANGUAGE_MAP.put("auto","Automatic");LANGUAGE_MAP.put("af","Afrikaans");LANGUAGE_MAP.put("sq","Albanian");LANGUAGE_MAP.put("am","Amharic");LANGUAGE_MAP.put("ar","Arabic");LANGUAGE_MAP.put("hy","Armenian");LANGUAGE_MAP.put("az","Azerbaijani");LANGUAGE_MAP.put("eu","Basque");LANGUAGE_MAP.put("be","Belarusian");LANGUAGE_MAP.put("bn","Bengali");LANGUAGE_MAP.put("bs","Bosnian");LANGUAGE_MAP.put("bg","Bulgarian");LANGUAGE_MAP.put("ca","Catalan");LANGUAGE_MAP.put("ceb","Cebuano");LANGUAGE_MAP.put("ny","Chichewa");LANGUAGE_MAP.put("zh_cn","Chinese Simplified");LANGUAGE_MAP.put("zh_tw","Chinese Traditional");LANGUAGE_MAP.put("co","Corsican");LANGUAGE_MAP.put("hr","Croatian");LANGUAGE_MAP.put("cs","Czech");LANGUAGE_MAP.put("da","Danish");LANGUAGE_MAP.put("nl","Dutch");LANGUAGE_MAP.put("en","English");LANGUAGE_MAP.put("eo","Esperanto");LANGUAGE_MAP.put("et","Estonian");LANGUAGE_MAP.put("tl","Filipino");LANGUAGE_MAP.put("fi","Finnish");LANGUAGE_MAP.put("fr","French");LANGUAGE_MAP.put("fy","Frisian");LANGUAGE_MAP.put("gl","Galician");LANGUAGE_MAP.put("ka","Georgian");LANGUAGE_MAP.put("de","German");LANGUAGE_MAP.put("el","Greek");LANGUAGE_MAP.put("gu","Gujarati");LANGUAGE_MAP.put("ht","Haitian Creole");LANGUAGE_MAP.put("ha","Hausa");LANGUAGE_MAP.put("haw","Hawaiian");LANGUAGE_MAP.put("iw","Hebrew");LANGUAGE_MAP.put("hi","Hindi");LANGUAGE_MAP.put("hmn","Hmong");LANGUAGE_MAP.put("hu","Hungarian");LANGUAGE_MAP.put("is","Icelandic");LANGUAGE_MAP.put("ig","Igbo");LANGUAGE_MAP.put("id","Indonesian");LANGUAGE_MAP.put("ga","Irish");LANGUAGE_MAP.put("it","Italian");LANGUAGE_MAP.put("ja","Japanese");LANGUAGE_MAP.put("jw","Javanese");LANGUAGE_MAP.put("kn","Kannada");LANGUAGE_MAP.put("kk","Kazakh");LANGUAGE_MAP.put("km","Khmer");LANGUAGE_MAP.put("ko","Korean");LANGUAGE_MAP.put("ku","Kurdish (Kurmanji)");LANGUAGE_MAP.put("ky","Kyrgyz");LANGUAGE_MAP.put("lo","Lao");LANGUAGE_MAP.put("la","Latin");LANGUAGE_MAP.put("lv","Latvian");LANGUAGE_MAP.put("lt","Lithuanian");LANGUAGE_MAP.put("lb","Luxembourgish");LANGUAGE_MAP.put("mk","Macedonian");LANGUAGE_MAP.put("mg","Malagasy");LANGUAGE_MAP.put("ms","Malay");LANGUAGE_MAP.put("ml","Malayalam");LANGUAGE_MAP.put("mt","Maltese");LANGUAGE_MAP.put("mi","Maori");LANGUAGE_MAP.put("mr","Marathi");LANGUAGE_MAP.put("mn","Mongolian");LANGUAGE_MAP.put("my","Myanmar (Burmese)");LANGUAGE_MAP.put("ne","Nepali");LANGUAGE_MAP.put("no","Norwegian");LANGUAGE_MAP.put("ps","Pashto");LANGUAGE_MAP.put("fa","Persian");LANGUAGE_MAP.put("pl","Polish");LANGUAGE_MAP.put("pt","Portuguese");LANGUAGE_MAP.put("ma","Punjabi");LANGUAGE_MAP.put("ro","Romanian");LANGUAGE_MAP.put("ru","Russian");LANGUAGE_MAP.put("sm","Samoan");LANGUAGE_MAP.put("gd","Scots Gaelic");LANGUAGE_MAP.put("sr","Serbian");LANGUAGE_MAP.put("st","Sesotho");LANGUAGE_MAP.put("sn","Shona");LANGUAGE_MAP.put("sd","Sindhi");LANGUAGE_MAP.put("si","Sinhala");LANGUAGE_MAP.put("sk","Slovak");LANGUAGE_MAP.put("sl","Slovenian");LANGUAGE_MAP.put("so","Somali");LANGUAGE_MAP.put("es","Spanish");LANGUAGE_MAP.put("su","Sundanese");LANGUAGE_MAP.put("sw","Swahili");LANGUAGE_MAP.put("sv","Swedish");LANGUAGE_MAP.put("tg","Tajik");LANGUAGE_MAP.put("ta","Tamil");LANGUAGE_MAP.put("te","Telugu");LANGUAGE_MAP.put("th","Thai");LANGUAGE_MAP.put("tr","Turkish");LANGUAGE_MAP.put("uk","Ukrainian");LANGUAGE_MAP.put("ur","Urdu");LANGUAGE_MAP.put("uz","Uzbek");LANGUAGE_MAP.put("vi","Vietnamese");LANGUAGE_MAP.put("cy","Welsh");LANGUAGE_MAP.put("xh","Xhosa");LANGUAGE_MAP.put("yi","Yiddish");LANGUAGE_MAP.put("yo","Yoruba");LANGUAGE_MAP.put("zu","Zulu");}/*** 判断语言是否支持* @param language* @return*/public boolean isSupport(String language){if( null == LANGUAGE_MAP.get( language )){return false;}return true;}/** 获取 语言代码* ISO 639-1 code* @param desiredLang 语言* @return 如果返回null则标示不支持*/public String getCode(String desiredLang){if( null != LANGUAGE_MAP.get(desiredLang)){return desiredLang;}String tmp = desiredLang.toLowerCase();for(Map.Entry<String, String> enter : LANGUAGE_MAP.entrySet() ){if( enter.getValue().equals( tmp)){return enter.getKey();}}return null;}/*** 翻译文本* @param text  文本内容* @param sourceLang  文本所属语言。如果不知道，可以使用auto* @param targetLang  目标语言。必须是明确的有效的目标语言* @return* @throws Exception*/public String translateText(String text,String sourceLang, String targetLang) throws Exception{String retStr="";if( !( isSupport(sourceLang) || isSupport(targetLang) ) ){throw new Exception("不支持的语言类型");}List<NameValuePair> nvps = new ArrayList();nvps.add(new BasicNameValuePair("client", CLIENT));nvps.add(new BasicNameValuePair("sl", sourceLang));nvps.add(new BasicNameValuePair("tl", targetLang));nvps.add(new BasicNameValuePair("dt", "t"));nvps.add(new BasicNameValuePair("q", text));
//        String finalPath=PATH +"?client="+CLIENT+"&sl="+sourceLang+"&tl="+targetLang+"&dt=t&q="+ text ;String resp =  postHttp( PATH,nvps);if( null == resp ){throw  new Exception("网络异常");}//        System.out.println( "==>返回内容：" + resp);JSONArray jsonObject = JSONArray.parseArray( resp );for (Iterator<Object> it = jsonObject.getJSONArray(0).iterator(); it.hasNext(); ) {JSONArray a = (JSONArray) it.next();retStr += a.getString(0);}return retStr;}/*** post 请求* @param url 请求地址* @param nvps 参数列表* @return* @throws UnsupportedEncodingException*/private   String postHttp( String url ,List<NameValuePair> nvps){String responseStr = null;CloseableHttpClient httpclient = HttpClients.createDefault();HttpPost httpPost = new HttpPost( url );//重要！！必须设置 http 头，否则返回为乱码httpPost.setHeader("User-Agent",USER_AGENT);CloseableHttpResponse response2 = null;try {// 重要！！ 指定编码，对中文进行编码httpPost.setEntity( new UrlEncodedFormEntity(nvps, Charset.forName("UTF-8"))  );response2 = httpclient.execute(httpPost);HttpEntity entity2 = response2.getEntity();responseStr = EntityUtils.toString(entity2);EntityUtils.consume(entity2);} catch (IOException e) {e.printStackTrace();} finally {if (null != response2) {try {response2.close();} catch (IOException e) {e.printStackTrace();}}if( null != httpclient ){try {httpclient.close();} catch (IOException e) {e.printStackTrace();}}}return responseStr;}}

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