有時候我們需要翻譯文章或是其他材料，會用到Google在線翻譯，很好的工具。
但是每次打開網站，輸入中文，copy返回的英文，會很麻煩，作爲程序員，
應該儘可能地讓電腦幫助我們完成繁瑣的事情。
打開Google翻譯地址：http://translate.google.cn/?hl=en#zh-CN/en/；
在左側文本框輸入“水杯”，右側文本框會出現英文翻譯：Cups。使用FireBug觀察到，發送的請求爲：
http://translate.google.cn/translate_a/t?
client=t&hl=en&sl=zh-CN&tl=en&ie=UTF-8&oe=UTF-8&multires=1
&oc=2&otf=1&ssel=0&tsel=0&sc=1&q=%E6%B0%B4%E6%9D%AF。
利用這個請求url，我們便可以開始編程解決翻譯的問題。
留意此鏈接的參數，將不需要的參數刪除：
"http://translate.google.com/translate_a/t?client=t&hl=en&sl=zh-CN&tl=en&q="。
注意：當你在程序中使用該url與google服務器進行交互，返回的字符串是不規則的：
[[["Graduation project next week to reply , the system did not do a good job , I'm working papers ,","下週畢業設計答辯，系統沒做好，論文沒寫完，呵呵","","Xià zhōu bìyè shèjì dábiàn, xìtǒng méi zuò hǎo, lùnwén méi xiě wán, hēhē"]],,"zh-CN",,[["Graduation project",[4],0,0,1000,0,2,0],["next",[5],1,0,1000,2,3,0],["week",[6],1,0,1000,3,4,0],["to reply",[7],1,0,1000,4,6,0],[", the system",[8],0,0,1000,6,9,0],["did not do a good job",[9],1,0,1000,9,15,0],[",",[10],0,0,1000,15,16,0],["I'm working",[11],1,0,1000,16,19,0],["papers",[12],1,0,1000,19,20,0],[",",[13],0,0,1000,20,21,0]],[["畢業 設計",4,[["Graduation project",1000,0,0],["graduate design",0,0,0],["graduation design",0,0,0],["graduated from the design",0,0,0]],[[2,6]],"下週畢業設計答辯，系統沒做好，論文沒寫完，呵呵"],["下週",5,[["next",1000,1,0],["next week",0,1,0],["next week to",0,1,0]],[[0,2]],""],["",6,[["week",1000,1,0]],,""],["答辯",7,[["to reply",1000,1,0],["respondent",0,1,0],["the respondent",0,1,0],["of reply",0,1,0]],[[6,8]],""],[", 系統",8,[[", the system",1000,0,0],["system",0,0,0],["the system",0,0,0]],[[8,11]],""],["沒 做好",9,[["did not do a good job",1000,1,0],["not doing",0,1,0],["did not do",0,1,0],["not done well",0,1,0],["have not done well",0,1,0]],[[11,14]],""],[",",10,[[",",1000,0,0],["and",0,0,0]],[[14,15]],""],["沒 寫完",11,[["I'm working",1000,1,0],["did not finish",0,1,0],["not finished",0,1,0],["had not finished",0,1,0]],[[17,20]],""],["論文",12,[["papers",1000,1,0],["paper",0,1,0],["thesis",0,1,0],["dissertation",0,1,0]],[[15,17]],""],[",",13,[[",",1000,0,0],["and",0,0,0]],[[20,21]],""]],,,[["zh-CN"]],209]。
這是由於client參數引起的，將client參數設置爲非"t"，則會返回Json格式的字符串（便於解析）：
{"sentences":[{"trans":"Graduation project next week to reply, the system did not do a good job, I'm working papers,","orig":"下週畢業設計答辯，系統沒做好，論文沒寫完，呵呵","translit":"","src_translit":"Xià zhōu bìyè shèjì dábiàn, xìtǒng méi zuò hǎo, lùnwén méi xiě wán, hēhē"}],"src":"zh-CN","server_time":343} 。
解析Json字符串有很多類庫，我使用Jackson解析。仔細分析返回的Json字符串，意識到需要有兩個java 實體類來作爲被轉換的對象。
public class Trans
{
private String trans;
private String orig;
private String translit;
private String src_translit;
// setters and getters omitted, 此處略去get，set方法
}public class TransWrapper
{
private Trans[] sentences;
private String src;
private String server_time;
// setters and getters omitted, 此處略去get，set方法
}下面進行主類的編寫：
public class Translator
{
//http://translate.google.com/translate_a/t?client=t&hl=en&sl=zh-CN&tl=en&ie=UTF-8&oe=UTF-8&multires=1&ssel=0&tsel=0&sc=1&q=%E6%80%9D%E6%83%B3%E5%BE%88%E6%B7%B7%E4%B9%B1
//http://translate.google.com/#zh-CN/en/
public void translate(String url, String term)
{
try
{
System.out.println(url + term);
URL target = new URL(url + term);
// 這裏需要格外注意，由於Google屏蔽程序請求谷歌翻譯服務，所以這裏我們需要設置"user-agent"來模擬瀏覽器進行操作.....
HttpURLConnection connection = (HttpURLConnection)target.openConnection();
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; rv:20.0) Gecko/20100101 Firefox/20.0");
connection.setDoOutput(true);
connection.setDoInput(true);
InputStream is = connection.getInputStream();
BufferedInputStream bis = new BufferedInputStream(is);
StringBuffer sb = new StringBuffer();
byte[] read = new byte[4096];
int length;
while(-1 != (length = bis.read(read, 0, read.length)))
sb.append(new String(read, 0, length));
System.out.println(sb.toString());
ObjectMapper om = new ObjectMapper();
TransWrapper transWrapper = om.readValue(sb.toString(), TransWrapper.class);
//當字符串比較長時，google會進行分段翻譯，所以這裏得到的是一個數組（注意：不是List）
Trans[] trans = transWrapper.getSentences();
String translation = "";
for(Trans tran : trans)
{
translation += tran.getTrans();
}
System.out.println(translation);
}
catch (Exception e)
{
e.printStackTrace();
}
/*Reader reader = new StringReader(new String(read));
System.out.println(reader.);*/
}
/*
* {"sentences":
* [
*
* {"trans":"The backcourt Spear is restricted, the Warriors also be able to come forward, the state of the Spurs also fell, Section II to narrow the gap. ",
* "orig":"後場雙槍受到限制，勇士還有人能挺身而出，馬刺的狀態也下滑，第二節雙方差距縮小。",
* "translit":"",
* "src_translit":"Hòu chǎng shuāng qiāng shòudào xiànzhì, yǒngshì hái yǒurén néng tǐngshēn ér chū, mǎcì de zhuàngtài yě xiàhuá, dì èr jié shuāngfāng chājù suōxiǎo."},
*
*
* {"trans":"More than half of this section, Barnes layup, the Warriors only 44-47 behind. ",
* "orig":"本節過半時，巴恩斯上籃得手，勇士只以44-47落後。",
* "translit":"",
* "src_translit":"Běn jié guòbàn shí, ba ēn sī shàng lán déshǒu, yǒngshì zhǐ yǐ 44-47 luòhòu."},
*
*
* {"trans":"Despite nearly four minutes later only to hit a ball, the Warriors are still in hot pursuit. ",
* "orig":"儘管此後近4分鐘只投中一球，勇士仍緊追不捨。",
* "translit":"",
* "src_translit":"Jǐnguǎn cǐhòu jìn 4 fēnzhōng zhǐ tóu zhòng yī qiú, yǒngshì réng jǐn zhuī bù shě."},
*
*
* {"trans":"This section there are 1 minute 45 seconds, Curry finally hit the third, the Warriors 51-52 only 1 point behind. ",
* "orig":"本節還有1分45秒時，庫裏終於命中三分，勇士只以51-52落後1分。",
* "translit":"",
* "src_translit":"Běn jié hái yǒu 1 fēn 45 miǎo shí, kù lǐ zhōngyú mìngzhòng sān fēn, yǒngshì zhǐ yǐ 51-52 luòhòu 1 fēn."},
*
*
*
* {"trans":"The end of the half, the Warriors 51-54 at a disadvantage.",
* "orig":"半場結束時，勇士以51-54處於劣勢。",
* "translit":"",
* "src_translit":"Bàn chǎng jiéshù shí, yǒngshì yǐ 51-54 chǔyú lièshì."}
*
* ],
*
*
* "src":"zh-CN",
* "server_time":1
*
* }
*/
public static void main(String[] args) throws UnsupportedEncodingException
{
// String url = "http://translate.google.com/translate_a/t?client=t&hl=en&sl=zh-CN&tl=en&ie=UTF-8&oe=UTF-8&multires=1&ssel=0&tsel=0&sc=1&q=";
String url = "http://translate.google.com/translate_a/t?client=p&hl=en&sl=zh-CN&tl=en&q=";
//String term = URLEncoder.encode("後場雙槍受到限制，勇士還有人能挺身而出，馬刺的狀態也下滑，第二節雙方差距縮小。本節過半時，巴恩斯上籃得手，勇士只以44-47落後。儘管此後近4分鐘只投中一球，勇士仍緊追不捨。本節還有1分45秒時，庫裏終於命中三分，勇士只以51-52落後1分。半場結束時，勇士以51-54處於劣勢。", "utf-8");
String term = URLEncoder.encode("下週畢業設計答辯，系統沒做好，論文沒寫完，呵呵", "utf-8");
Translator translator = new Translator();
translator.translate(url, term);
}
}運行程序，控制檯打印出：
Graduation project next week to reply, the system did not do a good job, I'm working papers,See You, Readers.....