Google Translate And Json Parsing - Google翻译与Json解析

颛孙嘉玉

2023-12-01

有时候我们需要翻译文章或是其他材料，会用到Google在线翻译，很好的工具。

但是每次打开网站，输入中文，copy返回的英文，会很麻烦，作为程序员，

应该尽可能地让电脑帮助我们完成繁琐的事情。

打开Google翻译地址：http://translate.google.cn/?hl=en#zh-CN/en/；

在左侧文本框输入“水杯”，右侧文本框会出现英文翻译：Cups。使用FireBug观察到，发送的请求为：

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。

利用这个请求url，我们便可以开始编程解决翻译的问题。

留意此链接的参数，将不需要的参数删除：

"http://translate.google.com/translate_a/t?client=t&hl=en&sl=zh-CN&tl=en&q="。

注意：当你在程序中使用该url与google服务器进行交互，返回的字符串是不规则的：

[[["Graduation project next week to reply , the system did not do a good job , I'm working papers ,","下周毕业设计答辩，系统没做好，论文没写完，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]],[["毕业设计",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]],"下周毕业设计答辩，系统没做好，论文没写完，呵呵"],["下周",5,[["next",1000,1,0],["next week",0,1,0],["next week to",0,1,0]],[[0,2]],""],["",6,[["week",1000,1,0]],,""],["答辩",7,[["to reply",1000,1,0],["respondent",0,1,0],["the respondent",0,1,0],["of reply",0,1,0]],[[6,8]],""],[", 系统",8,[[", the system",1000,0,0],["system",0,0,0],["the system",0,0,0]],[[8,11]],""],["没做好",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]],""],["没写完",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]],""],["论文",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]。

这是由于client参数引起的，将client参数设置为非"t"，则会返回Json格式的字符串（便于解析）：

{"sentences":[{"trans":"Graduation project next week to reply, the system did not do a good job, I'm working papers,","orig":"下周毕业设计答辩，系统没做好，论文没写完，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字符串有很多类库，我使用Jackson解析。仔细分析返回的Json字符串，意识到需要有两个java 实体类来作为被转换的对象。

public class Trans
{  
                private String trans;
                private String orig;
                private String translit;
                private String src_translit;
               // setters and getters omitted, 此处略去get，set方法
}

public class TransWrapper
{
              private Trans[] sentences;
              private String src;
              private String server_time;

              // setters and getters omitted, 此处略去get，set方法
}

下面进行主类的编写：

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);
                        // 这里需要格外注意，由于Google屏蔽程序请求谷歌翻译服务，所以这里我们需要设置"user-agent"来模拟浏览器进行操作.....
			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);
                        //当字符串比较长时，google会进行分段翻译，所以这里得到的是一个数组（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":"后场双枪受到限制，勇士还有人能挺身而出，马刺的状态也下滑，第二节双方差距缩小。",
	 * "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":"本节过半时，巴恩斯上篮得手，勇士只以44-47落后。",
	 * "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":"尽管此后近4分钟只投中一球，勇士仍紧追不舍。",
	 * "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":"本节还有1分45秒时，库里终于命中三分，勇士只以51-52落后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":"半场结束时，勇士以51-54处于劣势。",
	 * "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("后场双枪受到限制，勇士还有人能挺身而出，马刺的状态也下滑，第二节双方差距缩小。本节过半时，巴恩斯上篮得手，勇士只以44-47落后。尽管此后近4分钟只投中一球，勇士仍紧追不舍。本节还有1分45秒时，库里终于命中三分，勇士只以51-52落后1分。半场结束时，勇士以51-54处于劣势。", "utf-8");
		String term = URLEncoder.encode("下周毕业设计答辩，系统没做好，论文没写完，呵呵", "utf-8");
		Translator translator = new Translator();
		translator.translate(url, term);
	}
}

运行程序，控制台打印出：

Graduation project next week to reply, the system did not do a good job, I'm working papers,

See You, Readers.....

Google Translate And Json Parsing - Google翻译与Json解析

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