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本文實(shí)例講述了Java實(shí)現(xiàn)的百度語(yǔ)音識(shí)別功能。分享給大家供大家參考,具體如下:
SDK以及示例代碼下載地址: http://yuyin.baidu.com/sdk
最近一直在搞java,就選擇了java工程。將代碼拷過(guò)去。同時(shí)復(fù)制文件“test.pcm”到工程目錄下。就基本上可以了。
注:test.pcm是語(yǔ)音文件,可以用audacity軟件打開(kāi),選擇 文件->導(dǎo)入->裸數(shù)據(jù)。 設(shè)置采樣率為8000Hz。點(diǎn)擊播放就能聽(tīng)見(jiàn)聲音了。
這個(gè)時(shí)候程序跑起來(lái)還有問(wèn)題,需要將apiKey 以及secretKey填寫(xiě)上。這兩個(gè)值是你申請(qǐng)應(yīng)用對(duì)應(yīng)的分配好的。
cuid填本機(jī)mac地址就可以了,這個(gè)值我試過(guò)好像無(wú)所謂沒(méi)啥要求。
程序能跑起來(lái),并且按照正常返回識(shí)別的語(yǔ)音結(jié)果。但是返回結(jié)果的編碼為GBK,所以漢字顯示為亂碼,需要對(duì)其進(jìn)行一次轉(zhuǎn)碼。轉(zhuǎn)碼的代碼是我自己加上去的。
下面貼代碼:
package com.baidu.speech.serviceapi; import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLDecoder; import java.net.URLEncoder; import javax.xml.bind.DatatypeConverter; import org.json.JSONObject; public class Sample { private static final String serverURL = "http://vop.baidu.com/server_api"; private static String token = ""; private static final String testFileName = "test.pcm"; // 百度語(yǔ)音提供技術(shù)支持 //put your own params here // 下面3個(gè)值要填寫(xiě)自己申請(qǐng)的app對(duì)應(yīng)的值 private static final String apiKey = ""; private static final String secretKey = ""; private static final String cuid = ""; public static void main(String[] args) throws Exception { getToken(); method1(); method2(); } private static void getToken() throws Exception { String getTokenURL = "https://openapi.baidu.com/oauth/2.0/token?grant_type=client_credentials" + "&client_id=" + apiKey + "&client_secret=" + secretKey; HttpURLConnection conn = (HttpURLConnection) new URL(getTokenURL).openConnection(); token = new JSONObject(printResponse(conn)).getString("access_token"); } private static void method1() throws Exception { File pcmFile = new File(testFileName); HttpURLConnection conn = (HttpURLConnection) new URL(serverURL).openConnection(); // construct params JSONObject params = new JSONObject(); params.put("format", "pcm"); params.put("rate", 8000); params.put("channel", "1"); params.put("token", token); params.put("lan", "zh"); params.put("cuid", cuid); params.put("len", pcmFile.length()); params.put("speech", DatatypeConverter.printBase64Binary(loadFile(pcmFile))); // add request header conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "application/json; charset=utf-8"); conn.setDoInput(true); conn.setDoOutput(true); // send request DataOutputStream wr = new DataOutputStream(conn.getOutputStream()); wr.writeBytes(params.toString()); wr.flush(); wr.close(); printResponse(conn); } private static void method2() throws Exception { File pcmFile = new File(testFileName); HttpURLConnection conn = (HttpURLConnection) new URL(serverURL + "?cuid=" + cuid + "&token=" + token).openConnection(); // add request header conn.setRequestMethod("POST"); conn.setRequestProperty("Content-Type", "audio/pcm; rate=8000"); conn.setDoInput(true); conn.setDoOutput(true); // send request DataOutputStream wr = new DataOutputStream(conn.getOutputStream()); wr.write(loadFile(pcmFile)); wr.flush(); wr.close(); System.out.println(getUtf8String(printResponse(conn))); } private static String printResponse(HttpURLConnection conn) throws Exception { if (conn.getResponseCode() != 200) { // request error System.out.println("conn.getResponseCode() = " + conn.getResponseCode()); return ""; } InputStream is = conn.getInputStream(); BufferedReader rd = new BufferedReader(new InputStreamReader(is)); String line; StringBuffer response = new StringBuffer(); while ((line = rd.readLine()) != null) { response.append(line); response.append('\r'); } rd.close(); System.out.println(new JSONObject(response.toString()).toString(4)); return response.toString(); } private static byte[] loadFile(File file) throws IOException { InputStream is = new FileInputStream(file); long length = file.length(); byte[] bytes = new byte[(int) length]; int offset = 0; int numRead = 0; while (offset < bytes.length && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) { offset += numRead; } if (offset < bytes.length) { is.close(); throw new IOException("Could not completely read file " + file.getName()); } is.close(); return bytes; } // GBK編碼轉(zhuǎn)為UTF-8 private static String getUtf8String(String s) throws UnsupportedEncodingException { StringBuffer sb = new StringBuffer(); sb.append(s); String xmlString = ""; String xmlUtf8 = ""; xmlString = new String(sb.toString().getBytes("GBK")); xmlUtf8 = URLEncoder.encode(xmlString , "GBK"); return URLDecoder.decode(xmlUtf8, "UTF-8"); } }
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