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"; // 百度語音提供技術(shù)支持  //put your own params here  // 下面3個值要填寫自己申請的app對應(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");  }}