1、科大訊飛平臺：http://www.xfyun.cn/doccenter/java
     註冊並建立應用，下載SDK，選擇語音聽寫+Java+建立的應用(APPID)；
     未提交稽核的應用，服務量會有500次/日的限制，開發完成後提交稽核解除限制；

     SDK裡面的Sample功能直接匯入eclipse，編譯執行，支援粵語；

2、百度http://yuyin.baidu.com/
     註冊並 建立應用，下載REST API的壓縮文件，提供Http介面支援整段錄音檔案的識別；
     原始語音的錄音格式目前支援評測 8k/16k 取樣率 16bit 位深的單聲道語音；
     壓縮格式支援：pcm（不壓縮）、wav、opus、speex、amr、x-flac；
     語音識別服務開通成功後即可獲得 50000次/日 的線上識別呼叫配額；

     http://yuyin.baidu.com/docs/asr/57

     Sample程式碼

package org.asr.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.net.HttpURLConnection;
import java.net.URL;

import javax.xml.bind.DatatypeConverter;

import org.asr.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";
    private static final String testFileName = "D:\\tmp\\1.wav";
    //put your own params here
    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("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();

        printResponse(conn);
    }

    private static String printResponse(HttpURLConnection conn) throws Exception {
        if (conn.getResponseCode() != 200) {
            // request error
            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;
    }
}
 

3）兩個平臺都提供相對詳細的開發者教程，Demo也可以直接使用，相對來說科大訊飛平臺支援方言和語音訓練，百度暫時沒發現有語音訓練功能。