Java实现文字转语音 - HelloWorld开发者社区

导入jar包

下载jacob-1.18.zip
并导入jacob.jar、json-20160810.jar、log4j-1.2.17.jar
将解压后的文件中jacob-1.18-x64.dll复制到对应的JDK中（我的是C:Program FilesJavajdk1.8.0_152jrein）

代码实例

package baidu.restapi.common;

import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.net.HttpURLConnection; import java.net.URLEncoder;

/**

与连接相关的Util类

*/ public class ConnUtil {

/**
 * UrlEncode， UTF-8 编码
 *
 * @param str 原始字符串
 * @return
 */
public static String urlEncode(String str) {
    String result = null;
    try {
        result = URLEncoder.encode(str, "UTF-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return result;
}

/**
 * 从HttpURLConnection 获取返回的字符串
 *
 * @param conn
 * @return
 * @throws IOException
 * @throws DemoException
 */
public static String getResponseString(HttpURLConnection conn) throws IOException, DemoException {
    return new String(getResponseBytes(conn));
}

/**
 * 从HttpURLConnection 获取返回的bytes
 * 注意 HttpURLConnection自身问题， 400类错误，会直接抛出异常。不能获取conn.getInputStream();
 *
 * @param conn
 * @return
 * @throws IOException   http请求错误
 * @throws DemoException http 的状态码不是 200
 */
public static byte[] getResponseBytes(HttpURLConnection conn) throws IOException, DemoException {
    int responseCode = conn.getResponseCode();
    if (responseCode != 200) {
        System.err.println("http 请求返回的状态码错误，期望200， 当前是 " + responseCode);
        if (responseCode == 401) {
            System.err.println("可能是appkey appSecret 填错");
        }
        throw new DemoException("http response code is" + responseCode);
    }

    InputStream inputStream = conn.getInputStream();
    byte[] result = getInputStreamContent(inputStream);
    return result;
}

/**
 * 将InputStream内的内容全部读取，作为bytes返回
 *
 * @param is
 * @return
 * @throws IOException @see InputStream.read()
 */
public static byte[] getInputStreamContent(InputStream is) throws IOException {
    byte[] b = new byte[1024];
    // 定义一个输出流存储接收到的数据
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    // 开始接收数据
    int len = 0;
    while (true) {
        len = is.read(b);
        if (len == -1) {
            // 数据读完
            break;
        }
        byteArrayOutputStream.write(b, 0, len);
    }
    return byteArrayOutputStream.toByteArray();
}

}

package baidu.restapi.common;

import org.json.JSONObject;

import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL;

/**

token的获取类
将apiKey和secretKey换取token，注意有效期保存在expiresAt

*/ public class TokenHolder {

public static final String ASR_SCOPE = "audio_voice_assistant_get";

public static final String TTS_SCOPE = "audio_tts_post";

/**
 * url , Token的url，http可以改为https
 */
private static final String url = "http://openapi.baidu.com/oauth/2.0/token";

/**
 * asr的权限 scope 是  "audio_voice_assistant_get"
 * tts 的权限 scope 是 "audio_tts_post"
 */
private String scope;

/**
 * 网页上申请语音识别应用获取的apiKey
 */
private String apiKey;

/**
 * 网页上申请语音识别应用获取的secretKey
 */
private String secretKey;

/**
 * 保存访问接口获取的token
 */
private String token;

/**
 * 当前的时间戳，毫秒
 */
private long expiresAt;

/**
 * @param apiKey    网页上申请语音识别应用获取的apiKey
 * @param secretKey 网页上申请语音识别应用获取的secretKey
 */
public TokenHolder(String apiKey, String secretKey, String scope) {
    this.apiKey = apiKey;
    this.secretKey = secretKey;
    this.scope = scope;
}

/**
 * 获取token，refresh 方法后调用有效
 *
 * @return
 */
public String getToken() {
    return token;
}

/**
 * 获取过期时间，refresh 方法后调用有效
 *
 * @return
 */
public long getExpiresAt() {
    return expiresAt;
}

/**
 * 获取token
 *
 * @return
 * @throws IOException   http请求错误
 * @throws DemoException http接口返回不是 200, access_token未获取
 */
public void resfresh() throws Exception {
    String getTokenURL = url + "?grant_type=client_credentials"
            + "&client_id=" + ConnUtil.urlEncode(apiKey) + "&client_secret=" + ConnUtil.urlEncode(secretKey);

    // 打印的url出来放到浏览器内可以复现
    System.out.println("token url:" + getTokenURL);

    URL url = new URL(getTokenURL);
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setConnectTimeout(5000);
    String result = ConnUtil.getResponseString(conn);
    System.out.println("Token result json:" + result);
    parseJson(result);
}

/**
 * @param result token接口获得的result
 * @throws DemoException
 */
private void parseJson(String result) throws Exception {
    JSONObject json = new JSONObject(result);
    if (!json.has("access_token")) {
        // 返回没有access_token字段
        throw new DemoException("access_token not obtained, " + result);
    }
    if (!json.has("scope")) {
        // 返回没有scope字段
        throw new DemoException("scopenot obtained, " + result);
    }
    if (!json.getString("scope").contains(scope)) {
        throw new DemoException("scope not exist, " + scope + "," + result);
    }
    token = json.getString("access_token");
    expiresAt = System.currentTimeMillis() + json.getLong("expires_in") * 1000;
}

}

package baidu.restapi.common;

public class DemoException extends Exception { public DemoException(String message) { super(message); } }

package baidu.restapi.ttsdemo;

import baidu.restapi.common.ConnUtil; import baidu.restapi.common.TokenHolder; import java.io.File; import java.io.FileOutputStream; import java.net.HttpURLConnection; import java.net.URL;

public class TtsMain {

public static void main(String[] args) throws Exception {
    (new TtsMain()).run();
}

//  填写网页上申请的appkey 如 $apiKey="g8eBUMSokVB1BHGmgxxxxxx"
private final String appKey = "4E1BG9lTnlSeIf1NQFlrSq6h";

// 填写网页上申请的APP SECRET 如 $secretKey="94dc99566550d87f8fa8ece112xxxxx"
private final String secretKey = "544ca4657ba8002e3dea3ac2f5fdd241";

// text 的内容为"欢迎使用百度语音合成"的urlencode,utf-8 编码
// 可以百度搜索"urlencode"
private final String text = "欢迎使用百度语音";

// 发音人选择, 0为普通女声，1为普通男生，3为情感合成-度逍遥，4为情感合成-度丫丫，默认为普通女声
private final int per = 0;
// 语速，取值0-9，默认为5中语速
private final int spd = 5;
// 音调，取值0-9，默认为5中语调
private final int pit = 5;
// 音量，取值0-9，默认为5中音量
private final int vol = 5;

public final String url = "http://tsn.baidu.com/text2audio"; // 可以使用https

private String cuid = "1234567JAVA";

private void run() throws Exception {
    TokenHolder holder = new TokenHolder(appKey, secretKey, TokenHolder.ASR_SCOPE);
    holder.resfresh();
    String token = holder.getToken();

    String url2 = url + "?tex=" + ConnUtil.urlEncode(text);
    url2 += "&per=" + per;
    url2 += "&spd=" + spd;
    url2 += "&pit=" + pit;
    url2 += "&vol=" + vol;
    url2 += "&cuid=" + cuid;
    url2 += "&tok=" + token;
    url2 += "&lan=zh&ctp=1";
    // System.out.println(url2); // 反馈请带上此url，浏览器上可以测试
    HttpURLConnection conn = (HttpURLConnection) new URL(url2).openConnection();
    conn.setConnectTimeout(5000);
    String contentType = conn.getContentType();
    if (contentType.contains("mp3")) {
        byte[] bytes = ConnUtil.getResponseBytes(conn);
        File file = new File("result.mp3"); // 打开mp3文件即可播放
        // System.out.println( file.getAbsolutePath());
        FileOutputStream os = new FileOutputStream(file);
        os.write(bytes);
        os.close();
        System.out.println("mp3 file write to " + file.getAbsolutePath());
    } else {
        System.err.println("ERROR: content-type= " + contentType);
        String res  = ConnUtil.getResponseString(conn);
        System.err.println(res);
    }
}

}

实现效果

Java实现文字转语音

Andriod第三方源码分析

Android进阶之旅-(NDK实战篇之OpenCV）

热门文章