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 Files\Java\jdk1.8.0_152\jre\bin)

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