1.增加maven pom.xml 以下jar包：
          
            org.jsoup
            jsoup
            1.11.3
        
        
            com.alibaba
            fastjson
            1.2.68
        
          2.java代码：
package com.test;
import java.io.*;
import java.net.*;
import com.alibaba.fastjson.JSONObject;
import java.util.HashMap;
import java.util.Map;

/**
 *小马配音 文字转语音 API http://peiyin.xiaomawenku.com/api.html
 *
 * HTTP方式調用接口
 * 充值地址：http://peiyin.xiaomawenku.com/svip_api.html?svip_type_pay=1
 *
 */
public class HttpXiaoMaPeiYin {

    public static void main(String[] args) {

            getXiaomapeiyin();

    }

    private static void getXiaomapeiyin() {
        try {
     String urlStr = "http://peiyin.xiaomawenku.com/PeiYin/xiaomapeiyin_api_to_peiyin";


        Map params=new HashMap();
        //xiaomapeiyin_svip_user_id
        params.put("xiaomapeiyin_svip_user_id", "3339");
        //xiaomapeiyin_svip_token客服给你的秘钥
        params.put("xiaomapeiyin_svip_token", "xiaomapeiyinapi123d823339be5148e80aca9ea8ad942b13a3faccfbe1c91df0e9b");
        //: 配音内容
        String xiaomapeiyin_text="1小马配音123";
        //内容编码
        //xiaomapeiyin_text =URLEncoder.encode(xiaomapeiyin_text, "UTF-8");
        params.put("xiaomapeiyin_text", xiaomapeiyin_text);
        //: 采样率 不用动
        params.put("caiyanglv", "8");
        //: 格式后缀  不用动
        params.put("geshi", "3");
        //: 主播id
        params.put("renming_id", "19");
        // : 音调
        params.put("pitchRate", "0");
        //: 语速
        params.put("speechRate", "0");
        // : 音量
        params.put("volume", "50");
        //: 背景音乐
        params.put("bgurl", "");
// post参数
        StringBuilder postData = new StringBuilder();
        for (Map.Entry param : params.entrySet()) {
            if (postData.length() != 0) {
                postData.append('&');
            }

                postData.append(URLEncoder.encode(param.getKey(), "UTF-8"));

            postData.append('=');

                postData.append(URLEncoder.encode(String.valueOf(param.getValue()), "UTF-8"));

        }

        byte[] postDataBytes = new byte[0];

            postDataBytes = postData.toString().getBytes("UTF-8");


        //开始访问
        HttpURLConnection conn = (HttpURLConnection)(new URL(urlStr)).openConnection();
        conn.setRequestMethod("POST");

        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length));
        conn.setConnectTimeout(99999999);
        conn.setReadTimeout(99999999);
        conn.setDoOutput(true);

        conn.getOutputStream().write(postDataBytes);


        Reader in = null;

            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));


        StringBuilder sb = new StringBuilder();
        for (int c; (c = in.read()) >= 0;) {
            sb.append((char)c);
        }


       in.close();

        conn.disconnect();

        String responseStr = sb.toString();
            System.out.println(responseStr);
            JSONObject outJson = JSONObject.parseObject(responseStr);
            //json结果解析 xiaomapeiyin_result_url
            JSONObject outJsonq = JSONObject.parseObject(outJson.get("data").toString());
            System.out.println(outJsonq.toString());
            String xiaomapeiyin_result_url= outJsonq.get("xiaomapeiyin_result_url").toString();
         //获得配音音频文件地址
            System.out.println(xiaomapeiyin_result_url);
          //然后流式下载即可保存mp3
            /**
             * 下载音频
             */
            //开始访问
            HttpURLConnection conn2 = (HttpURLConnection)(new URL(xiaomapeiyin_result_url)).openConnection();

            conn2.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            conn2.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length));
            conn2.setConnectTimeout(999999);
            conn2.setReadTimeout(999999);
            conn2.setDoOutput(true);
            conn.connect();
            // 写盘 配音文件存到本地磁盘

            RandomAccessFile file = new RandomAccessFile("xiaomapeiyin.mp3" , "rw");
            InputStream stream = conn2.getInputStream();
            byte buffer[] = new byte[1024];
            while (true) {
                int len = stream.read(buffer);
                if (len == -1) {
                    break;
                }
                file.write(buffer, 0, len);
            }
            if (file != null) {
                file.close();
            }
            if (stream != null) {
                stream.close();
            }
            conn2.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}