加密网络请求

public  class  AlidayuMessage {

    private  static  final  String SIGN_METHOD_MD5 =  "md5" ;
    private  static  final  String SIGN_METHOD_HMAC =  "hmac" ;
    private  static  final  String CHARSET_UTF8 =  "utf-8" ;
    private  static  final  String CONTENT_ENCODING_GZIP =  "gzip" ;

    private  static  final  String serverUrl =  "http://gw.api.taobao.com/router/rest" ;
    private  static  final  String appKey =  "xxxxx" ;   //你的appkey
    private  static  final  String appSecret =  "xxxxx" ;  //你的appSecret
    private  static  final  String sessionKey =  "" ;
    //业务参数
    private  static  String extend =  "" ;
    private  static  String sms_type =  "normal" ;
    private  static  String sms_free_sign_name =  "阿里大鱼" ;
    private  static  String sms_param =  "" ;
    private  static  String rec_num =  "" ;
    private  static  String sms_template_code =  "" ;

    /**
     * 短信接收号码。支持单个或多个手机号码，传入号码为11位手机号码，不能加0或+86。
     * 群发短信需传入多个号码，以英文逗号分隔，一次调用最多传入200个号码。示例：18600000000,13911111111,13322222222
     * 是否必须：必须
     * @param rec_num
     */
    public  static  void  setRecNum(String rec_num) {
        AlidayuMessage.rec_num = rec_num;
    }

    /**
     * 短信模板ID，传入的模板必须是在阿里大鱼“管理中心-短信模板管理”中的可用模板。示例：SMS_585014
     * 是否必须：必须
     * @param sms_template_code
     */
    public  static  void  setSmsTemplateCode(String sms_template_code) {
        AlidayuMessage.sms_template_code = sms_template_code;
    }

    /**
     * 短信模板变量，传参规则{"key":"value"}，key的名字须和申请模板中的变量名一致，多个变量之间以逗号隔开。
     * 示例：针对模板“验证码${code}，您正在进行${product}身份验证，打死不要告诉别人哦！”，
     * 传参时需传入{"code":"1234","product":"alidayu"}
     * 是否必须：可选
     * @param sms_param
     */
    public  static  void  setSmsParam(String sms_param) {
        AlidayuMessage.sms_param = sms_param;
    }

    /**
     * 短信签名，传入的短信签名必须是在阿里大鱼“管理中心-短信签名管理”中的可用签名。如“阿里大鱼”已在短信签名管理中通过审核，
     * 则可传入”阿里大鱼“（传参时去掉引号）作为短信签名。短信效果示例：【阿里大鱼】欢迎使用阿里大鱼服务。
     * 是否必须：必须
     * @param sms_free_sign_name
     */
    public  static  void  setSmsFreeSignName(String sms_free_sign_name) {
        AlidayuMessage.sms_free_sign_name = sms_free_sign_name;
    }

    /**
     * 公共回传参数，在“消息返回”中会透传回该参数；举例：用户可以传入自己下级的会员ID，在消息返回时，
     * 该会员ID会包含在内，用户可以根据该会员ID识别是哪位会员使用了你的应用
     * 是否必须：可选
     * @param extend
     */
    public  static  void  setExtend(String extend) {
        AlidayuMessage.extend = extend;
    }





    public  static  String SendMsg()  throws  IOException {
        Map params =  new  HashMap();
        // 公共参数
        params.put( "method" ,  "alibaba.aliqin.fc.sms.num.send" );
        params.put( "app_key" , appKey);
        params.put( "session" , sessionKey);
        DateFormat df =  new  SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );
        params.put( "timestamp" , df.format( new  Date()));
        params.put( "format" ,  "json" );
        params.put( "v" ,  "2.0" );
        params.put( "sign_method" ,  "hmac" );
        // 业务参数
        params.put( "extend" , extend);
        params.put( "sms_type" , sms_type);
        params.put( "sms_free_sign_name" , sms_free_sign_name);
        params.put( "sms_param" , sms_param);
        params.put( "rec_num" , rec_num);
        params.put( "sms_template_code" , sms_template_code);
        // 签名参数
        params.put( "sign" , signTopRequest(params, appSecret, SIGN_METHOD_HMAC));
        // 请用API
        return  callApi( new  URL(serverUrl), params);
    }







    private  static  String callApi(URL url, Map params)  throws  IOException {
        String query = buildQuery(params, CHARSET_UTF8);
        byte [] content = {};
        if  (query !=  null ) {
            content = query.getBytes(CHARSET_UTF8);
        }

        HttpURLConnection conn =  null ;
        OutputStream out =  null ;
        String rsp =  null ;
        try  {
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod( "POST" );
            conn.setDoInput( true );
            conn.setDoOutput( true );
            conn.setRequestProperty( "Host" , url.getHost());
            conn.setRequestProperty( "Accept" ,  "text/xml,text/javascript" );
            conn.setRequestProperty( "User-Agent" ,  "top-sdk-java" );
            conn.setRequestProperty( "Content-Type" ,  "application/x-www-form-urlencoded;charset="  + CHARSET_UTF8);
            out = conn.getOutputStream();
            out.write(content);
            rsp = getResponseAsString(conn);
        }  finally  {
            if  (out !=  null ) {
                out.close();
            }
            if  (conn !=  null ) {
                conn.disconnect();
            }
        }

        return  rsp;
    }

    private  static  String buildQuery(Map params, String charset)  throws  IOException {
        if  (params ==  null  || params.isEmpty()) {
            return  null ;
        }

        StringBuilder query =  new  StringBuilder();
        Set> entries = params.entrySet();
        boolean  hasParam =  false ;

        for  (Map.Entry entry : entries) {
            String name = entry.getKey();
            String value = entry.getValue();
            // 忽略参数名或参数值为空的参数
            if  (isNotEmpty(name) && isNotEmpty(value)) {
                if  (hasParam) {
                    query.append( "&" );
                }  else  {
                    hasParam =  true ;
                }

                query.append(name).append( "=" ).append(URLEncoder.encode(value, charset));
            }
        }

        return  query.toString();
    }

    private  static  String getResponseAsString(HttpURLConnection conn)  throws  IOException {
        String charset = getResponseCharset(conn.getContentType());
        if  (conn.getResponseCode() <  400 ) {
            String contentEncoding = conn.getContentEncoding();
            if  (CONTENT_ENCODING_GZIP.equalsIgnoreCase(contentEncoding)) {
                return  getStreamAsString( new  GZIPInputStream(conn.getInputStream()), charset);
            }  else  {
                return  getStreamAsString(conn.getInputStream(), charset);
            }
        }  else  { // Client Error 4xx and Server Error 5xx
            throw  new  IOException(conn.getResponseCode() +  " "  + conn.getResponseMessage());
        }
    }

    private  static  String getResponseCharset(String ctype) {
        String charset = CHARSET_UTF8;
        if  (isNotEmpty(ctype)) {
            String[] params = ctype.split( ";" );
            for  (String param : params) {
                param = param.trim();
                if  (param.startsWith( "charset" )) {
                    String[] pair = param.split( "=" ,  2 );
                    if  (pair.length ==  2 ) {
                        if  (isNotEmpty(pair[ 1 ])) {
                            charset = pair[ 1 ].trim();
                        }
                    }
                    break ;
                }
            }
        }
        return  charset;
    }

    private  static  String getStreamAsString(InputStream stream, String charset)  throws  IOException {
        try  {
            Reader reader =  new  InputStreamReader(stream, charset);
            StringBuilder response =  new  StringBuilder();

            final  char [] buff =  new  char [ 1024 ];
            int  read =  0 ;
            while  ((read = reader.read(buff)) >  0 ) {
                response.append(buff,  0 , read);
            }

            return  response.toString();
        }  finally  {
            if  (stream !=  null ) {
                stream.close();
            }
        }
    }

    /**
     * 对TOP请求进行签名。
     */
    private  static  String signTopRequest(Map params, String secret, String signMethod)  throws  IOException {
        // 第一步：检查参数是否已经排序
        String[] keys = params.keySet().toArray( new  String[ 0 ]);
        Arrays.sort(keys);
        // 第二步：把所有参数名和参数值串在一起
        StringBuilder query =  new  StringBuilder();
        if  (SIGN_METHOD_MD5.equals(signMethod)) {
            query.append(secret);
        }
        for  (String key : keys) {
            String value = params.get(key);
            if  (isNotEmpty(key) && isNotEmpty(value)) {
                query.append(key).append(value);
            }
        }
        // 第三步：使用MD5/HMAC加密
        byte [] bytes;
        if  (SIGN_METHOD_HMAC.equals(signMethod)) {
            bytes = encryptHMAC(query.toString(), secret);
        }  else  {
            query.append(secret);
            bytes = encryptMD5(query.toString());
        }
        // 第四步：把二进制转化为大写的十六进制
        return  byte2hex(bytes);
    }

    /**
     * 把字节流转换为十六进制表示方式。
     */
    private  static  String byte2hex( byte [] bytes) {
        StringBuilder sign =  new  StringBuilder();
        for  ( int  i =  0 ; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] &  0xFF );
            if  (hex.length() ==  1 ) {
                sign.append( "0" );
            }
            sign.append(hex.toUpperCase());
        }
        return  sign.toString();
    }
    /**
     * 对字节流进行HMAC_MD5摘要。
     */
    private  static  byte [] encryptHMAC(String data, String secret)  throws  IOException {
        byte [] bytes =  null ;
        try  {
            SecretKey secretKey =  new  SecretKeySpec(secret.getBytes(CHARSET_UTF8),  "HmacMD5" );
            Mac mac = Mac.getInstance(secretKey.getAlgorithm());
            mac.init(secretKey);
            bytes = mac.doFinal(data.getBytes(CHARSET_UTF8));
        }  catch  (GeneralSecurityException gse) {
            throw  new  IOException(gse.toString());
        }
        return  bytes;
    }

    /**
     * 对字符串采用UTF-8编码后，用MD5进行摘要。
     */
    private  static  byte [] encryptMD5(String data)  throws  IOException {
        return  encryptMD5(data.getBytes(CHARSET_UTF8));
    }
    /**
     * 对字节流进行MD5摘要。
     */
    private  static  byte [] encryptMD5( byte [] data)  throws  IOException {
        byte [] bytes =  null ;
        try  {
            MessageDigest md = MessageDigest.getInstance( "MD5" );
            bytes = md.digest(data);
        }  catch  (GeneralSecurityException gse) {
            throw  new  IOException(gse.toString());
        }
        return  bytes;
    }

    private  static  boolean  isNotEmpty(String value) {
        int  strLen;
        if  (value ==  null  || (strLen = value.length()) ==  0 ) {
            return  false ;
        }
        for  ( int  i =  0 ; i < strLen; i++) {
            if  ((Character.isWhitespace(value.charAt(i)) ==  false )) {
                return  true ;
            }
        }
        return  false ;
    }
}