电信smgp3.0发短信出现乱码

各位大侠，最近在做电信smgp协议下发短信功能，电信只提供了sp号，网上找了个smgp开发包和文档里面有测试用例，当我在该开发包中测试（开发包编码为gbk）发送的短信能正常在手机上显示，将开发包改为utf-8发出的是乱码，因为我们系统是统一UTF-8，将开发包打成jar放入系统中跑在tomcat发送短信也是乱码，主要代码为一下：

Java codeSMGP3 smgp = new SMGP3();
         int socketID=smgp.SMGP_Connect("124.126.119.17",8890, "test",
         "test",(byte)0);// 连接正常
        if (socketID > 0) {
            int test_ret = smgp.SMGPActiveTest(socketID);
            if (test_ret == 0) {
                TSMGP_SUBMIT submit = new TSMGP_SUBMIT();
                submit.cMsgType = 6;
                submit.cNeedReport = 1;
                submit.cPriority = 0;
                submit.sServiceID = "PC2P";
                submit.sFeeType = "00";
                submit.sFeeCode = "0";
                submit.sFixedFee = "0";
                submit.sValidTime = "";
                submit.sAtTime = "";
                submit.sSrcTermID = "106590290015";
                submit.sChargeTermID = "106590290015";
                submit.sDestTermID = "15332319099"
                submit.ucMsgFormat = 15;       // 设置消息体编码格式    8：ucs2,15为gbk18030                submit.sMsgContent =content;// sxit测试短信5555566";
                submit.sReserve = "";

                TSMGP_TLV tlv = new TSMGP_TLV();

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