netty使用

今天使用netty搭建了个架子。具体请看代码。

引入jar包 ：netty-all-4.1.0.Final.jar

package grp.pb.branch.shanxijs.netty;

import io.netty.bootstrap.ServerBootstrap;  
import io.netty.channel.ChannelFuture;  
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;  
import io.netty.channel.ChannelOption;  
import io.netty.channel.EventLoopGroup;  
import io.netty.channel.nio.NioEventLoopGroup;  
import io.netty.channel.socket.SocketChannel;  
import io.netty.channel.socket.nio.NioServerSocketChannel;  
  
/** 
 *  
 * Netty中，通讯的双方建立连接后，会把数据按照ByteBuf的方式进行传输， 
 * 例如http协议中，就是通过HttpRequestDecoder对ByteBuf数据流进行处理，转换成http的对象。 
 *  
 */  
public class SimpleServer {  
    private int port;
    private ChannelInboundHandlerAdapter adapter;
  
    public SimpleServer(int port , ChannelInboundHandlerAdapter  adapter) {  
        this.port = port;  
        this.adapter = adapter;
    }  
  
    public void run() throws Exception {  
        //EventLoopGroup是用来处理IO操作的多线程事件循环器  
        //bossGroup 用来接收进来的连接  
        EventLoopGroup bossGroup = new NioEventLoopGroup();   
        //workerGroup 用来处理已经被接收的连接  
        EventLoopGroup workerGroup = new NioEventLoopGroup();  
        try {  
            //启动 NIO 服务的辅助启动类  
            ServerBootstrap b = new ServerBootstrap();   
            b.group(bossGroup, workerGroup)  
                //配置 Channel  
                .channel(NioServerSocketChannel.class)  
                .childHandler(new ChannelInitializer<SocketChannel>() {   
                        @Override  
                        public void initChannel(SocketChannel ch) throws Exception {  
                            // 注册handler    
                            ch.pipeline().addLast(adapter);  
                        }  
                    })  
                .option(ChannelOption.SO_BACKLOG, 128)   
                .childOption(ChannelOption.SO_KEEPALIVE, true);   
  
            // 绑定端口，开始接收进来的连接  
            ChannelFuture f = b.bind(port).sync();  
            // 等待服务器 socket 关闭 。  
            f.channel().closeFuture().sync();  
        } finally {  
            workerGroup.shutdownGracefully();  
            bossGroup.shutdownGracefully();  
        }  
    }  
      

}  

package grp.pb.branch.shanxijs.netty;
import grp.pb.branch.shanxijs.header.ss.impl.ISelfSignService;
import grp.pt.pb.ss.ISelfCounterService;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

import java.io.ByteArrayInputStream;

import org.apache.log4j.Logger;

@Sharable
public class SimpleServerHandler extends ChannelInboundHandlerAdapter {
    
    private static Logger log = Logger.getLogger(SimpleServerHandler.class);
    private ISelfSignService selfSignService = null;
    private static String CHAR_SET = "gbk";
    
    public SimpleServerHandler(ISelfSignService selfCounterService){
        super();
        this.selfSignService = selfCounterService;
    }
    
    @Override  
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {  
        System.out.println("SimpleServerHandler.channelRead");  
        ByteBuf result = (ByteBuf) msg;  
        byte[] result1 = new byte[result.readableBytes()];  
        // msg中存储的是ByteBuf类型的数据，把数据读取到byte[]中  
        result.readBytes(result1);  
        // 接收并打印客户端的信息  
        log.info("接收报文:" + new String(result1,CHAR_SET));  
        // 释放资源，这行很关键  
        result.release();  
        // 向客户端发送消息  
        //执行自助柜面的操作
        byte[] response = selfSignService.doTask(new ByteArrayInputStream(result1)); 
        log.info("发送报文:" + new String(response,CHAR_SET));  
        // 在当前场景下，发送的数据必须转换成ByteBuf数组  
        ByteBuf encoded = ctx.alloc().buffer(response.length);  
        encoded.writeBytes(response);  
        ctx.write(encoded);  
        ctx.flush();  
    }  
  
    @Override  
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {  
        // 当出现异常就关闭连接  
        cause.printStackTrace();  
        ctx.close();  
    }  
  
    @Override  
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {  
        ctx.flush();  
    }  
  
}  

package grp.pb.branch.shanxijs.ss.job;

import grp.pb.branch.shanxijs.header.ss.impl.ISelfSignService;
import grp.pb.branch.shanxijs.netty.SimpleServer;
import grp.pb.branch.shanxijs.netty.SimpleServerHandler;
import grp.pt.pb.common.AutoJobAdapter;
import grp.pt.pb.exception.PbException;
import grp.pt.pb.job.SelfCounterAutoTaskJob;
import grp.pt.pb.ss.ISelfCounterService;
import grp.pt.pb.trans.util.SocketUtil;
import grp.pt.pb.util.PropertiesHander;
import grp.pt.pb.util.StaticApplication;
import grp.pt.util.exception.CommonException;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

import org.apache.log4j.Logger;

/**
 * 与自助柜面衔接的自动任务 使用netty进行传输
 * @author lth
 *
 */
public class JSSignServerNettyJob extends AutoJobAdapter {
    
    private static Logger log = Logger.getLogger(SelfCounterAutoTaskJob.class);
    /**
     * 服务端socket
     */
    private static SimpleServer serverSocket = null;
    
    private static ISelfSignService selfSignService =  null;
        
    @Override
    public void executeJob() {
        init();
        try {
            serverSocket.run();
        } catch (Exception e) {
            log.error("自助柜面自动任务处理失败", e);
        } 
        
    }
    
    private void init() {
    
        if (selfSignService == null) {
            selfSignService = (ISelfSignService) StaticApplication.getBean("jsSelfSignServiceImpl");
        }

        try {
            if(serverSocket == null){
                int port = Integer.valueOf(PropertiesHander.getValue("trans", "selfCounterPort"));
                SimpleServerHandler adapter = new SimpleServerHandler(selfSignService);
                serverSocket = new SimpleServer(port,adapter);
            }
        } catch (Exception e) {
            log.error(e.getMessage(),e);
            throw new PbException("创建端口为：" + PropertiesHander.getValue("trans", "selfCounterPort") + "的服务端Socket失败！");
        }
        log.info("自助柜面服务已启动，监听端口为:"+PropertiesHander.getValue("trans", "selfCounterPort"));
    
    }


}

package grp.pb.branch.shanxijs.header.ss.impl;

import grp.pt.pb.exception.PbException;
import grp.pt.pb.ss.model.TransResultDTO;
import grp.pt.pb.ss.util.SsConstant;
import grp.pt.pb.trans.model.TransReturnDTO;
import grp.pt.pb.trans.util.SocketUtil;
import grp.pt.pb.trans.util.TransUtil;
import grp.pt.pb.util.XmlUtils;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;

/**
 * 处理 晋商银行自助柜面与柜面衔接业务    的   报文拼装解析工具类
 * 
 */
public class JSSelfSignServiceImpl implements ISelfSignService {
    private static Logger logger = Logger.getLogger(JSSelfSignServiceImpl.class);
    //业务处理类
    private JSSelfCounterBusinessServiceImpl jsSelfCounterBusinessServiceImpl = null;

    public JSSelfCounterBusinessServiceImpl getJsSelfCounterBusinessServiceImpl() {
        return jsSelfCounterBusinessServiceImpl;
    }

    public void setJsSelfCounterBusinessServiceImpl(
            JSSelfCounterBusinessServiceImpl jsSelfCounterBusinessServiceImpl) {
        this.jsSelfCounterBusinessServiceImpl = jsSelfCounterBusinessServiceImpl;
    }

    @Override
    public byte[] doTask(ByteArrayInputStream in) throws UnsupportedEncodingException {
        TransResultDTO resultDto = null;
        byte[] resMsgByte = null;
        JSSelfCounterMsgBody msgBody = null;
        try {
            // 解析
            msgBody = this.doParser(in);
            // 调用自助柜面业务层接口
            resultDto = this.doBusiness(msgBody);
            // 生成成功的响应报文
            resMsgByte = this.doResponse(msgBody.getMsgHead().getTransCode(),resultDto, msgBody);
        } catch (Exception e) {
            logger.error("交易失败", e);
            resMsgByte = this.errorResponse(e.getMessage(),msgBody.getMsgHead().getTransCode());
        }
        return resMsgByte;
    }

    /**
     * 解析请求报文
     * @param in
     * @return
     * @throws Exception
     */
    private JSSelfCounterMsgBody doParser(InputStream in) throws Exception {
        
        //1.解析报文头
        byte[] reqMsgHead = SocketUtil.read(in,
                JSSelfCounterConstant.CTJ_REQ_HEAD_LEN + 6);
        JSSelfCounterMsgHead reqHead = this.parsToMsgHead(reqMsgHead);
        
        //2.解析报文体
        byte[] reqMsgBody = SocketUtil.read(in, reqHead.getMsgLen()
                - JSSelfCounterConstant.CTJ_REQ_HEAD_LEN);

        logger.info("交易码是："+reqHead.getTransCode());
        JSSelfCounterMsgBody reqBody = this.parseToMsgBody(reqMsgBody,reqHead.getTransCode());
        reqBody.setMsgHead(reqHead);

        return reqBody;
    }
    
    /**
     * 解析报文头
     * 
     * @param headBytes
     * @return
     */
    private JSSelfCounterMsgHead parsToMsgHead(byte[] headBytes) {
        // 6位报文长度
        int msgLen = Integer.valueOf(new String(headBytes, 0, 6).trim());
        // 4位交易码
        String trans_code = new String(headBytes, 6, 4);
    
        JSSelfCounterMsgHead reqHead = new JSSelfCounterMsgHead(msgLen, trans_code);
        return reqHead;
    }
    /**
     * 解析请求报文体
     * @return
     * @throws UnsupportedEncodingException 
     * @throws DocumentException 
     * @throws Exception
     */
    private JSSelfCounterMsgBody parseToMsgBody(byte[] reqMsgBody, String transCode) throws UnsupportedEncodingException, DocumentException {
        JSSelfCounterMsgBody msgBody = new JSSelfCounterMsgBody();
        String msg = new String(reqMsgBody,JSSelfCounterConstant.CHAR_SET);
        Document document=DocumentHelper.parseText(msg);

        //签约接口
        if(JSSelfCounterConstant.SIGN.equalsIgnoreCase(transCode)){
            getMsgBody4Sign(msgBody, document);
        //修改客户信息
        }else if(JSSelfCounterConstant.UPDATE_CUSTOMER_INFO.equalsIgnoreCase(transCode)){
            getMsgBody4UpdateCustomerInfo(msgBody, document);
        //注销客户
        }else if(JSSelfCounterConstant.CANCEL_CUSTOMER.equalsIgnoreCase(transCode)){
            getMsgBody4CancelCustomer(msgBody, document);
        //更新操作员 
        }else if(JSSelfCounterConstant.UPDATE_OPERATOR_INFO.equalsIgnoreCase(transCode)){
            getMsgBody4UpdateOperatorInfo(msgBody, document);
        //更新ukey信息    
        }else if(JSSelfCounterConstant.UPDATE_UKEY_INFO.equalsIgnoreCase(transCode)){
            getMsgBody4UpdateUkeyInfo(msgBody, document);
        //重置密码信息
        }else if(JSSelfCounterConstant.RESET_OPERATOR_PASSWORD.equalsIgnoreCase(transCode)){
            getMsgBody4ResetOperatorPassword(msgBody, document);
        //注销操作员
        }else if(JSSelfCounterConstant.CANCEL_OPERATOR.equalsIgnoreCase(transCode)){
            getMsgBody4CancelOperator(msgBody, document);
            
        }else{
            throw new PbException("您输入的交易码"+transCode+"有误!");
        }
        return msgBody;
    }
    /**
     * 注销操作员
     */
    private void getMsgBody4CancelOperator(JSSelfCounterMsgBody msgBody,
            Document document) {
        //签约账号
        String acctNo = document.selectSingleNode("/root/acctNo").getText();
        msgBody.setAccountcode(acctNo);
        //客户号
        String customNo = document.selectSingleNode("/root/customNo").getText();
        msgBody.setCustomno(customNo);
        //经办人（柜员）姓名
        String signName = document.selectSingleNode("/root/signName").getText();
        msgBody.setSignname(signName);
        //经办人（柜员）证件类型
        String signCardType = document.selectSingleNode("/root/signCardType").getText();
        msgBody.setSigncardtype(signCardType);
        //经办人（柜员）证件号码
        String signCardNo = document.selectSingleNode("/root/signCardNo").getText();
        msgBody.setSigncardno(signCardNo);
        //经办人（柜员）电话
        String signTel = document.selectSingleNode("/root/signTel").getText();
        msgBody.setSigntel(signTel);
        //预算单位操作员编码
        String userCode = document.selectSingleNode("/root/userCode").getText();
        msgBody.setUser_code(userCode);
    }
    /**
     * 重置操作员密码    
     */
    private void getMsgBody4ResetOperatorPassword(JSSelfCounterMsgBody msgBody,
            Document document) {
        //签约账号
        String acctNo = document.selectSingleNode("/root/acctNo").getText();
        msgBody.setAccountcode(acctNo);
        //客户号
        String customNo = document.selectSingleNode("/root/customNo").getText();
        msgBody.setCustomno(customNo);
        //经办人（柜员）姓名
        String signName = document.selectSingleNode("/root/signName").getText();
        msgBody.setSignname(signName);
        //经办人（柜员）证件类型
        String signCardType = document.selectSingleNode("/root/signCardType").getText();
        msgBody.setSigncardtype(signCardType);
        //经办人（柜员）证件号码
        String signCardNo = document.selectSingleNode("/root/signCardNo").getText();
        msgBody.setSigncardno(signCardNo);
        //经办人（柜员）电话
        String signTel = document.selectSingleNode("/root/signTel").getText();
        msgBody.setSigntel(signTel);
        //预算单位操作员登录密码  BASE64加密  默认密码base64(123456)
        String userPwd = document.selectSingleNode("/root/userPwd").getText();
        msgBody.setUser_password(userPwd);
        //预算单位操作员编码
        String userCode = document.selectSingleNode("/root/userCode").getText();
        msgBody.setUser_code(userCode);
    }

    /**
     * 更新ukey信息    
     */
    private void getMsgBody4UpdateUkeyInfo(JSSelfCounterMsgBody msgBody, Document document) {
        getMsgBody4CancelOperator(msgBody, document);
        //Ukey编码
        String ukeyCode = document.selectSingleNode("/root/ukeyCode").getText();
        msgBody.setUkey_code(ukeyCode);
    }
    /**
     * 更新操作员
     */
    private void getMsgBody4UpdateOperatorInfo(JSSelfCounterMsgBody msgBody,
            Document document) {
        //签约账号
        String acctNo = document.selectSingleNode("/root/acctNo").getText();
        msgBody.setAccountcode(acctNo);
        //客户号
        String customNo = document.selectSingleNode("/root/customNo").getText();
        msgBody.setCustomno(customNo);
        //预算单位操作员编码
        String userCode = document.selectSingleNode("/root/userCode").getText();
        msgBody.setUser_code(userCode);
        //预算单位操作员姓名
        String userName = document.selectSingleNode("/root/userName").getText();
        msgBody.setUser_name(userName);
        //预算单位操作员证件类型
        String userCardType = document.selectSingleNode("/root/userCardType").getText();
        msgBody.setUser_card_type(userCardType);
        //预算单位操作员证件号码
        String userCardNo = document.selectSingleNode("/root/userCardNo").getText();
        msgBody.setUser_card_no(userCardNo);
        //操作员电话号码
        String operTel = document.selectSingleNode("/root/operTel").getText();
        msgBody.setOperTel(operTel);
        //经办人（柜员）姓名
        String signName = document.selectSingleNode("/root/signName").getText();
        msgBody.setSignname(signName);
        //经办人（柜员）证件类型
        String signCardType = document.selectSingleNode("/root/signCardType").getText();
        msgBody.setSigncardtype(signCardType);
        //经办人（柜员）证件号码
        String signCardNo = document.selectSingleNode("/root/signCardNo").getText();
        msgBody.setAccountcode(signCardNo);
        //经办人（柜员）电话
        String signTel = document.selectSingleNode("/root/signTel").getText();
        msgBody.setSigntel(signTel);
    }
    /**
     * 注销客户
     */
    private void getMsgBody4CancelCustomer(JSSelfCounterMsgBody msgBody, Document document) {
        //签约账号
        String acctNo = document.selectSingleNode("/root/acctNo").getText();
        msgBody.setAccountcode(acctNo);
        //客户号
        String customNo = document.selectSingleNode("/root/customNo").getText();
        msgBody.setCustomno(customNo);
        //经办人（柜员）姓名
        String signName = document.selectSingleNode("/root/signName").getText();
        msgBody.setSignname(signName);
        //经办人（柜员）证件类型
        String signCardType = document.selectSingleNode("/root/signCardType").getText();
        msgBody.setSigncardtype(signCardType);
        //经办人（柜员）证件号码
        String signCardNo = document.selectSingleNode("/root/signCardNo").getText();
        msgBody.setSigncardno(signCardNo);
        //经办人（柜员）电话
        String signTel = document.selectSingleNode("/root/signTel").getText();
        msgBody.setSigntel(signTel);
    }

    /**
     * 修改客户信息
     */
    private void getMsgBody4UpdateCustomerInfo(JSSelfCounterMsgBody msgBody,
            Document document) {
        //签约账号
        String acctNo = document.selectSingleNode("/root/acctNo").getText();
        msgBody.setAccountcode(acctNo);
        //账户名称
        String acctName = document.selectSingleNode("/root/acctName").getText();
        msgBody.setAccountname(acctName);
        //账户开户行编码
        String acctBankCode = document.selectSingleNode("/root/acctBankCode").getText();
        msgBody.setBankcode(acctBankCode);
        //客户号
        String customNo = document.selectSingleNode("/root/customNo").getText();
        msgBody.setCustomno(customNo);
        //客户名称
        String customName = document.selectSingleNode("/root/customName").getText();
        msgBody.setCustomname(customName);
        //所属机构
        String belongOrg = document.selectSingleNode("/root/belongOrg").getText();
        msgBody.setBelongorg(belongOrg);
        //营业执照号码
        String liNo = document.selectSingleNode("/root/liNo").getText();
        msgBody.setLi_no(liNo);
        //企业组织机构代码
        String orgCode = document.selectSingleNode("/root/orgCode").getText();
        msgBody.setOrg_code(orgCode);
        //法人代表名称
        String loaderName = document.selectSingleNode("/root/loaderName").getText();
        msgBody.setLoadername(loaderName);
        //法人证件类型
        String idType = document.selectSingleNode("/root/idType").getText();
        msgBody.setIdtype(idType);
        //法人证件号码
        String idNo = document.selectSingleNode("/root/idNo").getText();
        msgBody.setIdno(idNo);
        //企业联系人
        String contact = document.selectSingleNode("/root/contact").getText();
        msgBody.setContact(contact);
        //企业联系人电话
        String tel = document.selectSingleNode("/root/tel").getText();
        msgBody.setTelephoneno(tel);
        //企业联系人邮箱
        String email = document.selectSingleNode("/root/email").getText();
        msgBody.setEmail(email);
        //企业联系人地址
        String address = document.selectSingleNode("/root/address").getText();
        msgBody.setAddress(address);
        //经办人（柜员）姓名
        String signName = document.selectSingleNode("/root/signName").getText();
        msgBody.setSignname(signName);
        //经办人（柜员）证件类型
        String signCardType = document.selectSingleNode("/root/signCardType").getText();
        msgBody.setSigncardtype(signCardType);
        //经办人（柜员）证件号码
        String signCardNo = document.selectSingleNode("/root/signCardNo").getText();
        msgBody.setSigncardno(signCardNo);
        //经办人（柜员）电话
        String signTel = document.selectSingleNode("/root/signTel").getText();
        msgBody.setSigntel(signTel);
    }

    /**
     * 解析签约接口
     */
    private void getMsgBody4Sign(JSSelfCounterMsgBody msgBody, Document document) {
        getMsgBody4UpdateCustomerInfo(msgBody, document);
        //预算单位操作员编码
        String userCode = document.selectSingleNode("/root/userCode").getText();
        msgBody.setUser_code(userCode);
        //预算单位操作员登录密码（BASE64加密）（默认密码base64(123456)）
        String userPwd = document.selectSingleNode("/root/userPwd").getText();
        msgBody.setUser_password(userPwd);
        //预算单位操作员姓名
        String userName = document.selectSingleNode("/root/userName").getText();
        msgBody.setUser_name(userName);
        //预算单位操作员证件类型
        String userCardType = document.selectSingleNode("/root/userCardType").getText();
        msgBody.setUser_card_type(userCardType);
        //预算单位操作员证件号码
        String userCardNo = document.selectSingleNode("/root/userCardNo").getText();
        msgBody.setUser_card_no(userCardNo);
        //Ukey编码
        String ukeyCode = document.selectSingleNode("/root/ukeyCode").getText();
        msgBody.setUkey_code(ukeyCode);
        //操作员电话号码
        String operTel = document.selectSingleNode("/root/operTel").getText();
        msgBody.setOperTel(operTel);
    }

    /**
     * 业务处理
     * 
     * @param transCode
     * @param body
     */
    private TransResultDTO doBusiness(JSSelfCounterMsgBody msgBody) throws Exception {
        //交易码
        String transCode = msgBody.getMsgHead().getTransCode();
        TransResultDTO resultDto = null;
        // 请求条件信息
        if(JSSelfCounterConstant.SIGN.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.sign(msgBody);
            
        }else if(JSSelfCounterConstant.UPDATE_CUSTOMER_INFO.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.updateCustomerInfo(msgBody);
            
        }else if(JSSelfCounterConstant.CANCEL_CUSTOMER.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.cancelCustomer(msgBody);

        }else if(JSSelfCounterConstant.UPDATE_OPERATOR_INFO.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.updateOperatorInfo(msgBody);

        }else if(JSSelfCounterConstant.UPDATE_UKEY_INFO.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.updateUkeyInfo(msgBody);
            
        }else if(JSSelfCounterConstant.RESET_OPERATOR_PASSWORD.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.resetOperatorPassword(msgBody);

        }else if(JSSelfCounterConstant.CANCEL_OPERATOR.equalsIgnoreCase(transCode)){
            resultDto = jsSelfCounterBusinessServiceImpl.cancelOperator(msgBody);

        }else{
            throw new PbException("请添加方法！");
        }
        

        return resultDto;
    }
    
    /**
     * 生成成功响应报文
     * 
     * @param transCode
     * @param resultDto
     * @param msgBody
     * @return
     * @throws Exception
     */
    private byte[] doResponse(String transCode, TransResultDTO resultDto,
            JSSelfCounterMsgBody msgBody) throws Exception {
        
        String resMsgHead = transCode;//报文头包括6位报文长度+4为交易码
        //开始拼装报文体
        Document document = DocumentHelper.createDocument();
        document.setXMLEncoding(JSSelfCounterConstant.CHAR_SET);
        String resp_code = "";
        if (resultDto.getResStatus() == TransReturnDTO.SUCESS) {
            //成功返回0000
            resp_code = SsConstant.CTJ_SUCCUSS_CODE;
        } else {
            //失败返回0001
            resp_code = SsConstant.CTJ_FAILURE_CODE;
        }
        XmlUtils.createXMLByXPath(document, "/root/resCode",resp_code);//结果码
        XmlUtils.createXMLByXPath(document, "/root/resDes",resultDto.getResMsg());//结果信息
        String resMsgBody = document.asXML();
        //长度放到报文头中
        int length = resMsgHead.getBytes(JSSelfCounterConstant.CHAR_SET).length + 
                resMsgBody.getBytes(JSSelfCounterConstant.CHAR_SET).length;
        resMsgHead = TransUtil.getFixlenStrByAddZero(String.valueOf(length), 6)+resMsgHead;


        return (resMsgHead + resMsgBody).getBytes(JSSelfCounterConstant.CHAR_SET);
    }
    /**
     * 生成失败响应报文
     */
    private byte[] errorResponse(String errorMsg, String transCode) throws UnsupportedEncodingException {
        if(errorMsg == null){
            errorMsg = "交易返回信息为空，请检查柜面日志";
        }

        //开始拼装报文体
        Document document = DocumentHelper.createDocument();
        document.setXMLEncoding(JSSelfCounterConstant.CHAR_SET);
        String resp_code = "";
        
        //失败返回0001
        resp_code = SsConstant.CTJ_FAILURE_CODE; 
        
        XmlUtils.createXMLByXPath(document, "/root/resCode",resp_code);//结果码
        XmlUtils.createXMLByXPath(document, "/root/resDes",errorMsg);//结果信息
        String resMsgBody = document.asXML();
        //长度放到报文头中
        int length = transCode.getBytes(JSSelfCounterConstant.CHAR_SET).length + 
                resMsgBody.getBytes(JSSelfCounterConstant.CHAR_SET).length;
        String resMsgHead = TransUtil.getFixlenStrByAddZero(String.valueOf(length), 6)+transCode;

        return (resMsgHead + resMsgBody).getBytes(JSSelfCounterConstant.CHAR_SET);
    
    }

}