Apache Mina自定义编解码案例

Mina中已经自带的编解码类：

TextLineCodecFactory：基于文本的，根据回车换行来断点传输数据

ProtocolCodecFactory：自定义协议的编解码数据传输

ObjectSerializationCodecFactory：对象序列化传输

DemuxingProtocolCodecFactory：复用传输

自定义通信协议：

FlightSearch 1.0 \n
startcity:BJS \n
endcity:PEK \n
flightway:1 \n
date:2011-08-10 \n

Domain对象

package domain;/** * @function :  * @author   :jy * @company  :万里网 * @date     :2011-8-7 */public class Flight {public String startCity;public String endCity;public String flightway;public String date;public String fromDate;public String subclass1;public String flight1;/** * 返回出发城市 * @return */public String getStartCity() {return startCity;}public void setStartCity(String startCity) {this.startCity = startCity;}/** * 返回到达城市 * @return */public String getEndCity() {return endCity;}public void setEndCity(String endCity) {this.endCity = endCity;}/** * 返回行程类型 * @return */public String getFlightway() {return flightway;}public void setFlightway(String flightway) {this.flightway = flightway;}/** * 返回出发日期 * @return */public String getDate() {return date;}public void setDate(String date) {this.date = date;}@Overridepublic String toString() {return "Flight [startCity=" + startCity + ", endCity=" + endCity + ", flightway=" + flightway + ", date="+ date + "]";}/** * 返回往返日期 * @return */public String getFromDate() {return fromDate;}public void setFromDate(String fromDate) {this.fromDate = fromDate;}public String getFlight1() {return flight1;}public void setFlight1(String flight1) {this.flight1 = flight1;}public String getSubclass1() {return subclass1;}public void setSubclass1(String subclass1) {this.subclass1 = subclass1;}}

服务器端编码

package server;    import java.nio.charset.Charset;  import java.nio.charset.CharsetEncoder;    import org.apache.mina.core.buffer.IoBuffer;  import org.apache.mina.core.session.IoSession;  import org.apache.mina.filter.codec.ProtocolEncoderAdapter;  import org.apache.mina.filter.codec.ProtocolEncoderOutput;    /**  * @function :   * @author   :jy  * @company  :万里网  * @date     :2011-8-7  */  public class FlightEncoder extends ProtocolEncoderAdapter {      private final Charset charset = Charset.forName("UTF-8");      /*       * 服务器端编码无需处理，直接将接收到的数据向下传递      */      @Override      public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {          IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);                    CharsetEncoder ce = charset.newEncoder();                    buf.putString((String)message, ce);                    buf.flip();                    out.write(buf);      }    }

重点是服务器端解码

package server;    import java.nio.charset.Charset;  import java.nio.charset.CharsetDecoder;    import org.apache.mina.core.buffer.IoBuffer;  import org.apache.mina.core.session.IoSession;  import org.apache.mina.filter.codec.CumulativeProtocolDecoder;  import org.apache.mina.filter.codec.ProtocolDecoderAdapter;  import org.apache.mina.filter.codec.ProtocolDecoderOutput;    import domain.Flight;    /**  * @function :   * @author   :jy  * @company  :万里网  * @date     :2011-8-7  */  public class FlightDecoder extends CumulativeProtocolDecoder {        @Override      protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {          IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);          CharsetDecoder cd = Charset.forName("UTF-8").newDecoder();                    int ColumnNumber = 0;          String status="",startCity="",endCity="",flightway="",date="";                    int TextLineNumber = 1;                    Flight flight = new Flight();            /**          * FlightSearch 1.0 \n          * startcity:BJS \n          * endcity:PEK \n          * flightway:1 \n          * date:2011-08-10 \n          */          while(in.hasRemaining()){              byte b = in.get();              buf.put(b);              if(b == 10 && TextLineNumber <= 5){                  ColumnNumber++;                  if(TextLineNumber == 1){                      buf.flip();                      status = buf.getString(ColumnNumber, cd);                  }                                    if(TextLineNumber == 2){                      buf.flip();                      startCity = buf.getString(ColumnNumber, cd).split(":")[1];                      startCity = startCity.substring(0, startCity.length()-1);                      flight.setStartCity(startCity);                  }                                    if(TextLineNumber == 3){                      buf.flip();                      endCity = buf.getString(ColumnNumber, cd).split(":")[1];                      endCity = endCity.substring(0, endCity.length()-1);                      flight.setEndCity(endCity);                  }                                    if(TextLineNumber == 4){                      buf.flip();                      flightway = buf.getString(ColumnNumber, cd).split(":")[1];                      flightway = flightway.substring(0, flightway.length()-1);                      flight.setFlightway(flightway);                  }                                    if(TextLineNumber == 5){                      buf.flip();                      date = buf.getString(ColumnNumber, cd).split(":")[1];                      date = date.substring(0, date.length()-1);                      flight.setDate(date);                      break;                  }                                    ColumnNumber = 0;                  buf.clear();                  TextLineNumber++;              }else{                  ColumnNumber++;              }          }          out.write(flight);          return false;      }    } 

服务器端编解码工厂

package server;    import org.apache.mina.core.session.IoSession;  import org.apache.mina.filter.codec.ProtocolCodecFactory;  import org.apache.mina.filter.codec.ProtocolDecoder;  import org.apache.mina.filter.codec.ProtocolEncoder;    /**  * @function :   * @author   :jy  * @company  :万里网  * @date     :2011-8-7  */  public class FlightCodecFactory implements ProtocolCodecFactory {      private final ProtocolEncoder encoder = new FlightEncoder();      private final ProtocolDecoder decoder = new FlightDecoder();        @Override      public ProtocolDecoder getDecoder(IoSession session) throws Exception {          return decoder;      }        @Override      public ProtocolEncoder getEncoder(IoSession session) throws Exception {          return encoder;      }    } 

下面是客户端的编解码

重点是编码，需要将数据组装成协议格式，发送给服务器

package client;    import java.nio.charset.Charset;  import java.nio.charset.CharsetEncoder;    import org.apache.mina.core.buffer.IoBuffer;  import org.apache.mina.core.session.IoSession;  import org.apache.mina.filter.codec.ProtocolEncoderAdapter;  import org.apache.mina.filter.codec.ProtocolEncoderOutput;    import domain.Flight;      /**  * @function :   * @author   :jy  * @company  :万里网  * @date     :2011-8-7  */  public class FlightClientEncoder extends ProtocolEncoderAdapter {      private final Charset charset;            public FlightClientEncoder(){          this.charset = Charset.forName("UTF-8");      }        @Override      public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {          Flight flight = (Flight)message;                    IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);                    CharsetEncoder ce = charset.newEncoder();                    buf.putString("Flight Search 1.0" + '\n', ce);                    buf.putString("startcty:" + flight.getStartCity() + '\n', ce);                    buf.putString("endcity:" + flight.getEndCity() + '\n', ce);                    buf.putString("flightway:" + flight.getFlightway() + '\n', ce);                    buf.putString("date:" + flight.getDate() + '\n', ce);                    buf.flip();                    out.write(buf);      }    } 

解码无需特殊处理，接收完数据直接向下传递

package client;    import java.nio.charset.Charset;  import java.nio.charset.CharsetDecoder;    import org.apache.mina.core.buffer.IoBuffer;  import org.apache.mina.core.session.IoSession;  import org.apache.mina.filter.codec.CumulativeProtocolDecoder;  import org.apache.mina.filter.codec.ProtocolDecoderOutput;    /**  * @function :   * @author   :jy  * @company  :万里网  * @date     :2011-8-7  */  public class FlightClientDecoder extends CumulativeProtocolDecoder {        /* (non-Javadoc)      * @see org.apache.mina.filter.codec.ProtocolDecoder#decode(org.apache.mina.core.session.IoSession, org.apache.mina.core.buffer.IoBuffer, org.apache.mina.filter.codec.ProtocolDecoderOutput)      */      @Override      protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {          CharsetDecoder cd = Charset.forName("UTF-8").newDecoder();          IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);                    while(in.hasRemaining()){              buf.put(in.get());          }          buf.flip();          out.write(buf.getString(cd));          return false;      }    } 

客户端编解码工厂

package client;    import org.apache.mina.core.session.IoSession;  import org.apache.mina.filter.codec.ProtocolCodecFactory;  import org.apache.mina.filter.codec.ProtocolDecoder;  import org.apache.mina.filter.codec.ProtocolEncoder;    /**  * @function :   * @author   :jy  * @company  :万里网  * @date     :2011-8-7  */  public class FlightClientCodecFactory implements ProtocolCodecFactory {      private final ProtocolEncoder encoder = new FlightClientEncoder();      private final ProtocolDecoder decoder = new FlightClientDecoder();            /* (non-Javadoc)      * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getDecoder(org.apache.mina.core.session.IoSession)      */      @Override      public ProtocolDecoder getDecoder(IoSession arg0) throws Exception {          return decoder;      }        /* (non-Javadoc)      * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getEncoder(org.apache.mina.core.session.IoSession)      */      @Override      public ProtocolEncoder getEncoder(IoSession arg0) throws Exception {          return encoder;      }    }  

转载地址：http://blog.csdn.net/a600423444/article/details/6671035