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

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1. package domain;  
2.   
3. /** 
4.  * @function :  
5.  * @author   :jy 
6.  * @company  :万里网 
7.  * @date     :2011-8-7 
8.  */  
9. public class Flight {  
10.     public String startCity;  
11.     public String endCity;  
12.     public String flightway;  
13.     public String date;  
14.     public String fromDate;  
15.     public String subclass1;  
16.     public String flight1;  
17.       
18.     /** 
19.      * 返回出发城市 
20.      * @return 
21.      */  
22.     public String getStartCity() {  
23.         return startCity;  
24.     }  
25.     public void setStartCity(String startCity) {  
26.         this.startCity = startCity;  
27.     }  
28.     /** 
29.      * 返回到达城市 
30.      * @return 
31.      */  
32.     public String getEndCity() {  
33.         return endCity;  
34.     }  
35.     public void setEndCity(String endCity) {  
36.         this.endCity = endCity;  
37.     }  
38.     /** 
39.      * 返回行程类型 
40.      * @return 
41.      */  
42.     public String getFlightway() {  
43.         return flightway;  
44.     }  
45.     public void setFlightway(String flightway) {  
46.         this.flightway = flightway;  
47.     }  
48.     /** 
49.      * 返回出发日期 
50.      * @return 
51.      */  
52.     public String getDate() {  
53.         return date;  
54.     }  
55.     public void setDate(String date) {  
56.         this.date = date;  
57.     }  
58.     @Override  
59.     public String toString() {  
60.         return "Flight [startCity=" + startCity + ", endCity=" + endCity + ", flightway=" + flightway + ", date="  
61.                 + date + "]";  
62.     }  
63.     /** 
64.      * 返回往返日期 
65.      * @return 
66.      */  
67.     public String getFromDate() {  
68.         return fromDate;  
69.     }  
70.     public void setFromDate(String fromDate) {  
71.         this.fromDate = fromDate;  
72.     }  
73.     public String getFlight1() {  
74.         return flight1;  
75.     }  
76.     public void setFlight1(String flight1) {  
77.         this.flight1 = flight1;  
78.     }  
79.     public String getSubclass1() {  
80.         return subclass1;  
81.     }  
82.     public void setSubclass1(String subclass1) {  
83.         this.subclass1 = subclass1;  
84.     }  
85. }  

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

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1. package server;  
2.   
3. import java.nio.charset.Charset;  
4. import java.nio.charset.CharsetEncoder;  
5.   
6. import org.apache.mina.core.buffer.IoBuffer;  
7. import org.apache.mina.core.session.IoSession;  
8. import org.apache.mina.filter.codec.ProtocolEncoderAdapter;  
9. import org.apache.mina.filter.codec.ProtocolEncoderOutput;  
10.   
11. /** 
12.  * @function :  
13.  * @author   :jy 
14.  * @company  :万里网 
15.  * @date     :2011-8-7 
16.  */  
17. public class FlightEncoder extends ProtocolEncoderAdapter {  
18.     private final Charset charset = Charset.forName("UTF-8");  
19.     /*  
20.      * 服务器端编码无需处理，直接将接收到的数据向下传递 
21.      */  
22.     @Override  
23.     public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {  
24.         IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);  
25.           
26.         CharsetEncoder ce = charset.newEncoder();  
27.           
28.         buf.putString((String)message, ce);  
29.           
30.         buf.flip();  
31.           
32.         out.write(buf);  
33.     }  
34.   
35. }  

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 */@Overridepublic 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

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1. package server;  
2.   
3. import java.nio.charset.Charset;  
4. import java.nio.charset.CharsetDecoder;  
5.   
6. import org.apache.mina.core.buffer.IoBuffer;  
7. import org.apache.mina.core.session.IoSession;  
8. import org.apache.mina.filter.codec.CumulativeProtocolDecoder;  
9. import org.apache.mina.filter.codec.ProtocolDecoderAdapter;  
10. import org.apache.mina.filter.codec.ProtocolDecoderOutput;  
11.   
12. import domain.Flight;  
13.   
14. /** 
15.  * @function :  
16.  * @author   :jy 
17.  * @company  :万里网 
18.  * @date     :2011-8-7 
19.  */  
20. public class FlightDecoder extends CumulativeProtocolDecoder {  
21.   
22.     @Override  
23.     protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {  
24.         IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);  
25.         CharsetDecoder cd = Charset.forName("UTF-8").newDecoder();  
26.           
27.         int ColumnNumber = 0;  
28.         String status="",startCity="",endCity="",flightway="",date="";  
29.           
30.         int TextLineNumber = 1;  
31.           
32.         Flight flight = new Flight();  
33.   
34.         /** 
35.          * FlightSearch 1.0 \n 
36.          * startcity:BJS \n 
37.          * endcity:PEK \n 
38.          * flightway:1 \n 
39.          * date:2011-08-10 \n 
40.          */  
41.         while(in.hasRemaining()){  
42.             byte b = in.get();  
43.             buf.put(b);  
44.             if(b == 10 && TextLineNumber <= 5){  
45.                 ColumnNumber++;  
46.                 if(TextLineNumber == 1){  
47.                     buf.flip();  
48.                     status = buf.getString(ColumnNumber, cd);  
49.                 }  
50.                   
51.                 if(TextLineNumber == 2){  
52.                     buf.flip();  
53.                     startCity = buf.getString(ColumnNumber, cd).split(":")[1];  
54.                     startCity = startCity.substring(0, startCity.length()-1);  
55.                     flight.setStartCity(startCity);  
56.                 }  
57.                   
58.                 if(TextLineNumber == 3){  
59.                     buf.flip();  
60.                     endCity = buf.getString(ColumnNumber, cd).split(":")[1];  
61.                     endCity = endCity.substring(0, endCity.length()-1);  
62.                     flight.setEndCity(endCity);  
63.                 }  
64.                   
65.                 if(TextLineNumber == 4){  
66.                     buf.flip();  
67.                     flightway = buf.getString(ColumnNumber, cd).split(":")[1];  
68.                     flightway = flightway.substring(0, flightway.length()-1);  
69.                     flight.setFlightway(flightway);  
70.                 }  
71.                   
72.                 if(TextLineNumber == 5){  
73.                     buf.flip();  
74.                     date = buf.getString(ColumnNumber, cd).split(":")[1];  
75.                     date = date.substring(0, date.length()-1);  
76.                     flight.setDate(date);  
77.                     break;  
78.                 }  
79.                   
80.                 ColumnNumber = 0;  
81.                 buf.clear();  
82.                 TextLineNumber++;  
83.             }else{  
84.                 ColumnNumber++;  
85.             }  
86.         }  
87.         out.write(flight);  
88.         return false;  
89.     }  
90.   
91. }  

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 {@Overrideprotected 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

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1. package server;  
2.   
3. import org.apache.mina.core.session.IoSession;  
4. import org.apache.mina.filter.codec.ProtocolCodecFactory;  
5. import org.apache.mina.filter.codec.ProtocolDecoder;  
6. import org.apache.mina.filter.codec.ProtocolEncoder;  
7.   
8. /** 
9.  * @function :  
10.  * @author   :jy 
11.  * @company  :万里网 
12.  * @date     :2011-8-7 
13.  */  
14. public class FlightCodecFactory implements ProtocolCodecFactory {  
15.     private final ProtocolEncoder encoder = new FlightEncoder();  
16.     private final ProtocolDecoder decoder = new FlightDecoder();  
17.   
18.     @Override  
19.     public ProtocolDecoder getDecoder(IoSession session) throws Exception {  
20.         return decoder;  
21.     }  
22.   
23.     @Override  
24.     public ProtocolEncoder getEncoder(IoSession session) throws Exception {  
25.         return encoder;  
26.     }  
27.   
28. }  

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();@Overridepublic ProtocolDecoder getDecoder(IoSession session) throws Exception {return decoder;}@Overridepublic 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

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1. package client;  
2.   
3. import java.nio.charset.Charset;  
4. import java.nio.charset.CharsetEncoder;  
5.   
6. import org.apache.mina.core.buffer.IoBuffer;  
7. import org.apache.mina.core.session.IoSession;  
8. import org.apache.mina.filter.codec.ProtocolEncoderAdapter;  
9. import org.apache.mina.filter.codec.ProtocolEncoderOutput;  
10.   
11. import domain.Flight;  
12.   
13.   
14. /** 
15.  * @function :  
16.  * @author   :jy 
17.  * @company  :万里网 
18.  * @date     :2011-8-7 
19.  */  
20. public class FlightClientEncoder extends ProtocolEncoderAdapter {  
21.     private final Charset charset;  
22.       
23.     public FlightClientEncoder(){  
24.         this.charset = Charset.forName("UTF-8");  
25.     }  
26.   
27.     @Override  
28.     public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {  
29.         Flight flight = (Flight)message;  
30.           
31.         IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);  
32.           
33.         CharsetEncoder ce = charset.newEncoder();  
34.           
35.         buf.putString("Flight Search 1.0" + '\n', ce);  
36.           
37.         buf.putString("startcty:" + flight.getStartCity() + '\n', ce);  
38.           
39.         buf.putString("endcity:" + flight.getEndCity() + '\n', ce);  
40.           
41.         buf.putString("flightway:" + flight.getFlightway() + '\n', ce);  
42.           
43.         buf.putString("date:" + flight.getDate() + '\n', ce);  
44.           
45.         buf.flip();  
46.           
47.         out.write(buf);  
48.     }  
49.   
50. }  

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");}@Overridepublic 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

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1. package client;  
2.   
3. import java.nio.charset.Charset;  
4. import java.nio.charset.CharsetDecoder;  
5.   
6. import org.apache.mina.core.buffer.IoBuffer;  
7. import org.apache.mina.core.session.IoSession;  
8. import org.apache.mina.filter.codec.CumulativeProtocolDecoder;  
9. import org.apache.mina.filter.codec.ProtocolDecoderOutput;  
10.   
11. /** 
12.  * @function :  
13.  * @author   :jy 
14.  * @company  :万里网 
15.  * @date     :2011-8-7 
16.  */  
17. public class FlightClientDecoder extends CumulativeProtocolDecoder {  
18.   
19.     /* (non-Javadoc) 
20.      * @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) 
21.      */  
22.     @Override  
23.     protected boolean doDecode(IoSession session, IoBuffer in, ProtocolDecoderOutput out) throws Exception {  
24.         CharsetDecoder cd = Charset.forName("UTF-8").newDecoder();  
25.         IoBuffer buf = IoBuffer.allocate(100).setAutoExpand(true);  
26.           
27.         while(in.hasRemaining()){  
28.             buf.put(in.get());  
29.         }  
30.         buf.flip();  
31.         out.write(buf.getString(cd));  
32.         return false;  
33.     }  
34.   
35. }  

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) */@Overrideprotected 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

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1. package client;  
2.   
3. import org.apache.mina.core.session.IoSession;  
4. import org.apache.mina.filter.codec.ProtocolCodecFactory;  
5. import org.apache.mina.filter.codec.ProtocolDecoder;  
6. import org.apache.mina.filter.codec.ProtocolEncoder;  
7.   
8. /** 
9.  * @function :  
10.  * @author   :jy 
11.  * @company  :万里网 
12.  * @date     :2011-8-7 
13.  */  
14. public class FlightClientCodecFactory implements ProtocolCodecFactory {  
15.     private final ProtocolEncoder encoder = new FlightClientEncoder();  
16.     private final ProtocolDecoder decoder = new FlightClientDecoder();  
17.       
18.     /* (non-Javadoc) 
19.      * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getDecoder(org.apache.mina.core.session.IoSession) 
20.      */  
21.     @Override  
22.     public ProtocolDecoder getDecoder(IoSession arg0) throws Exception {  
23.         return decoder;  
24.     }  
25.   
26.     /* (non-Javadoc) 
27.      * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getEncoder(org.apache.mina.core.session.IoSession) 
28.      */  
29.     @Override  
30.     public ProtocolEncoder getEncoder(IoSession arg0) throws Exception {  
31.         return encoder;  
32.     }  
33.   
34. }  

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) */@Overridepublic ProtocolDecoder getDecoder(IoSession arg0) throws Exception {return decoder;}/* (non-Javadoc) * @see org.apache.mina.filter.codec.ProtocolCodecFactory#getEncoder(org.apache.mina.core.session.IoSession) */@Overridepublic ProtocolEncoder getEncoder(IoSession arg0) throws Exception {return encoder;}}

 

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