Apache MINA (2) Hello World!

了解完Apach MINA的一些基本概念Apache MINA (1) 简介

，开始进入MINA相关的代码学习，以一个简单HelloWorld程序开始，完成客户端与服务端之间的通讯。

准备工作：

org.apache.mina 版本4.0

org.slf4j 1.6.1 （Simple Logging Facade for Java）mina所使用的日志框架，该版本是与mina4.0匹配的版本。

我是用maven管理项目依赖的，使用apache-maven-3.0.4

IDE：IntelliJ IDEA 10.0.3

开始HelloWorld：

1.maven的pom文件：

1.

2.

3. xmlns:xsi=“https://www.360docs.net/doc/c315921038.html,/2001/XMLSchema-instance”

4. xsi:schemaLocation=“https://www.360docs.net/doc/c315921038.html,/POM/4.0.0 http://maven.a

https://www.360docs.net/doc/c315921038.html,/xsd/maven-4.0.0.xsd”>

5. 4.0.0

6.

7. example

8. example

9. 1.0

10.

11.

12. GBK

13.

14.

15.

16.

17. org.apache.mina

18. mina-core

19. 2.0.4

20.

21.

22.

23. org.slf4j

24. jcl-over-slf4j

25. 1.6.1

26.

27.

28.

29. org.slf4j

30. slf4j-nop

31. 1.6.1

32.

33.

34.

35.

36.

2. 服务器代码：

a) 首先实现服务端的IoHandler代码SimpleMinaServerHandler。主要功能是打印客户端写入的信息，统计客户端的请求次数以及返回当前客户端是第几次访问。

1.package com.chiyan.apach.mina.server;

2.

3.import org.apache.mina.core.service.IoHandlerAdapter;

4.import org.apache.mina.core.session.IoSession;

5.

6.import java.util.concurrent.atomic.AtomicInteger;

7.

8./**

9. * Created by IntelliJ IDEA.

10. * 简单的消息处理器

11. * User: chiyan

12. * Date: 12-7-19

13. * Time: 上午12:19

14. */

15.public class SimpleMinaServerHandler extends IoHandlerAdapter {

16.

17.private AtomicInteger count = new AtomicInteger(0);

18.

19./**

20. * 当一个客户端连接进入时

21. */

22. @Override

23.public void sessionOpened(IoSession session) throws Exception {

24.

25. System.out.println(“client connection : ” + session.getRemoteAddress(

));

26.

27. }

28.

29./**

30. * 当一个客户端关闭时

31. */

32. @Override

33.public void sessionClosed(IoSession session) throws Exception {

34.

35. System.out.println(“client disconnection : ” +session.getRemoteAddres

s() + “ is Disconnection”);

36.

37. }

38.

39./**

40. * 当接收到客户端的信息

41. *

42. * @param session

43. * @param message

44. * @throws Exception

45. */

46. @Override

47.public void messageReceived(IoSession session, Object message)

48.throws Exception {

49.

50. String str = (String)message;

51.

52.// 打印客户端

53. System.out.println(“receive client message : [ " + str +" ]“);

54.

55.// 回写消息给客户端

56. session.write(count.incrementAndGet());

57.

58. }

59.

60.}

b) 搭建服务端MainServer：

1.package com.chiyan.apach.mina.server;

2.

3.import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;

4.import org.apache.mina.core.session.IdleStatus;

5.import org.apache.mina.filter.codec.ProtocolCodecFilter;

6.import org.apache.mina.filter.codec.textline.TextLineCodecFactory;

7.import org.apache.mina.transport.socket.SocketAcceptor;

8.import org.apache.mina.transport.socket.SocketSessionConfig;

9.import org.apache.mina.transport.socket.nio.NioSocketAcceptor;

10.

11.import java.io.IOException;

12.import https://www.360docs.net/doc/c315921038.html,.InetSocketAddress;

13.

14./**

15. * Created by IntelliJ IDEA.

16. * User: chiyan

17. * Date: 12-7-19

18. * Time: 上午12:27

19. */

20.public class MainServer {

21.

22.// 服务器端口

23.private static final int SERVER_PORT = 8899;

24.

25.public static void main(String[] args) throws Exception {

26.

27.//创建一个非阻塞的Server端Socket，用NIO

28. SocketAcceptor acceptor = new NioSocketAcceptor();

29.

30.// 定义每次接收数据大小

31. SocketSessionConfig sessionConfig = acceptor.getSessionConfig();

32. sessionConfig.setReadBufferSize(2048);

33.

34.//创建接受数据的过滤器

35. DefaultIoFilterChainBuilder chain = acceptor.getFilterChain();

36.

37.//设定这个过滤器将一行一行（/r/n）的读取数据

38. chain.addLast(“myChain”, new ProtocolCodecFilter(new TextLineCodecFac

tory()));

39.

40.//设定服务器端的消息处理器: 一个 SimpleMinaServerHandler 对象

41. acceptor.setHandler(new SimpleMinaServerHandler());

42.

43.//绑定端口，启动服务器

44.try {

45. acceptor.bind(new InetSocketAddress(SERVER_PORT));

46. } catch (IOException e) {

47. e.printStackTrace();

48. }

49. System.out.println(“Mina server is listing port:” + SERVER_PORT);

50.

51. }

52.

53.}

3. 客户端代码

a)首先实现客户端的IoHandler代码SimpleMinaClientHandler。主要功能是向服务端写消息，接收到服务端计数后再回写服务端。

1.package com.chiyan.apach.mina.client;

2.

3.import org.apache.mina.core.service.IoHandlerAdapter;

4.import org.apache.mina.core.session.IdleStatus;

5.import org.apache.mina.core.session.IoSession;

6.

7./**

8. * Created by IntelliJ IDEA.

9. * User: chiyan

10. * Date: 12-7-19

11. * Time: 上午12:31

12. */

13.public class SimpleMinaClientHandler extends IoHandlerAdapter {

14.

15./**

16. * 当客户端接受到消息时

17. */

18. @Override

19.public void messageReceived(IoSession session, Object message) throws Exc

eption {

20.

21. Integer num = Integer.valueOf((String)message);

22.

23.if(num == null || num >10){

24. session.close(true);

25.return;

26. }

27.

28. System.out.println(“receive server num : [ " + num + " ]“);

29.

30. Thread.sleep(1000);

31.

32. session.write(“client received num is : ” + num + “, request next num

”);

33.

34. }

35.

36./**

37. * 当一个客户端被关闭时

38. */

39. @Override

40.public void sessionClosed(IoSession session) throws Exception {

41. System.out.println(“client disconnect”);

42. }

43.

44./**

45. * 当一个客户端连接进入时

46. */

47. @Override

48.public void sessionOpened(IoSession session) throws Exception {

49.

50. System.out.println(“create connection to server :” + session.getRemot

eAddress());

51. session.write(“client started”);

52. session.write(“Hello World!”);

53. }

54.

55.}

b)搭建客户端MainClient

1.package com.chiyan.apach.mina.client;

2.

3.import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;

4.import org.apache.mina.core.future.ConnectFuture;

5.import org.apache.mina.filter.codec.ProtocolCodecFilter;

6.import org.apache.mina.filter.codec.textline.TextLineCodecFactory;

7.import org.apache.mina.transport.socket.nio.NioSocketConnector;

8.

9.import https://www.360docs.net/doc/c315921038.html,.InetSocketAddress;

10.

11./**

12. * Created by IntelliJ IDEA.

13. * User: chiyan

14. * Date: 12-7-19

15. * Time: 上午12:40

16. */

17.public class MainClient {

18.

19./**

20. * 服务器ip

21. */

22.private static final String SERVER_IP=“127.0.0.1″;

23.

24./**

25. * 服务器端口

26. */

27.private static final int SERVER_PORT=8899;

28.

29.public static void main(String []args){

30.

31.//Create TCP/IP connection

32. NioSocketConnector connector = new NioSocketConnector();

33.

34.//创建接受数据的过滤器

35. DefaultIoFilterChainBuilder chain = connector.getFilterChain();

36.

37.//设定这个过滤器将一行一行(/r/n)的读取数据

38. chain.addLast(“myChain”, new ProtocolCodecFilter(new TextLineCodecFac

tory()));

39.

40.//服务器的消息处理器：一个 SimpleMinaClientHandler 对象

41. connector.setHandler(new SimpleMinaClientHandler());

42.

43.//set connect timeout

44. connector.setConnectTimeoutMillis(30 * 1000);

45.

46.//连接到服务器：

47. ConnectFuture cf = connector.connect(new InetSocketAddress(SERVER_IP,

SERVER_PORT));

48.

49. cf.awaitUninterruptibly();

50.

51. cf.getSession().getCloseFuture().awaitUninterruptibly();

52.

53. connector.dispose();

54. }

55.}

运行程序：

1.服务端打印：

1.Mina server is listing port:8899

2.client connection : /127.0.0.1:50497

3.receive client message : [ client started ]

4.receive client message : [ Hello World! ]

5.receive client message : [ client received num is : 1, request next num ]

6.receive client message : [ client received num is : 2, request next num ]

7.receive client message : [ client received num is : 3, request next num ]

8.receive client message : [ client received num is : 4, request next num ]

9.receive client message : [ client received num is : 5, request next num ]

10.receive client message : [ client received num is : 6, request next num ]

11.receive client message : [ client received num is : 7, request next num ]

12.receive client message : [ client received num is : 8, request next num ]

13.receive client message : [ client received num is : 9, request next num ]

14.receive client message : [ client received num is : 10, request next num ]

15.client disconnection : /127.0.0.1:50497 is Disconnection

2.客户端打印：

1.create connection to server :/127.0.0.1:8899

2.receive server num : [ 1 ]

3.receive server num : [ 2 ]

4.receive server num : [ 3 ]

5.receive server num : [ 4 ]

6.receive server num : [ 5 ]

7.receive server num : [ 6 ]

8.receive server num : [ 7 ]

9.receive server num : [ 8 ]

10.receive server num : [ 9 ]

11.receive server num : [ 10 ]

12.client disconnect