Mina入门教程（二）----Spring4 集成Mina

在spring和mina集成的时候，要十分注意一个问题：版本。

这是一个非常严重的问题，mina官网的demo没错，网上很多网友总结的代码也是对的，但是很多人将mina集成到spring中的时候，总是会发现有个问题：

java.lang.IllegalArgumentException: Cannot convert value of type [org.apache.mina.integration.beans.InetSocketAddressEditor] to required type [java.lang.Class] for property 'customEditors[java.net.SocketAddress]': PropertyEditor .....

类型不匹配。估计很多人按照网上的demo来做的话，都会遇到这个错误（除非spring是用的2.5或者之前的版本）。这是因为新版的spring有改动：

将一个PropertyEditor 实例传入CustomEditorConfigurer 已经被废除了

所以很多人会遇到这个错误。笔者也是查了N久资料，发现某位学php的牛人解决了该问题。是对spring的配置文件做一点修改：
将原来的：

<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">    <property name="customEditors">        <map>            <entry key="java.net.SocketAddress">                <bean class="org.apache.mina.integration.beans.InetSocketAddressEditor" />            </entry>        </map>    </property></bean>

改成：

    <bean        class="org.springframework.beans.factory.config.CustomEditorConfigurer">        <property name="customEditors">            <map>　　　　　　　　　<!-- 修改这里 -->                <entry key="java.net.SocketAddress" value="org.apache.mina.integration.beans.InetSocketAddressEditor" >                </entry>            </map>        </property>    </bean>

这样，这个问题就解决了。想想原本的项目中，用的spring+mina没出现问题，真是个侥幸。。。

好了，下面把整合的写一下。

首先是用到的包，这里使用maven，pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>mymina</groupId>  <artifactId>MyMina</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>jar</packaging>  <name>MyMina</name>  <url>http://maven.apache.org</url>  <properties>    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  </properties><build>    <plugins>    <plugin>    <groupId>org.apache.felix</groupId>    <artifactId>maven-bundle-plugin</artifactId>    <extensions>true</extensions></plugin>    </plugins></build>  <dependencies><dependency>    <groupId>org.slf4j</groupId>    <artifactId>slf4j-jdk14</artifactId>    <version>1.7.7</version></dependency>  <dependency>    <groupId>org.apache.mina</groupId>    <artifactId>mina-integration-beans</artifactId>    <version>2.0.7</version></dependency>  <dependency>    <groupId>org.springframework</groupId>    <artifactId>spring-beans</artifactId>    <version>4.0.6.RELEASE</version></dependency>      <dependency>        <groupId>org.apache.mina</groupId>            <artifactId>mina-core</artifactId>            <version>2.0.4</version>             <type>bundle</type>             <scope>compile</scope>    </dependency>    <dependency>    <groupId>org.apache.mina</groupId>    <artifactId>mina-integration-spring</artifactId>    <version>1.1.7</version>    </dependency>    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <version>3.8.1</version>      <scope>test</scope>    </dependency>        <dependency>        <groupId>org.springframework</groupId>        <artifactId>spring-context</artifactId>        <version>4.0.6.RELEASE</version>    </dependency>        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>1.3.0</version>        </dependency>  </dependencies></project>

这里面有几个配置是比较讲究的，包括那个plugin和mina-core中的配置，配置有点差别，会报一个bundle的错误。
因为用maven，会方便很多，找包的时候，知道依赖就可以了。这里有个网站，可以查找自己需要的依赖包：http://mvnrepository.com/ ，这个网站很不错，类似以前的findjar.com。

然后是spring整合的配置：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">    <bean        class="org.springframework.beans.factory.config.CustomEditorConfigurer">        <property name="customEditors">            <map>                <entry key="java.net.SocketAddress" value="org.apache.mina.integration.beans.InetSocketAddressEditor" >                </entry>            </map>        </property>    </bean>    <bean id="ioAcceptor"        class="org.apache.mina.transport.socket.nio.NioSocketAcceptor"        init-method="bind" destroy-method="unbind">        <property name="defaultLocalAddress" value=":8888" />        <property name="handler" ref="SampleHandler" />        <property name="filterChainBuilder" ref="filterChainBuilder" />        <property name="reuseAddress" value="true" />    </bean>    <bean id="executorFilter"        class="org.apache.mina.filter.executor.ExecutorFilter" />    <bean id="mdcInjectionFilter"        class="org.apache.mina.filter.logging.MdcInjectionFilter">        <constructor-arg value="remoteAddress" />    </bean>    <bean id="codecFilter"        class="org.apache.mina.filter.codec.ProtocolCodecFilter">        <constructor-arg>        <!--              <bean                class="org.apache.mina.filter.codec.textline.TextLineCodecFactory" />                -->                <bean class="cn.org.handler.MyCodeFactory"></bean>        </constructor-arg>    </bean>    <bean id="loggingFilter"        class="org.apache.mina.filter.logging.LoggingFilter" />    <bean id="SampleHandler" class="cn.org.handler.HandlerTwo" />    <!--boss server  -->    <bean id="bossSampleHandler" class="cn.org.handler.HandlerOne" />    <bean id="filterChainBuilder"        class="org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder">        <property name="filters">            <map>                <entry key="executor" value-ref="executorFilter" />                <entry key="mdcInjectionFilter"                    value-ref="mdcInjectionFilter" />                <entry key="codecFilter" value-ref="codecFilter" />                <entry key="loggingFilter" value-ref="loggingFilter" />            </map>        </property>    </bean></beans>

这里需要注意的问题，前面已经有写。
再者就是服务端和客户端的代码编写，服务端已经和spring整合了，里面配置了服务端的handler，所以这里主要是服务端的handler：

package cn.org.handler;import org.apache.mina.core.service.IoHandlerAdapter;import org.apache.mina.core.session.IdleStatus;import org.apache.mina.core.session.IoSession;public class HandlerTwo extends IoHandlerAdapter {    @Override    public void messageReceived(IoSession session, Object message)            throws Exception {        // TODO Auto-generated method stub    //    super.messageReceived(session, message);        System.out.println("received message :"+message);    }    @Override    public void sessionClosed(IoSession session) throws Exception {        // TODO Auto-generated method stub        super.sessionClosed(session);    }    @Override    public void sessionIdle(IoSession session, IdleStatus status)            throws Exception {        // TODO Auto-generated method stub        super.sessionIdle(session, status);    }}

写一个启动入口：

package cn.org.test;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Test {    /**     * @param args     */    public static void main(String[] args) {        ClassPathXmlApplicationContext ct =    new ClassPathXmlApplicationContext("applicationContext-mina.xml");    }}

还缺少一个服务端的编码过滤器：

package cn.org.handler;import java.nio.charset.Charset;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;import org.apache.mina.filter.codec.textline.LineDelimiter;import org.apache.mina.filter.codec.textline.TextLineDecoder;import org.apache.mina.filter.codec.textline.TextLineEncoder;public  class MyCodeFactory implements ProtocolCodecFactory {        private final TextLineEncoder encoder;        private final TextLineDecoder decoder;        /*final static char endchar = 0x1a;*/        final static char endchar = 0x0d;        public MyCodeFactory() {            this(Charset.forName("gb2312"));        }        public MyCodeFactory(Charset charset) {             encoder = new TextLineEncoder(charset, LineDelimiter.UNIX);                decoder = new TextLineDecoder(charset, LineDelimiter.AUTO);                }        public ProtocolDecoder getDecoder(IoSession session) throws Exception {            // TODO Auto-generated method stub            return decoder;        }        public ProtocolEncoder getEncoder(IoSession session) throws Exception {            // TODO Auto-generated method stub            return encoder;        }        public int getEncoderMaxLineLength() {            return encoder.getMaxLineLength();        }        public void setEncoderMaxLineLength(int maxLineLength) {            encoder.setMaxLineLength(maxLineLength);        }        public int getDecoderMaxLineLength() {            return decoder.getMaxLineLength();        }        public void setDecoderMaxLineLength(int maxLineLength) {            decoder.setMaxLineLength(maxLineLength);        }}

这样，运行入口程序，服务端就启动了。除了入口，在spring中都有配置，包括端口这些。

然后写一个客户端：

客户端的handler：

package cn.org.handler;import org.apache.mina.core.service.IoHandlerAdapter;import org.apache.mina.core.session.IdleStatus;import org.apache.mina.core.session.IoSession;public class HandlerOne extends IoHandlerAdapter {    @Override    public void messageReceived(IoSession session, Object message)            throws Exception {        // TODO Auto-generated method stub        //super.messageReceived(session, message);        System.out.println("message :"+message);    }    @Override    public void sessionClosed(IoSession session) throws Exception {        // TODO Auto-generated method stub        super.sessionClosed(session);    }    @Override    public void sessionIdle(IoSession session, IdleStatus status)            throws Exception {        // TODO Auto-generated method stub        super.sessionIdle(session, status);    }    @Override    public void messageSent(IoSession session, Object message) throws Exception {         System.out.println("发送的消息是："+message.toString());                //super.messageSent(session, message);    }    @Override    public void sessionCreated(IoSession session) throws Exception {                super.sessionCreated(session);    }    @Override    public void sessionOpened(IoSession session) throws Exception {        super.sessionOpened(session);    }      }

客户端的入口:

package cn.org.test;import java.net.InetSocketAddress;import java.nio.charset.Charset;import org.apache.mina.core.future.ConnectFuture;import org.apache.mina.filter.codec.ProtocolCodecFilter;import org.apache.mina.filter.codec.textline.TextLineCodecFactory;import org.apache.mina.filter.logging.LoggingFilter;import org.apache.mina.transport.socket.nio.NioSocketConnector;import cn.org.handler.HandlerOne;public class ClintTest {    /**     * @param args     */    public static void main(String[] args) {        // 创建客户端连接器.         NioSocketConnector connector = new NioSocketConnector();         connector.getFilterChain().addLast( "logger", new LoggingFilter() );         connector.getFilterChain().addLast( "codec", new ProtocolCodecFilter( new TextLineCodecFactory( Charset.forName( "GBK" )))); //设置编码过滤器         connector.setHandler(new HandlerOne());//设置事件处理器         ConnectFuture cf = connector.connect(         new InetSocketAddress("127.0.0.1", 8888));//建立连接         cf.awaitUninterruptibly();//等待连接创建完成         cf.getSession().write("知识");//发送消息         cf.getSession().close(true);        cf.getSession().getCloseFuture().awaitUninterruptibly();//等待连接断开         connector.dispose();     }}

这样，当服务端启动的时候，客户端发送一个信息，服务端就会收到，并作相应的处理。
运行结果

客户端控制台输出：

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/Users/wanglei/.m2/repository/org/slf4j/slf4j-jdk14/1.7.7/slf4j-jdk14-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/Users/wanglei/.m2/repository/org/slf4j/slf4j-log4j12/1.3.0/slf4j-log4j12-1.3.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.JDK14LoggerFactory]
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: CREATED
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: OPENED
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: SENT: HeapBuffer[pos=0 lim=0 cap=0: empty]
发送的消息是：知识
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: CLOSED

服务端输出：

SLF4J: Found binding in [jar:file:/C:/Users/wanglei/.m2/repository/org/slf4j/slf4j-log4j12/1.3.0/slf4j-log4j12-1.3.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.JDK14LoggerFactory]
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: CREATED
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: OPENED
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: RECEIVED: 知识
received message :知识
八月 27, 2014 8:50:10 下午 org.apache.mina.filter.logging.LoggingFilter log
信息: CLOSED