之前我们讲到了Mina的基本知识点。如果还有不懂得同学可以看一下我的博客:我是传送门。今天我着重来讲一下基于Mina的客户端的开发(代码均在最后链接地址中,欢迎下载)。
这里我展示几个比较重要的类来详细说明一下:
package com.example.mina.server;
import java.net.InetSocketAddress;
import org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder;
import org.apache.mina.core.future.CloseFuture;
import org.apache.mina.core.future.ConnectFuture;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolCodecFilter;
import org.apache.mina.filter.logging.LoggingFilter;
import org.apache.mina.filter.ssl.SslFilter;
import org.apache.mina.transport.socket.SocketConnector;
import org.apache.mina.transport.socket.nio.NioSocketConnector;
import com.example.mina.charset.CharsetFactory;
import com.example.mina.hanlder.MsgHanler;
import com.example.mina.ssl.SSLContextGenerator;
/**
*
* Project Name:MinaClient
* Package:com.example.mina.server
* FileName:MinaClient.java
* Purpose:客户端
* Create Time: 2014-8-19 下午4:36:55
* Create Specification:
* Modified Time:
* Modified by:
* Modified Specification:
* Version: 1.0
*
*
* @author myp
*/
public class MinaClient {
private SocketConnector connector;
private ConnectFuture future;
private IoSession session;
public boolean connect() {
/*
* 1.创建一个socket连接,连接到服务器
*/
connector = new NioSocketConnector();
/*
* 获取过滤器链,用于添加过滤器
*/
DefaultIoFilterChainBuilder chain = connector.getFilterChain();
/*
* 2.为连接添加过滤器,SSL、日志、编码过滤器
*/
// SSLContextGenerator是我们自己写的一个SSL上下文产生器,稍后会讲到
SslFilter sslFilter = new SslFilter(
new SSLContextGenerator().getSslContext());
// 设置为客户端模式
sslFilter.setUseClientMode(true);
// a.ssl过滤器,这个一定要第一个添加,否则数据不会进行加密
chain.addFirst("sslFilter", sslFilter);
// b.添加日志过滤器
chain.addLast("logger", new LoggingFilter());
// c.添加字符的编码过滤器
chain.addLast("codec", new ProtocolCodecFilter(new CharsetFactory()));
/*
* 3.设置消息处理器,用于处理接收到的消息
*/
connector.setHandler(new MsgHanler());
/*
* 4.根据IP和端口号连接到服务器
*/
future = connector.connect(new InetSocketAddress("192.168.1.12", 3456));
// 等待连接创建完成
future.awaitUninterruptibly();
/*
* 5.获取session对象,通过session可以向服务器发送消息;
*/
session = future.getSession();
session.getConfig().setUseReadOperation(true);
return future.isConnected();
}
/**
* 往服务器发送消息
*
* @param message
*/
public void sendMsg2Server(String message) {
session.write(message);
}
/**
* 关闭与服务器的连接
*
* @return
*/
public boolean close() {
CloseFuture future = session.getCloseFuture();
future.awaitUninterruptibly(1000);
connector.dispose();
return true;
}
}
MinaClient就是按照第二步当中的流程走过来的;所以编程的时候最主要的是整体的思路,思路明白了那么编程就会变得异常效率。
package com.example.mina.ssl;
import java.io.File;
import java.security.KeyStore;
import javax.net.ssl.SSLContext;
import org.apache.mina.filter.ssl.KeyStoreFactory;
import org.apache.mina.filter.ssl.SslContextFactory;
/**
*
* Project Name:SSLContextGenerator
* Package:com.example.mina.ssl
* FileName:SSLContextGenerator.java
* Purpose:客户端
* Create Time: 2014-8-19 下午4:41:55
* Create Specification:
* Modified Time:
* Modified by:
* Modified Specification:
* Version: 1.0
*
*
* @author myp
*/
public class SSLContextGenerator {
/**
* 这个方法,通过keystore和truststore文件返回一个SSLContext对象
*
* @return
*/
public SSLContext getSslContext() {
SSLContext sslContext = null;
try {
/*
* 提供keystore的存放目录,读取keystore的文件内容
*/
File keyStoreFile = new File("C:/Users/Administrator/keystore.jks");
/*
* 提供truststore的存放目录,读取truststore的文件内容
*/
File trustStoreFile = new File(
"C:/Users/Administrator/truststore.jks");
if (keyStoreFile.exists() && trustStoreFile.exists()) {
final KeyStoreFactory keyStoreFactory = new KeyStoreFactory();
System.out.println("Url is: " + keyStoreFile.getAbsolutePath());
keyStoreFactory.setDataFile(keyStoreFile);
/*
* 这个是当初我们使用keytool创建keystore和truststore文件的密码,也是上次让你们一定要记住密码的原因了
*/
keyStoreFactory.setPassword("123456");
final KeyStoreFactory trustStoreFactory = new KeyStoreFactory();
trustStoreFactory.setDataFile(trustStoreFile);
trustStoreFactory.setPassword("123456");
final SslContextFactory sslContextFactory = new SslContextFactory();
final KeyStore keyStore = keyStoreFactory.newInstance();
sslContextFactory.setKeyManagerFactoryKeyStore(keyStore);
final KeyStore trustStore = trustStoreFactory.newInstance();
sslContextFactory.setTrustManagerFactoryKeyStore(trustStore);
sslContextFactory
.setKeyManagerFactoryKeyStorePassword("123456");
sslContext = sslContextFactory.newInstance();
System.out.println("SSL provider is: "
+ sslContext.getProvider());
} else {
System.out
.println("Keystore or Truststore file does not exist");
}
} catch (Exception ex) {
ex.printStackTrace();
}
return sslContext;
}
}
如果不知道如何创建keystore和truststore文件的话,请查看我的这篇博客:http://blog.csdn.net/u010049692/article/details/38686659
package com.example.mina.hanlder;
import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IoSession;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* Project Name:MsgHanler
* Package:com.example.mina.handler
* FileName:MsgHanler.java
* Purpose:I/O消息处理器,从这里我们就可以看出Mina是事件驱动的
* Create Time: 2014-8-19 下午4:39:55
* Create Specification:
* Modified Time:
* Modified by:
* Modified Specification:
* Version: 1.0
*
*
* @author myp
*/
public class MsgHanler extends IoHandlerAdapter {
private static final Logger log = LoggerFactory.getLogger(MsgHanler.class);
@Override
public void exceptionCaught(IoSession session, Throwable cause)
throws Exception {
// 出现异常
log.error("--------exception--------");
super.exceptionCaught(session, cause);
}
@Override
public void messageReceived(IoSession session, Object message)
throws Exception {
// 从服务器中接收到消息后的处理
log.info("--------msg receive--------");
log.info("Message:{}" + message.toString());
super.messageReceived(session, message);
}
@Override
public void messageSent(IoSession session, Object message) throws Exception {
// 往服务器中发送消息
log.info("--------msg sent--------");
super.messageSent(session, message);
}
@Override
public void sessionCreated(IoSession session) throws Exception {
// 当session被创建的时候调用
log.info("--------session create--------");
super.sessionCreated(session);
}
}
基本上我们最主要的就是对在I/O处理器这里对收到的消息进行处理,也是编程的核心所在!
log4j.rootCategory=INFO, stdout , R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n
log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.File=D:\\Mina\\logs\\client.log
log4j.appender.R.layout=org.apache.log4j.PatternLayout
1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n
log4j.logger.com.neusoft=DEBUG
log4j.logger.com.opensymphony.oscache=ERROR
log4j.logger.net.sf.navigator=ERROR
log4j.logger.org.apache.commons=ERROR
log4j.logger.org.apache.struts=WARN
log4j.logger.org.displaytag=ERROR
log4j.logger.org.springframework=DEBUG
log4j.logger.com.ibatis.db=WARN
log4j.logger.org.apache.velocity=FATAL
log4j.logger.com.canoo.webtest=WARN
log4j.logger.org.hibernate.ps.PreparedStatementCache=WARN
log4j.logger.org.hibernate=DEBUG
log4j.logger.org.logicalcobwebs=WARN
log4j.rootCategory=INFO, stdout , R
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n
log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
log4j.appender.R.File=D:\\Tomcat 5.5\\logs\\qc.log
log4j.appender.R.layout=org.apache.log4j.PatternLayout
1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n
log4j.logger.com.neusoft=DEBUG
log4j.logger.com.opensymphony.oscache=ERROR
log4j.logger.net.sf.navigator=ERROR
log4j.logger.org.apache.commons=ERROR
log4j.logger.org.apache.struts=WARN
log4j.logger.org.displaytag=ERROR
log4j.logger.org.springframework=DEBUG
log4j.logger.com.ibatis.db=WARN
log4j.logger.org.apache.velocity=FATAL
log4j.logger.com.canoo.webtest=WARN
log4j.logger.org.hibernate.ps.PreparedStatementCache=WARN
log4j.logger.org.hibernate=DEBUG
log4j.logger.org.logicalcobwebs=WARN
我们可以再这里设置我们的日志输出目录:log4j.appender.R.File=D:\\Mina\\logs\\client.log
3. SSL加密中,如果不知道如何使用keystore生成keystore和truststore文件,可以查看这篇博客:http://blog.csdn.net/u010049692/article/details/38686659
4. 在添加过滤器的时候,处理的顺序是按照添加过滤器的顺序;
5. Mina在使用过滤器的时候,只要在需要的地方添加就可以了,不一定是服务器、客户端都要添加的。就是说,服务器、客户端编程的时候服务器有这个过滤器,客户端可以有也可以没有。
点我下载
下载后导入到Eclipse当中,将com.example.mina.server包下面的MinaClient类中的下面代码注释掉,然后就可以正常运行了!原因是你本地不存在keystore和truststore文件,如果需要生成请看注意事项中第三条。
SslFilter sslFilter = new SslFilter( new SSLContextGenerator().getSslContext()); sslFilter.setUseClientMode(true); chain.addFirst("sslFilter", sslFilter);
下一篇应该是Mina的服务器的开发,欢迎订阅!
我的博客园地址:http://www.cnblogs.com/getherBlog/p/3937196.html