1.1.  Hessian简介

Hessian:hessian是一个轻量级的remoting onhttp工具，使用简单的方法提供了RMI的功能，相比WebService，Hessian更简单、快捷。采用的是二进制RPC协议，因为采用了二进制协议，所以它很适合于发送二进制数据，Hessian主要作面向对象的消息通信。

1.2.  开发步骤

1.2.1.   导入jar包

去官网下载http://hessian.caucho.com/

1.2.2.   编写远程接口

Ihello.java

package cn.tempus.hessian;
 
public interface IHello {
  
   public String sayHello(String name);
  
 
}

1.2.3.   编写远程接口实现类

HelloImpl.java需要继承HessianServlet

package cn.tempus.hessian;
 
import com.caucho.hessian.server.HessianServlet;
 
public class HelloImpl extends HessianServlet implements IHello {
 
   private static final long serialVersionUID = -6448991611447150108L;
 
   public String sayHello(String name) {
      return "Hello: "+name;
   }
 
}

1.2.4.   Web.xml文件中配置servlet

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>HessianDemo</display-name>
<servlet>
<servlet-name>Hello</servlet-name>
<servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class>
<init-param>
<param-name>home-class</param-name>
<param-value>cn.tempus.hessian.HelloImpl</param-value>
</init-param>
<init-param>
<param-name>home-api</param-name>
<param-value>cn.tempus.hessian.IHello</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Hello</servlet-name>
<url-pattern>/Hello</url-pattern>
</servlet-mapping>
 
 
</web-app>

1.2.5.   编写客户端

Client.java

package cn.tempus.hessian;
 
import java.net.MalformedURLException;
 
import com.caucho.hessian.client.HessianProxyFactory;
 
public class Client {
 
   public static String url = "http://127.0.0.1:8080/HessianDemo/Hello";
 
   public static void main(String[] args) {
factory = new HessianProxyFactory();
      try {
iHello = (IHello) factory.create(IHello.class, url);
         System.out.println(iHello.sayHello("morris"));
      } catch (MalformedURLException e) {
e.printStackTrace();
      }
   }
 
}

1.2.6.   发布项目到jetty

Jetty后台打印

Running Jetty 6.1.26
2014-12-29 16:09:27.234:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
ParentLoaderPriority enabled
Context path:/HessianDemo
ProjectClassLoader: entry=D:\Morris\javaPrj\HessianDemo\build\classes
ProjectClassLoader: entry=D:\Morris\javaPrj\HessianDemo\WebContent\WEB-INF\lib\hessian-4.0.37.jar
2014-12-29 16:09:27.500:INFO::jetty-6.1.26
2014-12-29 16:09:29.328:INFO::Started SelectChannelConnector@0.0.0.0:8080

 

1.2.7.   运行客户端

结果如下:

Hello: morris