Hessian（Spring集成的）的应用与研究

      研究Spring集成的hessian-rpc在不同版本的JVM之间是否支持传递复杂对象以及是否支持引用参数传递。
       1.核心对象People、Person、Address、Boyfriend1、Boyfriend2。通过Hessian传输的对象都要实现java.io.Serializable接口。
     
      
       2.接口PeopleService  接口实现PeopleServiceImpl
      PeopleService.java

public interface PeopleService {
	
	public People getPeopleByName(String name);

}

      PeopleServiceImpl.java

public class PeopleServiceImpl implements PeopleService {

	private People people;

	public void setPeople(People people) {
		this.people = people;
	}

	public People getPeopleByName(String name) {
		return people;
	}
}

      3.核心配置文件
          applicationContext-hessianrpc-hessian.xml

<bean id="peopleServiceRemote" name="/peopleServiceRemote"
		class="org.springframework.remoting.caucho.HessianServiceExporter">
		<property name="service" ref="peopleService"></property>
		<property name="serviceInterface">
			<value>com.mangocity.hessianrpc.service.PeopleService</value>
		</property>

	</bean>

applicationContext-hessianrpc-services.xml

<bean id="peopleService" class="com.mangocity.hessianrpc.service.impl.PeopleServiceImpl">
           <property name="people" ref="people">
           </property>
      </bean>
      
      <bean id="people" class="com.mangocity.hessianrpc.pojo.People" >
           <property name="name"> <value>fenglin</value></property>
           <property name="boyfriend" ref="boyfriend"></property>
           <property name="boyfriend1" ref="boyfriend1"></property>
           <property name="boyfriends">
             <list>
                <ref bean="boyfriend"/>
                <ref bean="boyfriend1"/>
             </list>
           </property>
           
           <property name="boyfriendMap">
             <map>
                <entry>
                  <key><value>fengluan</value></key>
                  <ref bean="boyfriend"/>
                </entry>
                <entry>
                  <key><value>fengluan1</value></key>
                  <ref bean="boyfriend1"/>
                </entry>
             </map>
           </property>
           <property name="boyfriendSet">
             <set>
                <ref bean="boyfriend"/>
                <ref bean="boyfriend1"/>
             </set>
           </property>
      </bean>
      
      <bean id="boyfriend" class="com.mangocity.hessianrpc.pojo.Boyfriend">
           <property name="address">
                 <ref bean="address"/>
           </property>
      </bean>
      
      <bean id="boyfriend1" class="com.mangocity.hessianrpc.pojo.Boyfriend1">
           <property name="address">
                 <ref bean="address"/>
           </property>
      </bean>
      
      <bean id="address" class="com.mangocity.hessianrpc.pojo.Address">
           <property name="zipCode"><value>518000</value>
           </property>
           <property name="url"><value>深圳市芒果网有限公司</value>
           </property>
      </bean>

web.xml

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			classpath:spring/applicationContext-hessianrpc-beans.xml
		</param-value>
	</context-param>
	<listener>
		<listener-class>
			org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>
	
	<servlet>
		<servlet-name>Hessian</servlet-name>
		<servlet-class>
			org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>
				classpath:spring/applicationContext-hessianrpc-hessian.xml
			</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<servlet-mapping>
		<servlet-name>Hessian</servlet-name>
		<url-pattern>/hessian/*</url-pattern>
	</servlet-mapping>

         4.hessian访问客户端
             HessianRPCClient.java

public class HessianRPCClient {
	
	String url;
	/**
	 * 
	 */
	public HessianRPCClient(String url) {
		this.url = url;
	}
	
	public People getPeopleFromPeopleService(String name){
		
		HessianProxyFactory factory = new HessianProxyFactory();
		try {
			PeopleService proxy = (PeopleService)factory.create(PeopleService.class, url);
		    return proxy.getPeopleByName(name);
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}
		return new People();
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		
		HessianRPCClient client = new HessianRPCClient("http://127.0.0.1:8088/hessianRPC/hessian/peopleServiceRemote");
        People people = client.getPeopleFromPeopleService("people");
        System.out.println(people.getName());
		System.out.println(people.getBoyfriend().getAddress() == people.getBoyfriend1().getAddress());
		System.out.println(people.getBoyfriend() == people.getBoyfriends().get(0));
		System.out.println(people.getBoyfriendMap().get("fengluan") == people.getBoyfriendSet().iterator().next());
		System.out.println(people.getBoyfriend() == people.getBoyfriendMap().get("fengluan"));
	}

}

       6.将项目发布到tomcat上，启动客户访问，测试结果：
        Hessian-rpc支持在不同的JVM版本之间传递复杂对象，并且还支持引用参数传递。速度的话，在传输小对象比RMI还快，传输大对象则不如RMI。