Java学习之Hessian通信基础

public interface IHello {

    String sayHello();
   
}

public class IHelloImpl extends HessianServlet implements IHello {

    @Override
    public String sayHello() {
        // TODO Auto-generated method stub
        return "Hello,I from HessianService";
    }

}

public class ClientTest {

    public static String url = "http://127.0.0.1:8080/HessianService/Hello";
    public static void  main(String[] args){
        HessianProxyFactory factory = new HessianProxyFactory();
        try {
            IHello iHello = (IHello) factory.create(IHello.class, url);
            System.out.println(iHello.sayHello());
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

 <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>com.kcpt.hessian.service.IHelloImpl</param-value>
    </init-param>
    <init-param>
      <param-name>home-api</param-name>
      <param-value>com.kcpt.hessian.service.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>

<?xml version = "1.0" encoding = "UTF-8" ?>
<beans xmlns = "http://www.springframework.org/schema/beans"
       xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop = "http://www.springframework.org/schema/aop"
       xmlns:tx = "http://www.springframework.org/schema/tx"
       xsi:schemaLocation = "http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd" >    
          
  <!-- 定义普通的bean实例 -->
  <bean id="Hello" class="com.kcpt.hessian.service.IHelloImpl"/>
    <!--  使用HessianServiceExporter 将普通bean导出成Hessian服务-->
    <bean name="/remoting" class="org.springframework.remoting.caucho.HessianServiceExporter">
    <!--  需要导出的目标bean-->
     <property name="service" ref="Hello"/>
       <!--  Hessian服务的接口-->
     <property name="serviceInterface" value="com.kcpt.hessian.service.IHello"/>
    </bean>
  </beans>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> <!--添加监听器 -->
</listener>
<!-- 指定spring的配置文件在哪里，在这个配置文件中导出了Hessian服务 -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/remoting-servlet.xml</param-value> 
</context-param>
<!-- Hessian通过Servlet提供远程服务，需要将某个匹配的模式映射到hessian服务中，spring的dispatcherServlet能 完成此功能，DispatcherServlet可将匹配模式的请求转发到Hessian服务，web.xml只是定义了“请求转发器”，该转发器将匹配 /remoting/*的请求截获，转发给context的bean处理。而HessianServiceExporter提供bean服务。 -->
<servlet>
   <servlet-name>remoting</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
           <load-on-startup>1</load-on-startup>
    </servlet>
<servlet-mapping>
<servlet-name>remoting</servlet-name>
<url-pattern>/remoting/*</url-pattern>
</servlet-mapping>

<?xml version = "1.0" encoding = "UTF-8" ?>
<beans xmlns = "http://www.springframework.org/schema/beans"
       xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop = "http://www.springframework.org/schema/aop"
       xmlns:tx = "http://www.springframework.org/schema/tx"
       xsi:schemaLocation = "http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd" >    
<bean id="myServiceClient" class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
<property name="serviceUrl">            //hessian的地址和名称请求转发的名称
<value>http://127.0.0.1:8080/HessianService/remoting</value>
</property>                          
<property name="serviceInterface">   //hessian所要调用的接口
<value>com.kcpt.hessian.service.IHello</value>
</property>
</bean>
</beans>

ApplicationContext context = new ClassPathXmlApplicationContext("com/kcpt/hessian/client/remoting-client.xml");  //这里只是你声明的bean的xml文件所在的路径
        IHello b = (IHello) context.getBean("myServiceClient");