Hessian入门(与Spring集成)

Hessian入门(与Spring集成)

                                                                                                                      By:wtang

说明 ：

1.    讲述如何配置Hessian的服务器端(与Spring集成).

2.    讲述客户端如何调用

①   使用HessianProxyFactory  Hessian代理工厂直接调用

②   使用HessianProxyFactoryBean Hessian代理工厂Bean来完成接口调用.

 

1.    讲述如何配置Hessian的服务器端(与Spring集成).

 

 

 

 

 

接口定义类: com.wtang.isay. Isay:

 

 

package com.wtang.isay;

public interface Isay {
    public String sayHello(String arg1,String arg2);
}

 

 

接口具体实现类: com.wtang.isay. IsayImpl

 

package com.wtang.isay;

public class IsayImpl implements Isay {

    public String sayHello(String arg1, String arg2) {
        return "Hello:" + arg1 + arg2;
    }
}

 

配置Web.xml:

 

<servlet>
    <servlet-name>remote</servlet-name>
    <!-- 使用Spring的代理Servlet -->
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>namespace</param-name>
        <param-value>classes/remote-servlet</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>remote</servlet-name>
    <url-pattern>/remote/*</url-pattern>
</servlet-mapping>

 

配置remote-servlet.xml[该文件位于src目录下,即编译后存在与classes下]:

 

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <!-- 接口的具体实现类 -->
    <bean id="impl" class="com.wtang.isay.IsayImpl" />
    <!-- 使用Spring的HessianServie做代理 -->
    <bean name="/helloSpring"
    class="org.springframework.remoting.caucho.HessianServiceExporter">
        <!-- service引用具体的实现实体Bean-->
        <property name="service" ref="impl" />
        <property name="serviceInterface" value="com.wtang.isay.Isay" />
    </bean>

    <!-- 可以配置多个HessianServiceExporter代理Bean -->
</beans>

 

注:

      这个文件为什么叫remote-servlet.xml呢？

因为我们在web.xml中有配置：<servlet-name>remote</servlet-name>。

所以remote-servlet.xml的文件名必须以

<servlet-name>中配置的servlet-name作为文件名的开头，

且文件名的格式必须是[servlet-name]-servlet.xml格式，否则检测不到。

    即:

<param-value>classes/remote-servlet</param-value>

所以文件名为remote-servlet.xml。

 

 

2.    讲述客户端如何调用

        ① 使用HessianProxyFactory  Hessian代理工厂直接调用

 即:

       

package com.wtang.test;

import java.net.MalformedURLException;
import com.caucho.hessian.client.HessianProxyFactory;
import com.wtang.isay.Isay;

public class NormalClient {
    public static void main(String[] args) throws MalformedURLException {
        //Spring Hessian代理Servelet
        String url = "http://localhost:8080/HessianSpring/remote/helloSpring";
        HessianProxyFactory factory = new HessianProxyFactory();
        Isay api = (Isay) factory.create(Isay.class, url);

        System.out.println(api.sayHello("chen", "weitang"));
    }
}

 

 

输出Hello:chenweitang

 

2.    讲述客户端如何调用

        ② 使用HessianProxyFactoryBean Hessian代理工厂Bean来完成接口调用.

配置客户端 remote-client.xml:

 

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <!-- 客户端Hessian代理工厂Bean -->
    <bean id="clientSpring" class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
        <!-- 请求代理Servlet路径 -->
        <property name="serviceUrl">
<value>http://localhost:8080/HessianSpring/remote/helloSpring</value>
        </property>
        <!-- 接口定义 -->
        <property name="serviceInterface">
            <value>com.wtang.isay.Isay</value>
        </property>
    </bean>
</beans>

 

 

调用:

 

package com.wtang.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.wtang.isay.Isay;

public class SpringClient {
    public static void main(String[] args) {
        ApplicationContext contex = new ClassPathXmlApplicationContext(
                "remote-client.xml");

        // 获得客户端的Hessian代理工厂bean
        Isay i = (Isay) contex.getBean("clientSpring");
        System.out.println(i.sayHello("chen", "weitang"));
    }
}

 

 

输出Hello:chenweitang