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:

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package com.wtang.isay;

public interface Isay {

public String sayHello(String arg1,String arg2);

}

package com.wtang.isay;public interface Isay { public String sayHello(String arg1,String arg2);}</pre>

接口具体实现类: com.wtang.isay. IsayImpl

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package com.wtang.isay;

public class IsayImpl implements Isay {

public String sayHello(String arg1, String arg2) {

return "Hello:" + arg1 + arg2;

}

}

package com.wtang.isay;public class IsayImpl implements Isay { public String sayHello(String arg1, String arg2) { return "Hello:" + arg1 + arg2; }}</pre>
配置Web.xml:

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<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>

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

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<!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>

<!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></pre>
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:

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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"));

}

}

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")); }}</pre>

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:

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<!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>

<!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></pre>

调用:

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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"));

}

}

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")); }}</pre>

输出Hello:chenweitang