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Hessian入門(與Spring集成)

????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? By:wtang

說明 ：

1.??? 講述如何配置Hessian的服務器端(與Spring集成).

2.??? 講述客戶端如何調用

①?? 使用HessianProxyFactory? Hessian代理工廠直接調用

②?? 使用HessianProxyFactoryBean Hessian代理工廠Bean來完成接口調用.

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1.??? 講述如何配置Hessian的服務器端(與Spring集成).

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接口定義類: com.wtang.isay. Isay:

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[java] view plain copy print ?

package?com.wtang.isay;??

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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>

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接口具體實現類: com.wtang.isay. IsayImpl

[java] view plain copy print ?

package?com.wtang.isay;??

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public?class?IsayImpl?implements?Isay?{??

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????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:

[java] view plain copy print ?

<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>??

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<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[該文件位于src目錄下,即編譯后存在與classes下]:

[java] view plain copy print ?

<!DOCTYPE?beans?PUBLIC?"-//SPRING//DTD?BEAN//EN"?"http://www.springframework.org/dtd/spring-beans.dtd">??

<beans>??

????<!--?接口的具體實現類?-->??

????<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引用具體的實現實體Bean-->??

????????<property?name="service"?ref="impl"?/>??

????????<property?name="serviceInterface"?value="com.wtang.isay.Isay"?/>??

????</bean>??

??????

????<!--?可以配置多個HessianServiceExporter代理Bean?-->??

</beans>??

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans> <!-- 接口的具體實現類 --> <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引用具體的實現實體Bean--> <property name="service" ref="impl" /> <property name="serviceInterface" value="com.wtang.isay.Isay" /> </bean> <!-- 可以配置多個HessianServiceExporter代理Bean --></beans></pre>

注:

????? 這個文件為什么叫remote-servlet.xml呢？

因為我們在web.xml中有配置：<servlet-name>remote</servlet-name>。

所以remote-servlet.xml的文件名必須以

<servlet-name>中配置的servlet-name作為文件名的開頭，

且文件名的格式必須是[servlet-name]-servlet.xml格式，否則檢測不到。

??? 即:

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

所以文件名為remote-servlet.xml。

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2.??? 講述客戶端如何調用

??????? ①?使用HessianProxyFactory? Hessian代理工廠直接調用

?即:

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[java] view plain copy print ?

package?com.wtang.test;??

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import?java.net.MalformedURLException;??

import?com.caucho.hessian.client.HessianProxyFactory;??

import?com.wtang.isay.Isay;??

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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);??

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????????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>

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輸出Hello:chenweitang

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2.??? 講述客戶端如何調用

????????②?使用HessianProxyFactoryBean Hessian代理工廠Bean來完成接口調用.

配置客戶端 remote-client.xml:

[java] view plain copy print ?

<!DOCTYPE?beans?PUBLIC?"-//SPRING//DTD?BEAN//EN"?"http://www.springframework.org/dtd/spring-beans.dtd">??

<beans>??

????<!--?客戶端Hessian代理工廠Bean?-->??

????<bean?id="clientSpring"?class="org.springframework.remoting.caucho.HessianProxyFactoryBean">??

????????<!--?請求代理Servlet路徑?-->??????????

????????<property?name="serviceUrl">??

<value>http://localhost:8080/HessianSpring/remote/helloSpring</value> ??

????????</property>??

????????<!--?接口定義?-->??

????????<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> <!-- 客戶端Hessian代理工廠Bean --> <bean id="clientSpring" class="org.springframework.remoting.caucho.HessianProxyFactoryBean"> <!-- 請求代理Servlet路徑 --> <property name="serviceUrl"><value>http://localhost:8080/HessianSpring/remote/helloSpring</value> </property> <!-- 接口定義 --> <property name="serviceInterface"> <value>com.wtang.isay.Isay</value> </property> </bean></beans></pre>

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調用:

[java] view plain copy print ?

package?com.wtang.test;??

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import?org.springframework.context.ApplicationContext;??

import?org.springframework.context.support.ClassPathXmlApplicationContext;??

import?com.wtang.isay.Isay;??

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public?class?SpringClient?{??

????public?static?void?main(String[]?args)?{??

????????ApplicationContext?contex?=?new?ClassPathXmlApplicationContext(??

????????????????"remote-client.xml");??

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????????//?獲得客戶端的Hessian代理工廠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"); // 獲得客戶端的Hessian代理工廠bean Isay i = (Isay) contex.getBean("clientSpring"); System.out.println(i.sayHello("chen", "weitang")); }}</pre>

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輸出Hello:chenweitang

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轉載于:https://my.oschina.net/201003674/blog/650263

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