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:

 

[java] view plain copy print ?

1. package com.wtang.isay;  
2.   
3. public interface Isay {  
4.     public String sayHello(String arg1,String arg2);  
5. }  

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

[java] view plain copy print ?

1. package com.wtang.isay;  
2.   
3. public class IsayImpl implements Isay {  
4.   
5.     public String sayHello(String arg1, String arg2) {  
6.         return "Hello:" + arg1 + arg2;  
7.     }  
8. }  

package com.wtang.isay;public class IsayImpl implements Isay { public String sayHello(String arg1, String arg2) { return "Hello:" + arg1 + arg2; }}

配置Web.xml:

[java] view plain copy print ?

1. <servlet>  
2.     <servlet-name>remote</servlet-name>  
3.     <!-- 使用Spring的代理Servlet -->  
4.     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
5.     <init-param>  
6.         <param-name>namespace</param-name>  
7.         <param-value>classes/remote-servlet</param-value>  
8.     </init-param>  
9.     <load-on-startup>1</load-on-startup>  
10. </servlet>  
11.   
12. <servlet-mapping>  
13.     <servlet-name>remote</servlet-name>  
14.     <url-pattern>/remote/*</url-pattern>  
15. </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>

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

[java] view plain copy print ?

1. <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">  
2. <beans>  
3.     <!-- 接口的具体实现类 -->  
4.     <bean id="impl" class="com.wtang.isay.IsayImpl" />  
5.     <!-- 使用Spring的HessianServie做代理 -->  
6.     <bean name="/helloSpring"  
7.     class="org.springframework.remoting.caucho.HessianServiceExporter">  
8.         <!-- service引用具体的实现实体Bean-->  
9.         <property name="service" ref="impl" />  
10.         <property name="serviceInterface" value="com.wtang.isay.Isay" />  
11.     </bean>  
12.       
13.     <!-- 可以配置多个HessianServiceExporter代理Bean -->  
14. </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>

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:

       

[java] view plain copy print ?

1. package com.wtang.test;  
2.   
3. import java.net.MalformedURLException;  
4. import com.caucho.hessian.client.HessianProxyFactory;  
5. import com.wtang.isay.Isay;  
6.   
7. public class NormalClient {  
8.     public static void main(String[] args) throws MalformedURLException {  
9.         //Spring Hessian代理Servelet   
10.         String url = "http://localhost:8080/HessianSpring/remote/helloSpring";  
11.         HessianProxyFactory factory = new HessianProxyFactory();  
12.         Isay api = (Isay) factory.create(Isay.class, url);  
13.   
14.         System.out.println(api.sayHello("chen", "weitang"));  
15.     }  
16. }  

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:

[java] view plain copy print ?

1. <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">  
2. <beans>  
3.     <!-- 客户端Hessian代理工厂Bean -->  
4.     <bean id="clientSpring" class="org.springframework.remoting.caucho.HessianProxyFactoryBean">  
5.         <!-- 请求代理Servlet路径 -->          
6.         <property name="serviceUrl">  
7. <value>http://localhost:8080/HessianSpring/remote/helloSpring</value>   
8.         </property>  
9.         <!-- 接口定义 -->  
10.         <property name="serviceInterface">  
11.             <value>com.wtang.isay.Isay</value>  
12.         </property>  
13.     </bean>  
14. </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>

 

调用:

[java] view plain copy print ?

1. package com.wtang.test;  
2.   
3. import org.springframework.context.ApplicationContext;  
4. import org.springframework.context.support.ClassPathXmlApplicationContext;  
5. import com.wtang.isay.Isay;  
6.   
7. public class SpringClient {  
8.     public static void main(String[] args) {  
9.         ApplicationContext contex = new ClassPathXmlApplicationContext(  
10.                 "remote-client.xml");  
11.   
12.         // 获得客户端的Hessian代理工厂bean   
13.         Isay i = (Isay) contex.getBean("clientSpring");  
14.         System.out.println(i.sayHello("chen", "weitang"));  
15.     }  
16. }  

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