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
