Hessian 示例

Hessian是caucho公司开发的一种基于二进制RPC协议（Remote Procedure Call protocol）的轻量级远程调用框架

1、web.xml中新增servlet

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"><display-name>Archetype Created Web Application</display-name><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:/spring-hessian.xml</param-value></context-param><!-- 整合Spring实现 --><servlet><servlet-name>hello</servlet-name><servlet-class>org.springframework.web.context.support.HttpRequestHandlerServlet</servlet-class></servlet><servlet-mapping><servlet-name>hello</servlet-name><url-pattern>/hello</url-pattern></servlet-mapping><!-- 不整合Spring实现  --><servlet><servlet-name>hi</servlet-name><servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class><init-param><param-name>home-class</param-name><param-value>com.sky.learn.impl.HelloServiceImpl</param-value></init-param><init-param><param-name>home-api</param-name><param-value>com.sky.learn.inf.HelloService</param-value></init-param></servlet><servlet-mapping><servlet-name>hi</servlet-name><url-pattern>/hi</url-pattern></servlet-mapping></web-app>

2、整合Spring方式，需添加bean

bean的name必须与servlet的name一致，本例中为hello

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xmlns:context="http://www.springframework.org/schema/context"       xmlns:mvc="http://www.springframework.org/schema/mvc"     xmlns:cache="http://www.springframework.org/schema/cache"     xsi:schemaLocation="http://www.springframework.org/schema/beans      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd      http://www.springframework.org/schema/mvc     http://www.springframework.org/schema/mvc/spring-mvc.xsd     http://www.springframework.org/schema/context      http://www.springframework.org/schema/context/spring-context-3.0.xsd     http://www.springframework.org/schema/cache     http://www.springframework.org/schema/cache/spring-cache.xsd">       <context:annotation-config />    <context:component-scan base-package="com.sky.learn" />    <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />    <bean name="hello" class="org.springframework.remoting.caucho.HessianServiceExporter">  <property name="service" ref="helloService" />  <property name="serviceInterface" value="com.sky.learn.inf.HelloService" />  </bean>  </beans>

3、定义接口与实现类

package com.sky.learn.inf;public interface HelloService {void sayHello(String name);void sayHi(String name);}

package com.sky.learn.impl;import org.springframework.stereotype.Service;import com.sky.learn.inf.HelloService;@Service("helloService")public class HelloServiceImpl implements HelloService {@Overridepublic void sayHello(String name) {// TODO Auto-generated method stubSystem.out.println("Hello World ! Hello " + name + " !");}@Overridepublic void sayHi(String name) {// TODO Auto-generated method stubSystem.out.println("Hi, World ! Hi, " + name + " !");}}

4、测试类

package com.sky.learn.test;import com.caucho.hessian.client.HessianProxyFactory;import com.sky.learn.inf.HelloService;public class Test {public static void main(String[] args) {try {String url = "http://localhost:8080/hessian-web/hello";HessianProxyFactory factory = new HessianProxyFactory();HelloService helloService = (HelloService) factory.create(HelloService.class, url);helloService.sayHello("sky");String url2 = "http://localhost:8080/hessian-web/hi";HelloService helloService2 = (HelloService) factory.create(HelloService.class, url2);helloService2.sayHi("sky");} catch (Exception e) {e.printStackTrace();}}}

将项目发布，运行测试类控制台输出：

Hello World ! Hello sky !Hi, World ! Hi, sky !