Spring与Hessian整合

服务器端开发，分为以下3步：

第一步，在服务端定义好接口和实现

public interface EchoService {
    String say(String var1);
}

import com.caucho.hessian.server.HessianServlet;
import org.springframework.stereotype.Service;

@Service
public class EchoServiceImpl  implements EchoService {
	public String say(String msg) {
		return "Hello:"+msg;
	}

}

第二步，在spring配置文件中暴露服务

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

	<context:component-scan base-package="com.guge.group" />
	<context:annotation-config />
	<bean id="echoService" class="com.guge.group.service.EchoServiceImpl">
	</bean>
	<bean name="/echoService" class="org.springframework.remoting.caucho.HessianServiceExporter">
		<property name="service" ref="echoService"/>
		<property name="serviceInterface" value="com.guge.group.service.EchoService"/>
	</bean>
</beans>

第三步，在web.xml中配置servlet

    <servlet>
        <servlet-name>echo-dispatch</servlet-name>
        <servlet-class>
            com.caucho.hessian.server.HessianServlet
        </servlet-class>
        <init-param>
            <param-name>service-class</param-name>
            <param-value>com.guge.group.service.EchoServiceImpl</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>echo-dispatch</servlet-name>
        <url-pattern>/call/echo</url-pattern>
    </servlet-mapping>

客户端调用服务，有以下两种方式：

第一种，通过HessianProxyFactory调用

import com.caucho.hessian.client.HessianProxyFactory;
import com.guge.group.service.EchoService;
public class BlogList {
    public static void main(String[] args){
        try {

            String url = "http://localhost:2011/call/user";
            HessianProxyFactory factory = new HessianProxyFactory();
            EchoService echoService = (EchoService) factory.create(EchoService.class,url);
            System.out.println(echoService.say("guest"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

第二种，通过spring的bean配置获取服务

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
	http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
    <bean id="echoService " class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
        <property name="serviceUrl" value="http://localhost:2011/call/echo " />
        <property name="serviceInterface" value="com.guge.group.service.EchoService"/>
    </bean>
</beans>

import com.guge.group.service.EchoService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * Created by google on 15/5/22.
 */
public class BlogList {
    public static void main(String[] args){
        ApplicationContext contex = new ClassPathXmlApplicationContext(
                "config/spring/appcontext-client.xml");
        EchoService echo = (EchoService)contex.getBean("echoService");
        System.out.println(echo.say("nb"));
    }
}