Java学习之路-Spring的HttpInvoker学习

Hessian和Burlap都是基于HTTP的,他们都解决了RMI所头疼的防火墙渗透问题。但当传递过来的RPC消息中包含序列化对象时,RMI就完胜Hessian和Burlap了。
因为Hessian和Burlap都是采用了私有的序列化机制,而RMI使用的是Java本身的序列化机制。如果数据模型非常复杂,那么Hessian/Burlap的序列化模型可能就无法胜任了。
Spring开发团队意识到RMI服务和基于HTTP的服务之前的空白,Spring的HttpInvoker应运而生。
Spring的HttpInvoker,它基于HTTP之上提供RPC,同时又使用了Java的对象序列化机制。

程序的具体实现
一、首先我们创建一个实体类,并实现Serializable接口

package entity;
import java.io.Serializable;
public class Fruit implements Serializable {
    private String name;
    private String color;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getColor() {
        return color;
    }
    public void setColor(String color) {
        this.color = color;
    }
}

二、创建一个接口 

package service;
import java.util.List;
import entity.Fruit;
public interface FruitService {
    List<Fruit> getFruitList();
}

三、创建一个类,并实现步骤二中的接口 

package service.impl;
import java.util.ArrayList;
import java.util.List;
import service.FruitService;
import entity.Fruit;
public class FruitServiceImpl implements FruitService {
    public List<Fruit> getFruitList() {
        List<Fruit> list = new ArrayList<Fruit>();
        Fruit f1 = new Fruit();
        f1.setName("橙子");
        f1.setColor("黄色");
        Fruit f2 = new Fruit();
        f2.setName("苹果");
        f2.setColor("红色");
        list.add(f1);
        list.add(f2);
        return list;
    }
}

四、在WEB-INF下的web.xml中配置SpringMVC需要的信息 

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener
    </listener-class>
</listener>
<servlet>
    <servlet-name>springMvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springMvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping> 

 

五、在applicationContext.xml配置需要导出服务的bean信息 

<bean id="furitService" class="service.impl.FruitServiceImpl"></bean>
<bean id="FuritService"
    class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"
    p:serviceInterface="service.FruitService" p:service-ref="furitService" /> 

六、在WEB-INF下创建springMvc-servlet.xml文件,并配置urlMapping 

<?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:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="urlMapping"
        class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/fruitService">FuritService</prop>
            </props>
        </property>
    </bean>
</beans> 

七、在applicationContext.xml编写客户端所需要获得服务的bean信息 

<bean id="getFruitService"
    class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean"
    p:serviceInterface="service.FruitService"
    p:serviceUrl="http://localhost:8080/SpringHttpInvoker/fruitService" /> 

八、编写测试代码 

package test;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import entity.Fruit;
import service.FruitService;
public class Test {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext(
                "applicationContext.xml");
        FruitService fruitService = (FruitService) ctx
                .getBean("getFruitService");
        List<Fruit> fruitList = fruitService.getFruitList();
        for (Fruit fruit : fruitList) {
            System.out.println(fruit.getColor() + "的" + fruit.getName());
        }
    }
}

 

将项目部署到Tomcat上,启动Tomcat服务,并运行测试代码
===========控制台========

黄色的橙子
红色的苹果

=======================

 

posted @ 2014-11-05 07:05  泛泛而談  阅读(4314)  评论(0编辑  收藏  举报