Spring HttpInvoker -- 通过MVC暴露服务

Spring 通过JDK的动态代理提供远程服务，轻量级，结构简单；但只对接口提供远程服务

如要对类提供动态代理，需要使用cglib。

参考文章：http://blog.csdn.net/java2000_wl/article/details/7441212

一： 暴露服务(Spring mvc暴露服务)，controller提供服务(使用注解)

1.Server接口与实现

package com.feng.service;

public interface HttpService {

    /**
     * @param name
     * @return
     */
     public String sayHello(String name);

     public String drinkTea(String teaType);  
}

package com.feng.service.impl;

import com.feng.service.HttpService;
@Service("httpService")
public class HttpServiceImpl implements HttpService {

    public String sayHello(String name) {
        return "hello:  " + name;
    }

        public String drinkTea(String teaType){
                return teaType + "is perfect!";
        }
}

2.Server配置文件

web.xml
<!-- DispatcherServlet -->
    <servlet>
        <servlet-name>Spring-DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/config/applicationContext-server.xml</param-value>
        </init-param>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>Spring-DispatcherServlet</servlet-name>
        <url-pattern>*.service</url-pattern>
    </servlet-mapping>

applicationContext-server.xml
    <bean id="httpServiceExporter" class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter" >
        <property name="service"             ref="httpService" />
        <property name="serviceInterface"     value="com.feng.service.HttpService" />
    </bean>
        
    <bean id="simpleUrlHandlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
           <property name="urlMap">
            <map>
              <entry key="/httpService.service" value-ref="httpServiceExporter" />
            </map>
        </property>
    </bean>    

3.Client端调用(需要将接口和bean打包发送到客户端)---eclipse export jar 选择bean and interface

package com.feng.service;

public interface HttpService {

    /**
     * @param name
     * @return
     */
     public String sayHello(String name);

     public String drinkTea(String teaType);  
}

据测试接口的包名和类名可以不一致，但方法必须一致；javabean包名类名属性方法必须一致。

applicationContext-client.xml
    <bean id="httpServicei"  class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
        <property name="serviceUrl"         value="http://localhost:8080/httpInvoker/httpService.service" />
        <property name="serviceInterface"     value="com.feng.service.HttpService"/>
    </bean>

public class ClientMain {
    
    private static final DefaultListableBeanFactory beanFactory;
    
    static {
        beanFactory = new DefaultListableBeanFactory();
        BeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader(beanFactory);
        Resource resource = new ClassPathResource("applicationContext-client.xml");
        beanDefinitionReader.loadBeanDefinitions(resource);
    }
    
    public static void main(String[] args) {
        HttpService httpService = beanFactory.getBean("httpServicei", HttpService.class);
        System.out.println(httpService.SayHello("王五"));
    }
}

或者使用注解

@RunWith(SpringJUnit4ClassRunner.class) 
@ContextConfiguration(Locations="../applicationContext.xml") 
public class HttpClientTest(){

    @Resource
    private HttpService httpService;

    public void testClient(){
        System.out.println(httpService.drinkTea("red tea"));
    }
}