基于Spring的远程调用的实现
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在Spring remoting中包含三种实现方式：http-invoker，hessian，burlap。具体的配置如下：
一、服务器端配置（applicationContext.xml）：
<pre name="code"><?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"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.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.xsd">
<context:component-scan base-package="com.plateno.service" />
<bean id="beanNameUrlHandlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>
<!-- 类似rmi方式，采用java序列化，数据量较大 -->
<bean name="/httpInvokerService" class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter">
<property name="service" ref="remoteService"/>
<property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/>
</bean>
<!-- 采用hessian序列化，数据量最小 -->
<bean name="/hessianService" class="org.springframework.remoting.caucho.HessianServiceExporter">
<property name="service" ref="remoteService"/>
<property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/>
</bean>
<!-- xml传输数据，数据量比httpinvoker方式小 -->
<bean name="/burlapService" class="org.springframework.remoting.caucho.BurlapServiceExporter">
<property name="service" ref="remoteService"/>
<property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/>
</bean>
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**"/>
<bean class="com.plateno.interceptor.CommonInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
</beans>
二、服务器端配置（web.xml）
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<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>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
三、写一个service，再写一个serviceImpl就ok了。
四、客户端配置：
<pre name="code"><bean id="httpInvokerProxyFactoryBean" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
<property name="serviceUrl" value="http://localhost:9999/server/httpInvokerService"/>
<property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/>
</bean>
<bean id="hessianProxyFactoryBean" class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
<property name="serviceUrl" value="http://localhost:9999/server/hessianService"/>
<property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/>
</bean>
<bean id="burlapProxyFactoryBean" class="org.springframework.remoting.caucho.BurlapProxyFactoryBean">
<property name="serviceUrl" value="http://localhost:9999/server/burlapService"/>
<property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/>
</bean>
五、测试类：
@Autowired
private RemoteService remoteService;
@RequestMapping(value="/test")
public ModelAndView test(@RequestParam(value="name", required=false) String name) {
UserDTO dto = remoteService.getUser("hello");
System.out.println(dto);
Map<String, Object> model = new HashMap<String, Object>();
return new ModelAndView("test/hello", model);
}
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