spring http invoker 实践

搞了半天，终于把一个 Spring http invoker 的小例子运行起来了。

服务器端：

UserServices接口：

package spring.services;

public interface UserServices {
	public void printUser();
}

UserServicesImpl实现类：

package spring.services;

public class UserServicesImpl implements UserServices {
	@Override
	public void printUser() {
		System.out.println("这里只是测试了一下。");
	}
}

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"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0"><!-- DispatcherServlet --><servlet>  <servlet-name>service</servlet-name>  <servlet-class>  
            org.springframework.web.servlet.DispatcherServlet   </servlet-class>  <init-param><param-name>contextConfigLocation</param-name><param-value>WEB-INF/applicationContext.xml</param-value></init-param><load-on-startup>1</load-on-startup>  </servlet>  <servlet-mapping>  <servlet-name>service</servlet-name><url-pattern>*.service</url-pattern>  </servlet-mapping><!-- Spring配置 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 指定Spring Bean的配置文件所在目录。默认配置在WEB-INF目录下 --><context-param><param-name>contextConfigLocation</param-name><param-value>WEB-INF/applicationContext.xml</param-value></context-param><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

applicationContext.xml:

<?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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.0.xsd"><bean id="httpService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"><property name="service" ref="userServices" /><property name="serviceInterface" value="spring.services.UserServices"></property></bean><bean id="userServices" class="spring.services.UserServicesImpl" /><bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"><property name="mappings">  <props>  <prop key="/user.service">httpService</prop>  </props>  </property>  </bean></beans>

这样服务器端就搭建好了，等着客户端调用了。

地址为：http://服务器地址:端口/项目名/user.service

客户端：

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"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
	id="WebApp_ID" version="3.0"><!-- Spring配置 --><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><!-- 指定Spring Bean的配置文件所在目录。默认配置在WEB-INF目录下 --><context-param><param-name>contextConfigLocation</param-name><param-value>WEB-INF/applicationContext.xml</param-value></context-param><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

applicationContext.xml：

<?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"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context-3.0.xsd"><bean id="httpService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean"><property name="serviceUrl"><value>http://10.6.176.253:8080/spring_client/user.service</value></property><property name="serviceInterface" value="spring.services.UserServices"></property></bean></beans>

把地址改成你服务器的地址：http://服务器地址:端口/项目名/user.service

UserServlet：（随便一个servlet就可以了，action，jsp也可以）

package spring.servlets;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.context.support.WebApplicationContextUtils;

import spring.services.UserServices;

@WebServlet("/UserServlet")
public class UserServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		UserServices userServices = (UserServices) WebApplicationContextUtils   
		        .getRequiredWebApplicationContext(   
		            request.getSession().getServletContext()).getBean("httpService");   
		System.out.println("--------------------------");
		userServices.printUser();
		System.out.println("--------------------------");
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		this.doGet(request, response);
	}
}

调用这个servlet的时候就会调用服务器端的

userServices.printUser();

了，当然，这方法是在服务器运行的，运行结果在服务器上面。