今天我们来学一下Burlap。
Burlap是一种基于XML远程调用技术,但与其他基于XML的远程技术(例如SOAP或者XML-RPC)不同,Burlap的消息结构尽可能的简单,不需要额外的外部定义语言(例如WSDL或IDL)。
Burlap和Hessian很大程度上,它们是一样的,唯一的区别在于Hessian的消息是二进制的,而Burlap的消息是XML。(Burlap和Hessian代码实现上也很相似)
接下来我们看一下代码的实现:
一、首先我们先创建一个实体类,这里不需要实现Serializable接口
package entity;
public class Food {
private String name;
private double price;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}
二、我们来定义一个接口
package service; import java.util.List; import entity.Food; public interface FoodService { List<Food> getFoodList(); }
三、定义一个类,实现步骤二中的接口,并继承BurlapServlet类(这里需要用到Burlap的jar文件,可以到这里下载http://www.findjar.com/jar/burlap/jars/burlap-2.1.7.jar.html)
package service.impl;
import java.util.ArrayList;
import java.util.List;
import service.FoodService;
import com.caucho.burlap.server.BurlapServlet;
import entity.Food;
public class FoodServiceImpl extends BurlapServlet implements FoodService {
public List<Food> getFoodList() {
List<Food> list=new ArrayList<Food>();
Food f1=new Food();
f1.setName("酸菜鱼");
f1.setPrice(25);
Food f2=new Food();
f2.setName("糖醋鱼");
f2.setPrice(23);
list.add(f1);
list.add(f2);
return list;
}
}
四、现在我们可以在WEB-INF下的web.xml中配置一个servlet(Hessian也可以这样配置servlet)
<servlet>
<servlet-name>food</servlet-name>
<servlet-class>service.impl.FoodServiceImpl</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>food</servlet-name>
<url-pattern>/food</url-pattern>
</servlet-mapping>
五、我们来写一下测试代码,看一下结果
package test;
import java.util.List;
import service.FoodService;
import com.caucho.burlap.client.BurlapProxyFactory;
import entity.Food;
public class Test {
public static void main(String[] args) {
String url="http://127.0.0.1:8080/test/food";
BurlapProxyFactory factory=new BurlapProxyFactory();
try {
FoodService foodSevice=(FoodService) factory.create(FoodService.class, url);
List<Food> foodList = foodSevice.getFoodList();
for (Food food : foodList) {
System.out.println(food.getName()+":"+food.getPrice()+"元。");
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
控制台显示的结果为:
=========控制台=========
酸菜鱼:25.0元。
糖醋鱼:23.0元。
========================
接下来我们看一下Spring整合Burlap,这里和Spring整合Hessian基本差不多。
Spring整合Burlap
一、我们来定义一个接口
package service;
import java.util.List;
import entity.Food;
public interface FoodService {
List<Food> getFoodList();
}
二、定义一个类,实现步骤二中的接口
package service.impl;
import java.util.ArrayList;
import java.util.List;
import service.FoodService;
import entity.Food;
public class FoodServiceImpl implements FoodService {
public List<Food> getFoodList() {
List<Food> list=new ArrayList<Food>();
Food f1=new Food();
f1.setName("酸菜鱼");
f1.setPrice(25);
Food f2=new Food();
f2.setName("糖醋鱼");
f2.setPrice(23);
list.add(f1);
list.add(f2);
return list;
}
}
三、我们可以在WEB-INF下的web.xml中配置SpringMVC需要信息
<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>
四、在applicationContext.xml中配置需要导出服务的bean信息
<bean id="foodService" class="service.impl.FoodServiceImpl"></bean>
<bean id="FoodService"
class="org.springframework.remoting.caucho.BurlapServiceExporter"
p:serviceInterface="service.FoodService"
p:service-ref="foodService"
/>
五、在WEB-INF下新建springMvc-servlet.xml文件,并配置信息
<?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="/foodService">FoodService</prop>
</props>
</property>
</bean>
</beans>
六、在客户端程序applicationContext.xml中配置获取服务的bean信息
<bean id="getFoodService"
class="org.springframework.remoting.caucho.BurlapProxyFactoryBean"
p:serviceInterface="service.FoodService"
p:serviceUrl="http://127.0.0.1:8080/test/foodService"
/>
七、现在我们编写测代码
package test;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import entity.Food;
import service.FoodService;
public class Test {
public static void main(String[] args) {
ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
FoodService foodService=(FoodService) ctx.getBean("getFoodService");
List<Food> foodList = foodService.getFoodList();
for (Food food : foodList) {
System.out.println(food.getName()+":"+food.getPrice()+"元。");
}
}
}
接下来我们把项目部署到Tomcat上面,并且启动服务。运行测试代码
======控制台=======
酸菜鱼:25.0元。
糖醋鱼:23.0元。
===================
到这里我们已经学习了Spring整合Burlap。