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Java学习之路-Burlap学习

2019-11-14 21:45:13
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java学习之路-Burlap学习

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。


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