文章目录：

1.Dubbo概述

1.1基本架构

1.2 dubbo支持的协议

2.直连方式实现dubbo

2.1 服务提供者的创建

2.2 服务消费者的创建

2.3 启动测试！！！

1.Dubbo概述

1.1基本架构

1.2 dubbo支持的协议

2.直连方式实现dubbo

2.1 服务提供者的创建

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>dubbo</artifactId>
      <version>2.6.2</version>
    </dependency>

package com.szh.dubbo.model;

import java.io.Serializable;

/**
 *
 */
public class User implements Serializable {

    private Integer id;
    private String name;
    private Integer age;

    //getter and setter
}


package com.szh.dubbo.service;

import com.szh.dubbo.model.User;

/**
 *
 */
public interface UserService {

    User queryUserById(Integer id);
}


package com.szh.dubbo.service.impl;

import com.szh.dubbo.model.User;
import com.szh.dubbo.service.UserService;

/**
 *
 */
public class UserServiceImpl implements UserService {
    @Override
    public User queryUserById(Integer id) {

        User user=new User();
        user.setId(id);
        user.setName("张起灵");
        user.setAge(21);

        return user;
    }
}


<?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:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

    <!-- 声明dubbo服务提供者的名称：保证唯一性 -->
    <dubbo:application name="001-link-userservice-provider"/>

    <!-- 设置dubbo使用的协议和端口号 -->
    <dubbo:protocol name="dubbo" port="20880"/>

    <!-- 暴露服务接口 -->
    <dubbo:service interface="com.szh.dubbo.service.UserService" ref="a" registry="N/A"/>

    <!-- 将业务接口的实现类加载到Spring容器中 -->
    <bean id="a" class="com.szh.dubbo.service.impl.UserServiceImpl"/>

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <!-- 读取dubbo配置文件信息 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:dubbo-userservice-provider.xml</param-value>
    </context-param>
    <!-- 配置Spring的监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

2.2 服务消费者的创建

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.5.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>dubbo</artifactId>
      <version>2.6.2</version>
    </dependency>

    <dependency>
      <groupId>com.szh.dubbo</groupId>
      <artifactId>001-link-userservice-provider</artifactId>
      <version>1.0.0</version>
    </dependency>

package com.szh.dubbo.controller;

import com.szh.dubbo.model.User;
import com.szh.dubbo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 *
 */
@Controller
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping(value = "/user")
    public String userDetail(Integer id, Model model) {
        User user=userService.queryUserById(id);
        model.addAttribute("user",user);
        return "userDetail";
    }
}


<?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:dubbo="http://dubbo.apache.org/schema/dubbo"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

    <!-- 声明服务消费者名称：保证唯一性 -->
    <dubbo:application name="002-link-consumer"/>

    <!-- 引用远程接口服务 -->
    <dubbo:reference interface="com.szh.dubbo.service.UserService"
                     id="userService"
                     url="dubbo://localhost:20880"
                     registry="N/A"/>

</beans>

<?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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 组件扫描器，扫描controller包下的注解 -->
    <context:component-scan base-package="com.szh.dubbo.controller"/>

    <!-- 开启SpringMVC注解驱动 -->
    <mvc:annotation-driven/>

    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <!-- 配置SpringMVC的中央调度器，读取Spring、Dubbo配置文件信息 -->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml,classpath:dubbo-consumer.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

<%@ page contentType="text/html;charset=utf-8" language="java" %>
<html>
<head>
    <title>$</title>
</head>
<body>
    <h1>用户详情</h1>
    <div>用户编号：${user.id}</div>
    <div>用户姓名：${user.name}</div>
</body>
</html>

2.3 启动测试！！！