基于SpringMVC XML配置文件的Dubbo开发与使用

[模块一]

首先引入Dubbo的依赖资源，这里我们使用基于SpringMVC的项目于Dubbo进行整合

先进行依赖导入。

pom.xml

        <!--zookeeper-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>

        <!--dubbo-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>${curator.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>${curator.version}</version>
        </dependency>

        <!--database-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis-spring.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql-connector.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <!--Spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!--log-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j-api.version}</version>
        </dependency>
    </dependencies>

首先是服务提供者端，在这里可以理解为Service和Dao层，这是一个单独的项目[SpringMVC_Provider]

第一步，创建Dao

/**
 * 用户持久层接口
 */
public interface UserDao {

    /**
     * 基于id去查询数据
     *
     * @param id 用户id
     * @return 用户数据
     */
    User findById(@Param("id") Integer id);
}

第二步、使用mybatis映射该接口，以实现数据查询

UserDao.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.aircoinst.dao.UserDao">
    <!--基于id查询数据-->
    <select id="findById" parameterType="integer" resultType="com.aircoinst.pojo.User">
        select *
        from t_user
        where id = #{id}
    </select>
</mapper>

第三步，创建接口与类

UserService

/**
 * 用户的业务接口
 */
public interface UserService {
    /**
     * 根据用户id来查询用户数据
     *
     * @param id 用户id
     * @return 用户对象
     */
    public User findById(Integer id);
}

实现这个接口

/**
 * 用户业务接口实现类
 */
public class UserServiceImpl implements UserService {

    //依赖注入
    @Autowired
    private UserDao userDao;

    /**
     * 基于id查询用户
     *
     * @param id 用户id
     * @return 用户数据
     */
    @Override
    public User findById(Integer id) {
        return userDao.findById(id);
    }
}

第四步，创建Spring配置文件

spring-dubbo.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: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://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd">

    <!--配置dubbo_provider工程的dubbo应用名称-->
    <dubbo:application name="dubboProvider"/>

    <!--配置dubbo注册zookeeper地址-->
    <dubbo:registry address="zookeeper://192.168.10.101:2181"/>

    <!--配置需要暴露出来的接口与接口实现类和超时时间-->
    <dubbo:service interface="com.aircoinst.service.UserService" ref="userService" timeout="1200000"/>

    <!--接口实现类对象-->
    <bean id="userService" class="com.aircoinst.service.impl.UserServiceImpl"/>

</beans>

spring-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!--导入properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--配置数据源-->
    <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!--配置SqlSessionFactoryBean-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="druidDataSource"/>
        <property name="typeAliasesPackage" value="com.aircoinst.pojo"/>
    </bean>

    <!--配置Mapper扫描器-->
    <bean id="scannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.aircoinst.dao"/>
    </bean>

</beans>

spring-service.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:contex="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--开启注解扫描-->
    <contex:component-scan base-package="com.aircoinst.service"/>

    <!--配置事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="druidDataSource"/>
    </bean>

    <!--开启事务-->
    <tx:annotation-driven/>
</beans>

这个服务提供者端就创建成功了，并配置Tomcat使该服务提供者端的端口号为8080

[模块二]

然后是服务消费者端，在这里可以理解为Controller和View层，这是一个单独的项目[SpringMVC_C]

先进行依赖导入

pom.xml

    <dependencies>
        <!--引入dubbo_interface子模块-->
        <dependency>
            <groupId>org.example</groupId>
            <artifactId>dubbo_interface</artifactId>
            <version>1.0</version>
        </dependency>

        <!--servlet-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>${servlet-api.version}</version>
        </dependency>

        <!--zookeeper-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>${zookeeper.version}</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>${dubbo.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>${curator.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>${curator.version}</version>
        </dependency>

        <!--Spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!--json-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson-annotations.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson-annotations.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson-annotations.version}</version>
        </dependency>

        <!--log-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
    </dependencies>

第一步，创建Controller

UserController

package com.aircoinst.controller;

import com.aircoinst.pojo.User;
import com.aircoinst.service.UserService;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * 用户操作控制器
 */
@RequestMapping("/user")
public class UserController {

    //依赖注入Service对象
    private UserService userService;

    public void setUserService(UserService userService) {
        this.userService = userService;
    }

    /**
     * 基于id查询用户
     *
     * @param id 用户id
     * @return 用户对象
     */
    @RequestMapping("/findById")
    @ResponseBody
    public User findById(Integer id) {
        return userService.findById(id);
    }
}

第二步，创建Spring配置文件

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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">

    <!--开启注解扫描-->
    <context:component-scan base-package="com.aircoinst.controller"/>

    <!--开启mvc注解-->
    <mvc:annotation-driven/>

</beans>

spring-dubbo.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: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">

    <!--配置dubbo_consumer工作在dubbo中应用名称-->
    <dubbo:application name="dubboConsumer"/>

    <!--配置dubbo注册中心zookeeper地址-->
    <dubbo:registry address="zookeeper://192.168.10.101:2181"/>

    <!--配置需要订阅的业务接口以及引用-->
    <dubbo:reference id="userService" interface="com.aircoinst.service.UserService"/>

    <!--初始化控制器，并把远程service注入到controller-->
    <bean id="userController" class="com.aircoinst.controller.UserController">
        <property name="userService" ref="userService"/>
    </bean>

    <!--启动时检查提供者是否存在-->
    <dubbo:consumer check="true"/>
</beans>

这个服务提供者端创建成功了，并配置Tomcat使该服务提供者端的端口号为8081

使用浏览器输入http://localhost:8081/user/findById.do?id=1 发现数据返回正确就可以使用了。