极简配置的dubbo入门(二)—— SpringMVC的实现(通过注解的方式获取远程服务)
在https://blog.****.net/CharleyZz/article/details/82945062 中,已经实现了最基本的dubbo入门,本文将实现dubbo简单的mvc。
一、创建maven工程
1.dubbo-mvc-demo:父工程,用于统一管理依赖的jar
2.dubbo-mvc-demo-api:子工程,提供实体类和服务接口
3.dubbo-mvc-demo-service:子工程,服务接口的实现,提供测试类TestProvider.java通过main方法启动
——com.alibaba.dubbo.container.Main.main(args)
4.dubbo-mvc-demo-web:子工程,用于实现Controller和View(该项目侧重点在于利用注解的方式在控制层获取服务接口),通过Tomcat启动
二、主要代码实现
1.dubbo-mvc-demo引入公共依赖
<properties>
<dubbo.version>2.6.3</dubbo.version>
<zookeeper.version>3.4.13</zookeeper.version>
<curator.version>4.0.1</curator.version>
<spring.version>4.3.16.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>${zookeeper.version}</version>
</dependency>
<dependency>
<groupId>org.apache.curator</groupId>
<artifactId>curator-framework</artifactId>
<version>${curator.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- 用于实体类序列化 -->
<dependency>
<groupId>com.caucho</groupId>
<artifactId>hessian</artifactId>
<version>4.0.38</version>
</dependency>
</dependencies>
2.实体类与服务接口
实体类:
public class User implements Serializable{
private String userId;
private String name;
public User() {}
public User(String userId, String name) {
this.userId = userId;
this.name = name;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
注意事项:需要实现序列化接口,dubbo序列化的依赖在前面有提到。
接口的定义:
三、服务接口的实现
接口的实现:
dubbo的配置文件:
通过com.alibaba.dubbo.container.Main.main(args)启动测试类TestProvider。
四、web层的实现
controller:
dubbo的配置文件:
applicationContext-mvc.xml
<!-- Controller层扫描 -->
<context:component-scan base-package="com.lzc.*" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 开启注解扫描 -->
<mvc:annotation-driven>
<mvc:message-converters>
<!-- 将StringHttpMessageConverter的默认编码设为UTF-8 -->
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<constructor-arg value="UTF-8" />
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
applicationContext.xml只要引入dubbo-web.xml和applicationContext-mvc.xml
<!-- 引入springmvc配置文件 -->
<import resource="applicationContext-mvc.xml"/>
<!-- 引入dubbo配置文件 -->
<import resource="dubbo-web.xml"/>
web.xml
<servlet>
<servlet-name>springHandler</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:META-INF/spring/applicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:META-INF/spring/applicationContext.xml</param-value>
</context-param>
<servlet-mapping>
<servlet-name>springHandler</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
通过Tomcat启动,访问http://localhost:8080/dubbo-mvc-demo-web/hello/sayHello
访问 http://localhost:8080/dubbo-mvc-demo-web/user/getName
好了,完成。
代码已上传****: https://download.****.net/download/charleyzz/10713608