Dubbo整合maven+spring+springmvc+mybatis之服务消费搭建

服务消费者ivan-dubbo-web工程搭建，首先这是一个web工程，这里只存在Controller及前台view

1、在WEB_INF下新建文件夹views，并将自动生成的index.jsp，拖到views文件夹下，如上图；

2、pom.xml文件，这里依赖暴露的接口ivan-api及ivan-core工程：

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1. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
2.     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">  
3.     <modelVersion>4.0.0</modelVersion>  
4.     <span style="color:#FF9966;"><groupId>ivan</groupId>  
5.     <artifactId>ivan-dubbo-web</artifactId></span>  
6.     <packaging>war</packaging>  
7.     <span style="color:#FF9966;"><version>0.0.1-SNAPSHOT</version>  
8.     <name>ivan-dubbo-web Maven Webapp</name></span>  
9.     <url>http://maven.apache.org</url>  
10.     <properties>  
11.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
12.     </properties>  
13.   
14.     <dependencies>  
15.         <dependency>  
16.             <groupId>junit</groupId>  
17.             <artifactId>junit</artifactId>  
18.             <version>4.12</version>  
19.             <scope>test</scope>  
20.         </dependency>  
21.   
22.         <dependency>  
23.             <groupId>ivan</groupId>  
24.             <artifactId>ivan-core</artifactId>  
25.             <version>0.0.1-SNAPSHOT</version>  
26.         </dependency>  
27.   
28.         <dependency>  
29.             <groupId>ivan</groupId>  
30.             <artifactId>ivan-api</artifactId>  
31.             <version>0.0.1-SNAPSHOT</version>  
32.         </dependency>  
33.     </dependencies>  
34.     <build>  
35.         <finalName>ivan-dubbo-web</finalName>  
36.     </build>  
37. </project>  

3、web.xml，这里采用的web工程2.5版本，如果各位是2.3、3.0等，请百度修改xml文件：

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <web-app version="<span style="color:#FF0000;">2.5</span>"    
3.     xmlns="http://java.sun.com/xml/ns/javaee"    
4.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    
5.     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee    
6.     http://java.sun.com/xml/ns/javaee/web-app_<span style="color:#FF0000;">2_5</span>.xsd">   
7.       
8.     <display-name>ivan-dubbo-web</display-name>  
9.   
10.     <context-param>  
11.         <param-name>contextConfigLocation</param-name>  
12.         <param-value>classpath:spring.xml</param-value>  
13.     </context-param>  
14.   
15.     <filter>  
16.         <filter-name>encodingFilter</filter-name>  
17.         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>  
18.         <init-param>  
19.             <param-name>encoding</param-name>  
20.             <param-value>utf-8</param-value>  
21.         </init-param>  
22.         <init-param>  
23.             <param-name>forceEncoding</param-name>  
24.             <param-value>true</param-value>  
25.         </init-param>  
26.     </filter>  
27.     <filter-mapping>  
28.         <filter-name>encodingFilter</filter-name>  
29.         <url-pattern>/*</url-pattern>  
30.     </filter-mapping>  
31.   
32.   
33.     <filter>  
34.         <filter-name>hiddenHttpMethodFilter</filter-name>  
35.         <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>  
36.     </filter>  
37.   
38.     <filter-mapping>  
39.         <filter-name>hiddenHttpMethodFilter</filter-name>  
40.         <url-pattern>/*</url-pattern>  
41.     </filter-mapping>  
42.   
43.     <listener>  
44.         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
45.     </listener>  
46.   
47.     <!-- 防止spring内存溢出监听器 -->  
48.     <listener>  
49.         <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>  
50.     </listener>  
51.   
52.     <!-- 配置静态文件访问 -->  
53.     <servlet-mapping>  
54.         <servlet-name>default</servlet-name>  
55.         <url-pattern>*.jpg</url-pattern>  
56.     </servlet-mapping>  
57.     <servlet-mapping>  
58.         <servlet-name>default</servlet-name>  
59.         <url-pattern>*.png</url-pattern>  
60.     </servlet-mapping>  
61.     <servlet-mapping>  
62.         <servlet-name>default</servlet-name>  
63.         <url-pattern>*.gif</url-pattern>  
64.     </servlet-mapping>  
65.     <servlet-mapping>  
66.         <servlet-name>default</servlet-name>  
67.         <url-pattern>*.js</url-pattern>  
68.     </servlet-mapping>  
69.     <servlet-mapping>  
70.         <servlet-name>default</servlet-name>  
71.         <url-pattern>*.css</url-pattern>  
72.     </servlet-mapping>  
73.   
74.   
75.     <!-- <servlet> <servlet-name>upload</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>   
76.         <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>upload</servlet-name>   
77.         <url-pattern>/</url-pattern> </servlet-mapping> -->  
78.   
79.     <servlet>  
80.         <description>ivan-dubbo-web servlet</description>  
81.         <servlet-name>rest</servlet-name>  
82.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
83.         <init-param>  
84.             <param-name>contextConfigLocation</param-name>  
85.             <param-value>  
86.                 classpath:spring-mvc.xml  
87.             </param-value>  
88.         </init-param>  
89.         <load-on-startup>1</load-on-startup>  
90.     </servlet>  
91.     <servlet-mapping>  
92.         <servlet-name>rest</servlet-name>  
93.         <url-pattern>/</url-pattern>  
94.     </servlet-mapping>  
95.   
96.     <!-- 配置session超时时间，单位分钟 -->  
97.     <session-config>  
98.         <session-timeout>30</session-timeout>  
99.     </session-config>  
100.   
101.     <welcome-file-list>  
102.         <welcome-file>index.jsp</welcome-file>  
103.     </welcome-file-list>  
104. </web-app>  

4、spring.xml，主要阐述服务注册中心及服务暴露协议，这里为dubbo协议（这里引入的静态文件config.properties暂时没有用，可以注释掉）：

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"  
4.     xmlns:context="http://www.springframework.org/schema/context"  
5.     xsi:schemaLocation="http://www.springframework.org/schema/beans          
6.     http://www.springframework.org/schema/beans/spring-beans.xsd          
7.     http://code.alibabatech.com/schema/dubbo          
8.     http://code.alibabatech.com/schema/dubbo/dubbo.xsd  
9.     http://www.springframework.org/schema/context  
10.     http://www.springframework.org/schema/context/spring-context.xsd">  
11.   
12.     <!--引入配置属性文件 -->  
13.     <context:property-placeholder location="classpath:config.properties" />  
14.   
15.     <!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->  
16.     <dubbo:application name="ivan-dubbo-web" />  
17.   
18.     <!-- 使用zookeeper广播注册中心暴露服务地址 -->  
19.     <dubbo:registry protocol="zookeeper" address="127.0.0.1:2181" />  
20.       
21. </beans>  

5、spring-mvc.xml，这个大家应该都比较熟悉了，就是前台解析及bean的自动扫描（启动upload的配置暂时无用）：

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <beans xmlns="http://www.springframework.org/schema/beans"  
3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"  
4.     xmlns:context="http://www.springframework.org/schema/context"  
5.     xsi:schemaLocation="http://www.springframework.org/schema/beans          
6.     http://www.springframework.org/schema/beans/spring-beans.xsd          
7.     http://code.alibabatech.com/schema/dubbo          
8.     http://code.alibabatech.com/schema/dubbo/dubbo.xsd  
9.     http://www.springframework.org/schema/context  
10.     http://www.springframework.org/schema/context/spring-context.xsd">  
11.   
12.     <!--   
13.         自动扫描controller包下的所有类，如果@Controller注入为bean  
14.         并将bean依赖注入，即dubbo服务端暴露的Service注入到Controller中  
15.     -->  
16.     <dubbo:annotation package="com" />  
17.       
18.     <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->  
19.     <bean id="mappingJacksonHttpMessageConverter"  
20.         class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">  
21.         <property name="supportedMediaTypes">  
22.             <list>  
23.                 <value>text/html;charset=UTF-8</value>  
24.             </list>  
25.         </property>  
26.     </bean>  
27.   
28.     <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->  
29.     <bean  
30.         class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
31.         <property name="messageConverters">  
32.             <list>  
33.                 <!-- json转换器 -->  
34.                 <ref bean="mappingJacksonHttpMessageConverter" />  
35.             </list>  
36.         </property>  
37.     </bean>  
38.   
39.     <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->  
40.     <bean  
41.         class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
42.         <property name="viewClass"  
43.             value="org.springframework.web.servlet.view.JstlView" />  
44.         <property name="prefix" value="/WEB-INF/views/" />  
45.         <property name="suffix" value=".jsp" />  
46.     </bean>  
47.   
48.     <!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 -->  
49.     <bean id="multipartResolver"  
50.         class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
51.         <property name="defaultEncoding" value="UTF-8" />  
52.         <!-- 指定所上传文件的总大小不能超过200KB。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 -->  
53.         <property name="maxUploadSize" value="200000" />  
54.     </bean>  
55.   
56.     <!-- SpringMVC在超出上传文件限制时，会抛出org.springframework.web.multipart.MaxUploadSizeExceededException -->  
57.     <!-- 该异常是SpringMVC在检查上传的文件信息时抛出来的，而且此时还没有进入到Controller方法中 -->  
58.     <bean id="exceptionResolver"  
59.         class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">  
60.         <property name="exceptionMappings">  
61.             <props>  
62.                 <!-- 遇到MaxUploadSizeExceededException异常时，自动跳转到/WEB-INF/jsp/error_fileupload.jsp页面 -->  
63.                 <prop  
64.                     key="org.springframework.web.multipart.MaxUploadSizeExceededException">error_fileupload</prop>  
65.             </props>  
66.         </property>  
67.     </bean>  
68.   
69. </beans>  

6、log4j.properties

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1. ### set log levels ###  
2. log4j.rootLogger = INFO , C , D , E   
3.   
4. ### console ###  
5. log4j.appender.C = org.apache.log4j.ConsoleAppender  
6. log4j.appender.C.Target = System.out  
7. log4j.appender.C.layout = org.apache.log4j.PatternLayout  
8. log4j.appender.C.layout.ConversionPattern = [%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n  
9.   
10. ### log file ###  
11. log4j.appender.D = org.apache.log4j.DailyRollingFileAppender  
12. log4j.appender.D.File =../logs/IvaDubboWeb-info.log  
13. log4j.appender.D.Append = true  
14. log4j.appender.D.Threshold = INFO   
15. log4j.appender.D.layout = org.apache.log4j.PatternLayout  
16. log4j.appender.D.layout.ConversionPattern = [%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n  
17.   
18. ### exception ###  
19. log4j.appender.E = org.apache.log4j.DailyRollingFileAppender  
20. log4j.appender.E.File = ../logs/IvaDubboWeb-error.log  
21. log4j.appender.E.Append = true  
22. log4j.appender.E.Threshold = ERROR   
23. log4j.appender.E.layout = org.apache.log4j.PatternLayout  
24. log4j.appender.E.layout.ConversionPattern = [%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n  

7、创建UserController，并将ivan-api工程中的UserService依赖注入（注意：@Reference中若有其他属性，需与服务端的@Service完全对应。如：@Service(version="1.0.0")，消费者必须为@Reference(version="1.0.0")，否则是找不到服务的）：

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1. import java.util.List;  
2.   
3. import org.slf4j.Logger;  
4. import org.slf4j.LoggerFactory;  
5. import org.springframework.stereotype.Controller;  
6. import org.springframework.web.bind.annotation.RequestMapping;  
7. import org.springframework.web.bind.annotation.ResponseBody;  
8.   
9. import com.alibaba.dubbo.config.annotation.Reference;  
10. import com.ivan.api.dubbo.UserService;  
11. import com.ivan.entity.User;  
12.   
13. @Controller  
14. @RequestMapping("/user")  
15. public class UserController {  
16.       
17.     @SuppressWarnings("unused")  
18.     private static final Logger logger = LoggerFactory.getLogger(UserController.class);  
19.       
20.     @Reference  
21.     private UserService userService;  
22.       
23.     @RequestMapping("/")  
24.     public String goIndex(){  
25.         return "index";  
26.     }  
27.       
28.     @RequestMapping("/list")  
29.     @ResponseBody  
30.     public List<User> getUsers(){  
31.         return userService.getUsers();  
32.     }  
33.       
34.     @RequestMapping("/one")  
35.     @ResponseBody  
36.     public User getUserById(){  
37.         return userService.getUserByPrimaryKey("1");  
38.     }  
39. }  

至此，消费者已经搭建完成了，将工程发布到tomcat中，并启动（前提服务提供者即ivan-dubbo-server及注册中心zookeeper已经启动了），在浏览器中访问：http://127.0.0.1:8080/ivan-dubbo-web/user/list/ 或 http://127.0.0.1:8080/ivan-dubbo-web/user/one/

看到如下信息则表示搭建成功，并可以将测试添加多个注册中心，多个服务提供者的容灾了：