學習dubbo項目架構時，consumer 報錯class not found

時間  2021-01-29
標籤 java web spring apache api spring-mvc mvc app jsp async 欄目 Dubbo 简体版
原文   原文鏈接

使用測試類方式啓動dubbo  指定此項目爲a項目java

1、ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("dubbo-provider.xml");web

context.start();
<!-- 聲明須要暴露的服務接口 -->
<dubbo:service interface="com.zd.service.DemoService" ref="demoService" />

<!-- 和本地bean同樣實現服務 -->
<bean id="demoService" class="com.zd.service.impl.DemoServiceImpl" />

這時候項目有兩種功能狀況：
一、   <dubbo:service interface="com.zd.service.DemoService" ref="demoService" />
  這裏interface 指定的接口能夠是a項目自己，也能夠是b項目（b項目僅僅是一個普通的java項目，a項目中加入了b項目的依賴）
使用配置類是能夠直接 這樣獲取interface ，就算這個interface在其餘java項目中仍是能顧拿到
二、若是使用web.xml 方式啓動的話，若是該接口沒有注入到Spring中，那麼就會報錯，報can not found class exception
由於經過b項目區獲取這個接口，xml會去ioc容器中去找，而a項目中的這個接口僅僅是一個普通的java項目接口，沒有注入到ioc中。

下面附上完成Springmvc 集成dubbo

Provider  
　　一、新建一個Demoservice
package com.zd.service; /** * @Author: EnzoLuo * @Date: 2018/7/12 16:14 */
public interface DemoService { String sayHello(String name); }

　　二、新建一個DemoserviceImplspring

　　

package com.zd.service.impl; import com.zd.service.DemoService; import org.springframework.stereotype.Service; @Service("demoService") //這裏要注意，不要使用dubbo的service註解，否則怎麼死的都不知道 public class DemoServiceImpl implements DemoService { public String sayHello(String name) { // TODO Auto-generated method stub
        System.out.println("hello:"+name); return "hello,"+name; } }

三、dubbo-provider.xmlapache

<?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://code.alibabatech.com/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">
 
 
     <!-- 提供方應用信息，用於計算依賴關係 -->
    <dubbo:application name="app-provider"  />
 
    <!-- 使用zookeeper註冊中心暴露服務地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" /> 
 
    <!-- 用dubbo協議在20880端口暴露服務 -->
    <dubbo:protocol name="dubbo" port="20880" />

    <!-- 聲明須要暴露的服務接口 -->
    <dubbo:service interface="com.zd.service.DemoService" ref="demoService" />
 
    <!-- 和本地bean同樣實現服務 -->
    <bean id="demoService" class="com.zd.service.impl.DemoServiceImpl" />
 
     
     
 </beans>

四、spring-mvc.xmlapi

<?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" 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-3.1.xsd 
                        http://www.springframework.org/schema/context 
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd 
                        http://www.springframework.org/schema/mvc 
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 
   
<context:component-scan base-package="com.zd.controller"></context:component-scan>
   
<mvc:annotation-driven />
   
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/"></property>
    <property name="suffix" value=".jsp"></property>

</bean>               
<import resource="dubbo-provider.xml"/>
</beans>

五、web.xmlspring-mvc

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">

    <display-name>Archetype Created Web Application</display-name>


    <!-- Spring MVC servlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此處能夠能夠配置成*.do，對應struts的後綴習慣 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>

</web-app>

這裏能夠測試一下啓動，記得打開zookeepermvc

附上pom.xmlapp

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>dubbo</artifactId>
        <groupId>com.zd</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>order-service</artifactId>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <springframework.version>3.2.4.RELEASE</springframework.version>
        <!-- Logging -->
        <slf4j.version>1.7.5</slf4j.version>
        <slf4j-log4j12.version>1.7.5</slf4j-log4j12.version>
        <log4j.version>1.2.17</log4j.version>
    </properties>

    <dependencies>
        <!-- Logging with SLF4J -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j-log4j12.version}</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <scope>compile</scope>
            <exclusions>
                <exclusion>
                    <artifactId>spring</artifactId>
                    <groupId>org.springframework</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>

        <!--servlet api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>com.zd</groupId>
            <artifactId>api</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

Consumerjsp

一、新建DemoControllerasync

package com.cwj.controller; import com.zd.service.DemoService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; /** * @Author: EnzoLuo * @Date: 2018/7/12 16:48 */ @Controller public class DemoController { @Autowired private DemoService demoService; @RequestMapping("/index") public String index(){ String name = demoService.sayHello("enzoluo"); return "test"; } }

二、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://code.alibabatech.com/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">

    <!-- 提供方應用信息，用於計算依賴關係 -->
    <dubbo:application name="app-customer"  />
 
    <!-- 使用zookeeper註冊中心暴露服務地址 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" /> 
 
    <!-- 生成遠程服務代理，能夠和本地bean同樣使用demoService -->
    <dubbo:reference id="demoService" interface="com.zd.service.DemoService" />
 
     
     </beans>

三、spring-mvc.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:p="http://www.springframework.org/schema/p" 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-3.1.xsd 
                        http://www.springframework.org/schema/context 
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd 
                        http://www.springframework.org/schema/mvc 
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> 
   
<context:component-scan base-package="com.cwj.controller"></context:component-scan> 
   
<mvc:annotation-driven />
   
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/"></property>
    <property name="suffix" value=".jsp"></property>

</bean>               
<import resource="dubbo.xml"/>
</beans>

四、web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">  
 
  <display-name>Archetype Created Web Application</display-name>


    <!-- Spring MVC servlet -->  
    <servlet>  
        <servlet-name>SpringMVC</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>classpath:spring-mvc.xml</param-value>  
        </init-param>  
        <load-on-startup>1</load-on-startup>  
        <async-supported>true</async-supported>  
    </servlet>  
    <servlet-mapping>  
        <servlet-name>SpringMVC</servlet-name>  
        <!-- 此處能夠能夠配置成*.do，對應struts的後綴習慣 -->  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>  
    <welcome-file-list>  
        <welcome-file>/index.jsp</welcome-file>  
    </welcome-file-list>  

</web-app>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.zd</groupId>
    <artifactId>protal</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>protal</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.0.2.RELEASE</version>
        </dependency>

        <!--servlet api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>
            
       <!-- dubbo 基礎包 -->
       
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.5.3</version>
            <scope>compile</scope>
            <exclusions>
                <exclusion>
                    <artifactId>spring</artifactId>
                    <groupId>org.springframework</groupId>
                </exclusion>
            </exclusions>
        </dependency> 

        <dependency>
            <groupId>com.zd</groupId>
            <artifactId>order-service</artifactId>
            <version>1.0-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>protal</finalName>
    </build>
    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
</project>

能夠啓動成功了

 

 

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