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学习淘淘商城第十三课（引用dubbo服务）

2018-02-26 21:31 627 查看
上节课我们一起学习了如何发布一个dubbo服务，这节我们一起学习下web工程如何引用dubbo发布的服务。         首先我们在web工程也需要添加dubbo的依赖，由于我们在taotao-manager-service工程已经添加了dubbo的依赖并且解决了包冲突的问题，那么我们便可以直接把taotao-manager-service工程下的关于dubbo的依赖部分拷贝过来，拷贝的内容如下：[html] view plain copy<!-- dubbo相关的jar包 -->  
    <dependency>  
        <groupId>com.alibaba</groupId>  
        <artifactId>dubbo</artifactId>  
        <exclusions>  
            <exclusion>  
                <artifactId>spring</artifactId>  
                <groupId>org.springframework</groupId>  
            </exclusion>  
            <exclusion>  
                <artifactId>netty</artifactId>  
                <groupId>org.jboss.netty</groupId>  
            </exclusion>  
        </exclusions>  
    </dependency>  
    <dependency>  
        <groupId>org.apache.zookeeper</groupId>  
        <artifactId>zookeeper</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>com.github.sgroschupf</groupId>  
        <artifactId>zkclient</artifactId>  
    </dependency>  
         拷贝后的taotao-manager-web工程的pom.xml文件的内容如下：[html] view plain copy<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">  
  <modelVersion>4.0.0</modelVersion>  
  <parent>  
    <groupId>com.taotao</groupId>  
    <artifactId>taotao-parent</artifactId>  
    <version>0.0.1-SNAPSHOT</version>  
  </parent>  
  <groupId>com.taotao</groupId>  
  <artifactId>taotao-manager-web</artifactId>  
  <version>0.0.1-SNAPSHOT</version>  
  <packaging>war</packaging>  
    
  <dependencies>  
    <!-- 依赖taotao-common -->  
    <dependency>  
        <groupId>com.taotao</groupId>  
        <artifactId>taotao-common</artifactId>  
        <version>0.0.1-SNAPSHOT</version>  
    </dependency>  
    <!-- Spring -->  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-context</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-beans</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-webmvc</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jdbc</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-aspects</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jms</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-context-support</artifactId>  
    </dependency>  
    <!-- JSP相关 -->  
    <dependency>  
        <groupId>jstl</groupId>  
        <artifactId>jstl</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>servlet-api</artifactId>  
        <scope>provided</scope>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>jsp-api</artifactId>  
        <scope>provided</scope>  
    </dependency>  
    <!-- dubbo相关的jar包 -->  
    <dependency>  
        <groupId>com.alibaba</groupId>  
        <artifactId>dubbo</artifactId>  
        <exclusions>  
            <exclusion>  
                <artifactId>spring</artifactId>  
                <groupId>org.springframework</groupId>  
            </exclusion>  
            <exclusion>  
                <artifactId>netty</artifactId>  
                <groupId>org.jboss.netty</groupId>  
            </exclusion>  
        </exclusions>  
    </dependency>  
    <dependency>  
        <groupId>org.apache.zookeeper</groupId>  
        <artifactId>zookeeper</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>com.github.sgroschupf</groupId>  
        <artifactId>zkclient</artifactId>  
    </dependency>  
  </dependencies>  
  <build>  
    <plugins>  
        <plugin>  
            <groupId>org.apache.tomcat.maven</groupId>  
            <artifactId>tomcat7-maven-plugin</artifactId>  
            <configuration>  
                <path>/</path>  
                <port>8081</port>  
            </configuration>  
        </plugin>  
    </plugins>  
  </build>  
</project>  
       下面我们需要在taotao-manager-web工程下的springmvc.xml文件中引用dubbo服务，添加的内容如下。其中<dubbo:application name="taotao-manager-web"/>是要在注册中心申报一下名字，名字不能冲突。<dubbo:registry protocol="zookeeper" address="192.168.25.167:2181"/>同服务端一样，在注册中心注册下dubbo服务所在的IP及端口。<dubbo:reference interface="com.taotao.service.ItemService" id="itemService" />便是要引用服务端的接口了。[html] view plain copy<!-- 引用dubbo服务 -->  
    <dubbo:application name="taotao-manager-web"/>  
    <dubbo:registry protocol="zookeeper" address="192.168.25.167:2181"/>    
    <dubbo:reference interface="com.taotao.service.ItemService" id="itemService" />  
      引用dubbo服务之后springmvc的完整内容如下：[html] view plain copy<?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:dubbo="http://code.alibabatech.com/schema/dubbo"  
    xmlns:mvc="http://www.springframework.org/schema/mvc"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd  
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd  
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd  
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">  
          
    <!-- 配置注解驱动 -->  
    <mvc:annotation-driven />  
    <!-- 视图解析器 -->  
    <bean  
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <property name="prefix" value="/WEB-INF/jsp/" />  
        <property name="suffix" value=".jsp" />  
    </bean>  
    <!-- 配置包扫描器，扫描@Controller注解的类 -->  
    <context:component-scan base-package="com.taotao.controller"/>  
      
    <!-- 引用dubbo服务 -->  
    <dubbo:application name="taotao-manager-web"/>  
    <dubbo:registry protocol="zookeeper" address="192.168.25.167:2181"/>    
    <dubbo:reference interface="com.taotao.service.ItemService" id="itemService" />  
</beans>  
      由于taotao-manager-web工程与taotao-mananger-interface是独立的两个工程，因此要在taotao-manager-web工程中要添加对taotao-manager-interface的依赖，添加的内容如下：[html] view plain copy<dependency>  
        <groupId>com.taotao</groupId>  
        <artifactId>taotao-manager-interface</artifactId>  
        <version>0.0.1-SNAPSHOT</version>  
    </dependency>  
       添加后当前taotao-manager-web工程的pom.xml文件全部内容如下：[html] view plain copy<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">  
  <modelVersion>4.0.0</modelVersion>  
  <parent>  
    <groupId>com.taotao</groupId>  
    <artifactId>taotao-parent</artifactId>  
    <version>0.0.1-SNAPSHOT</version>  
  </parent>  
  <groupId>com.taotao</groupId>  
  <artifactId>taotao-manager-web</artifactId>  
  <version>0.0.1-SNAPSHOT</version>  
  <packaging>war</packaging>  
    
  <dependencies>  
    <!-- 依赖taotao-common -->  
    <dependency>  
        <groupId>com.taotao</groupId>  
        <artifactId>taotao-common</artifactId>  
        <version>0.0.1-SNAPSHOT</version>  
    </dependency>  
    <dependency>  
        <groupId>com.taotao</groupId>  
        <artifactId>taotao-manager-interface</artifactId>  
        <version>0.0.1-SNAPSHOT</version>  
    </dependency>  
    <!-- Spring -->  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-context</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-beans</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-webmvc</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jdbc</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-aspects</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-jms</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>org.springframework</groupId>  
        <artifactId>spring-context-support</artifactId>  
    </dependency>  
    <!-- JSP相关 -->  
    <dependency>  
        <groupId>jstl</groupId>  
        <artifactId>jstl</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>servlet-api</artifactId>  
        <scope>provided</scope>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>jsp-api</artifactId>  
        <scope>provided</scope>  
    </dependency>  
    <!-- dubbo相关的jar包 -->  
    <dependency>  
        <groupId>com.alibaba</groupId>  
        <artifactId>dubbo</artifactId>  
        <exclusions>  
            <exclusion>  
                <artifactId>spring</artifactId>  
                <groupId>org.springframework</groupId>  
            </exclusion>  
            <exclusion>  
                <artifactId>netty</artifactId>  
                <groupId>org.jboss.netty</groupId>  
            </exclusion>  
        </exclusions>  
    </dependency>  
    <dependency>  
        <groupId>org.apache.zookeeper</groupId>  
        <artifactId>zookeeper</artifactId>  
    </dependency>  
    <dependency>  
        <groupId>com.github.sgroschupf</groupId>  
        <artifactId>zkclient</artifactId>  
    </dependency>  
  </dependencies>  
  <build>  
    <plugins>  
        <plugin>  
            <groupId>org.apache.tomcat.maven</groupId>  
            <artifactId>tomcat7-maven-plugin</artifactId>  
            <configuration>  
                <path>/</path>  
                <port>8081</port>  
            </configuration>  
        </plugin>  
    </plugins>  
  </build>  
</project>  
        maven更新完之后，我们可以在taotao-manager-web工程所依赖的包中找到taotao-manager-interface，如下图所示。

       添加完对taotao-manager-interface的依赖后，我们便可以直接使用它了。

        如果我们使用@ResponseBody注解后访问的时候报406错误（无法把对象转换为json串），90%是可能没有引入jackson包，我们到"Maven Dependencies"下查看是否有如下图所示的三个包。

        如果没有，那么我们需要在taotao-common工程的pom.xml文件中引入jackson的依赖，由于我们的taotao-mananger-web工程依赖了taotao-common，因此它会自动依赖jackson包。现在我们的taotao-common中是依赖了jackson的，因此我们不用做任何处理。[html] view plain copy<!-- Jackson Json处理工具包 -->  
        <dependency>  
            <groupId>com.fasterxml.jackson.core</groupId>  
            <artifactId>jackson-databind</artifactId>  
        </dependency>  
       到此，我们的SSM框架整合便整合完了。
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