分布式系统架构实战demo:SSM+Dubbo

对于传统的单一构架，也就是打成的war或者ear包部署在同一个Web容器里的构架，它虽然开发、测试、部署简单，但随着业务的不断发展，维护成本增加，可扩展性差，而且一台Tomcat的并发数在500左右，系统性能存在瓶颈。虽然互联网应用的系统性能瓶颈存在于每一个地方（数据库，网络等），先不考虑其他系统瓶颈，本文采用多Tomcat来解决一个Tomcat带来的瓶颈问题，那么多个Tomcat之间如何通信？答案是Dubbo。

为什么要使用Dubbo?两台服务器A、B，分别部署不同的应用a,b。当A服务器想要调用B服务器上应用b提供的函数或方法的时候，由于不在一个内存空间，不能直接调用，需要通过网络来表达调用的语义传达调用的数据。--RPC。 Dubbo是基于RPC的高性能和透明化的RPC远程服务调用方案。

Dubbo也是一个被国内互联网公司广泛使用的SOA（核心理念：对外提供服务）基础框架，说的直白点就是：一次开发出来的服务接口，相关服务都能调用。很像Java经典的特性：一次编译，到处运行。

开发环境：

Window 7 64；Eclipse-Jee-mars-2-win32-x86_64 ；Apache-Maven-3.3.9；Spring 4.1.3；Mybatis 3.2.7；Springmvc 4.1.3；Dubbo 2.5.3，开发工具和源码：http://pan.baidu.com/s/1pLdoe0r

源码博主也上传到了'码云'上:https://gitee.com/liugh_develop/ssm_dubbo

系统构架如下：

1.配置环境,创建项目工程

配置开发环境不再这里做赘述,可以参考:Eclipse+Tomcat+MAVEN+SVN项目完整环境搭建

需要注意的是本文所用JDK是1.7,Tomcat是7.0。

1.1 mysql安装

数据库环境搭建吐血推荐，博主在踩了很多坑之后总结的高效安装方法。一分钟快速安装MySQL，超简单。

Mysql链接工具Navicat安装后，打开Navicat，新建连接-->新建数据库Mysql-->双击进入数据库-->查询-->新建查询:

SET FOREIGN_KEY_CHECKS=0;DROP TABLE IF EXISTS `book`;
CREATE TABLE `book` (`book_id` varchar(100) NOT NULL COMMENT '图书ID',`book_name` varchar(100) DEFAULT NULL COMMENT '图书名称',`number` int(11) DEFAULT NULL COMMENT '馆藏数量',PRIMARY KEY (`book_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='图书表';INSERT INTO `book` VALUES ('1000', 'Java程序设计', '10');
INSERT INTO `book` VALUES ('1001', '数据结构', '10');
INSERT INTO `book` VALUES ('1002', '设计模式', '10');
INSERT INTO `book` VALUES ('1003', '编译原理', '10');

1.3 创建父工程和子工程，目录结构如下：

其中，parent是pom文件的父工程，common是jar包，里面存放interface，bean，dao等公用内容。

controller控制层和service业务层是war包,也就是各分为一个Tomcat。

创建父工程：

创建common工程,在Packaging时选择jar:

创建controller和service的步骤和common一样,不过Packaging选择war，完成后会出现以下报错：

原因是webapp下没有WEB_INF文件夹和web.xml文件，自己创建web.xml,它内容在下文2.1中,复制粘贴即可。注意，此时的运行环境是jdk1.5，需要永久切换成jdk1.7(点buildPath切换1.7的运行环境,下回打开还是jdk1.5).所以在所有的pom文件中加入

<!-- jdk1.7 --><build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.2</version><configuration><source>1.7</source><target>1.7</target><encoding>UTF-8</encoding></configuration></plugin></plugins></build>

加入后会有以下报错,根据如下图片中步骤处理即可:

1.4 导入jar包。

parent项目pom.xml导入所有jar包的坐标，service和controller会依赖common,所以在common的pom文件中加入要引入的jar包。因为太长，此处省略源码，读者可以下载源码查看。

因为公用jar放在了common里，所以在controller和service的pom,xml文件中都加入common的依赖：

 <!-- 依赖管理 --><dependencies><dependency><groupId>com.test</groupId><artifactId>test-common</artifactId><version>0.0.1-SNAPSHOT</version></dependency></dependencies>

2.整合Spring+Mybatis

2.1 配置Spring监听器

一般会整合Spring+Mybatis放在业务逻辑层service。在service的web.xml中加入:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><!-- 上下文配置文件 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-context.xml</param-value></context-param><!-- 监听器 加载配置上下文配置文件--><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
</web-app>

2.2 创建上下文配置文件: spring-context.xml

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- 数据源  、事务 、扫描、MYbatis、ActiveMQ、Freemarker、Redis、Solr。。。。。 -->        <import resource="classpath:config/*.xml"/></beans>

2.3创建数据源和配置文件jdbc.xml:

jdbc.xml中加入读取配置文件-->数据源-->事务管理-->Spring声明式事务管理配置:

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- 读取配置文件,可以读取多个 --><bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"><list><value>classpath:jdbc.properties</value></list></property></bean><!-- 数据源  阿里巴巴出品  druid   --><bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"><property name="driverClassName" value="com.mysql.jdbc.Driver" /><property name="url" value="${jdbc.url}" /><property name="username" value="${jdbc.username}" /><property name="password" value="${jdbc.password}" /><property name="initialSize" value="${jdbc.initialSize}"></property><property name="maxActive" value="${jdbc.maxActive}"></property><property name="minIdle" value="1"></property><property name="maxWait" value="30000"></property><property name="timeBetweenEvictionRunsMillis" value="60000"></property><property name="minEvictableIdleTimeMillis" value="300000"></property><property name="validationQuery" value="SELECT 1 "></property><property name="testWhileIdle" value="true"></property><property name="poolPreparedStatements" value="true"></property><property name="maxPoolPreparedStatementPerConnectionSize" value="20"></property><property name="filters" value="stat,slf4j" /><property name="proxyFilters"><list><ref bean="stat-filter" /><ref bean="log-filter" /></list></property></bean><bean id="log-filter" class="com.alibaba.druid.filter.logging.Slf4jLogFilter"><property name="resultSetLogEnabled" value="true" /><property name="statementExecutableSqlLogEnable" value="true" /></bean><bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter"><property name="slowSqlMillis" value="30000" /><property name="logSlowSql" value="true" /><property name="mergeSql" value="true" /></bean><!-- 事务管理--><bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource" ref="dataSource"/></bean><!-- 拦截器方式配置事物,方法命名记得要规范 --><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="select*" read-only="true" propagation="REQUIRED"/><tx:method name="find*" read-only="true" propagation="REQUIRED"/><tx:method name="query*" read-only="true" propagation="REQUIRED"/><tx:method name="get*" read-only="true" propagation="REQUIRED"/><tx:method name="search*" read-only="true" propagation="REQUIRED"/><tx:method name="is*" read-only="true" propagation="REQUIRED"/><tx:method name="save*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="create*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="update*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="add*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="execute*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="remove*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="put*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="import*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="submit*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="cancel*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="send*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="edit*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="handle*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="close*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/><tx:method name="export*" propagation="REQUIRED" rollback-for="Exception,RuntimeException"/></tx:attributes></tx:advice><aop:config><aop:pointcut id="transactionPointcut"expression="execution(* com.test..*ServiceImpl.*(..))" /><aop:advisor pointcut-ref="transactionPointcut" advice-ref="txAdvice" /></aop:config>
</beans>

此处的Spring声明式事务管理配置是上一篇具体应用,有兴趣的可以深入理解下AOP: Spring AOP是什么?你都拿它做什么?

2.4 创建spring-common-context.xml自动扫描

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- 扫描 --><context:component-scan base-package="com.test.core.service"/></beans>

2.5 配置Mybatis

在config下创建mybatis.xml-->加入sqlSessionFactory 工厂-->接口的Mapper自动扫描方式:

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- sqlSessionFactory 工厂 --><bean class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 数据源 --><property name="dataSource" ref="dataSource"/><!-- 配置Mybatis核心配置文件所在位置 --><property name="configLocation" value="classpath:mybatis-config.xml"/></bean><!-- 接口   Mapper 扫描方式 自动 --><!-- MapperScannerConfigurer会自动找sqlSessionFactory,所以不用注入了.自己干预也可以 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!-- 扫描的包 --><property name="basePackage" value="com.test.core.dao"/></bean></beans>

2.6 配置mybatis-config.xml

在src/main/resources下创建,并加入如下配置:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration><!-- 别名 --><typeAliases><package name="com.test.core.bean"/></typeAliases>
</configuration>

接着创建mapper目录如下:

2.7 测试spring+mybatis.

创建JavaBean的TestBook.java:

package com.test.core.bean;import java.io.Serializable;public class TestBook implements Serializable{private static final long serialVersionUID = 1L;String bookId;String bookName;Integer number;public String getBookId() {return bookId;}public void setBookId(String bookId) {this.bookId = bookId;}public String getBookName() {return bookName;}public void setBookName(String bookName) {this.bookName = bookName;}public Integer getNumber() {return number;}public void setNumber(Integer number) {this.number = number;}@Overridepublic String toString() {return "TestBean [bookId=" + bookId + ", bookName=" + bookName + ", number=" + number + "]";}
}

Dao接口的TestBookDao:

package com.test.core.dao;import com.test.core.bean.TestBook;public interface TestBookDao {public TestBook findById(String id);
}

Mapper文件:创建包-->加入TestBookDao.xml文件:

<?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.test.core.dao.TestBookDao"><!-- 查询 --><select id="findById" resultType="TestBook" parameterType="java.lang.String">select book_id bookId,book_name bookName,number from book where book_id= #{bookId}</select></mapper>

测试:

package com.test.core.testDemo;import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.test.core.bean.TestBook;
import com.test.core.dao.TestBookDao;@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring-context.xml"})
public class TestSpringMybatis {@AutowiredTestBookDao testBookDao;@Testpublic void testFind(){TestBook findById = testBookDao.findById("1000");System.out.println(findById.toString());}
}

测试结果:

3.整合springmvc

整合SpringMVC一般放在controller层。

3.1 配置前端控制器DispatcherServlet

在子项目controller中找到web.xml文件,加入:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><!-- 前端控制器 --><servlet><servlet-name>controller</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><!-- 默认找 WEB-INF/[servlet的名称]-servlet.xml --><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc-controller.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><!-- /  :拦截所有请求 （但不包括.jsp)   .js .png .css   （配置对静态资源放行）/* :拦截所有请求   真全拦截   （基本上不用）   *.do  ： .do --><servlet-name>controller</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

3.2 配置扫描包,前端控制器,处理器映射器,处理器适配器,视图解析器

在classpath的SpringMVC-controller.xml中:

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- 扫描 @Contr -->  <context:component-scan base-package="com.test.core.controller" /><!-- 处理器 映射器  适配器 --><mvc:annotation-driven/><!-- 静态资源访问（不拦截此目录下的东西的访问） --><mvc:resources location="/WEB-INF/static/" mapping="/static/**" /><!-- 视图解释器 jsp --><bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/controller/"/><property name="suffix" value=".jsp"/></bean></beans>

3.3 加入Log日志打印

在controller和service子项目的src/main/resources中创建log4j.properties加入:

log4j.rootLogger=info, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n

3.4 测试SpringMVC

创建Tomcat:

配置service和controller的Tomcat:

注意两个Tomcat端口号不要重复,且启动时间设置长点:

创建测试的controller和jsp:

package com.test.core.controller;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;@Controller
public class TestBookController {@RequestMapping(value="/index.do")public String index(){return "index";}
}

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>hello springmvc
</body>
</html>

在这里只用启动controller的Tomcat,并在浏览器中输入:http://localhost:8080/index.do

4.整合Dubbo

搭建Zookeeper本文不在赘述,为了方便,Dubbo将设置成直接从本地查找服务.

4.1搭建Dubbo服务提供方

在test-service的config文件夹下创建dubbo-provider.xml:

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- Dubbo提供方 --><!-- 1：名称  计算机 区别 唯一 --><dubbo:application name="test-service"/><!-- 2：设置注册中心  地址  zookeeper在哪里  redis ... -->
<!--     <dubbo:registry address="192.168.0.150:2181,192.168.0.151:2181,192.168.0.152:2181" protocol="zookeeper"/> -->
<!--     <dubbo:registry address="192.168.0.150:2181" protocol="zookeeper"/> --><!-- 设置不注册 --><dubbo:registry address="N/A"/><!-- 3：dubbo://127.0.0.1:20880  默认  设置提供服务的端口号 --><dubbo:protocol port="20880" name="dubbo"/><!-- 4： 暴露实现类--><dubbo:service interface="com.test.core.service.TestBookService" ref="testBookService"/><bean id="testBookService" class="com.test.core.service.TestBookServiceImpl" />
</beans>

Service的TestBookService接口(在common工程里创建)和TestBookServiceImpl实现类(这里只写实现类):

package com.test.core.service;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import com.test.core.bean.TestBook;
import com.test.core.dao.TestBookDao;@Service("testBookService")
public class TestBookServiceImpl implements TestBookService{@AutowiredTestBookDao testBookDao;public TestBook findById(String id) {return testBookDao.findById(id);}}

4.2 搭建服务消费方

在test-service项目的springmvc-controller.xml中加入:

<import resource="dubbo-consumer.xml"/>

src/main/resources下创建dubbo-consumer.xml:

<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task"xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/taskhttp://www.springframework.org/schema/task/spring-task-4.0.xsdhttp://code.alibabatech.com/schema/dubbo        http://code.alibabatech.com/schema/dubbo/dubbo.xsd"><!-- Dubbo消费方 --><!-- 1：名称  计算机 区别 唯一 --><dubbo:application name="test-controller"/><dubbo:registry address="N/A" check="false"/><dubbo:reference interface="com.test.core.service.TestBookService" id="testBookService"url="dubbo://127.0.0.1:20880" /><!-- 全局设置 --><dubbo:consumer timeout="600000" check="false"/>
</beans>

controller内容如下:

4.3 测试完整项目

在testDubbo.jsp的body中加入:${ requestScope.book}-->启动service的Tomcat-->启动controller的tomcat(这个必须在service启动之后才能启动,注意端口号不能重复)-->浏览器中输入http://localhost:8080/testDubbo.do?id=1000

5.项目中可能会遇到的问题:

5.1 Spring注解@service无法取别名

5.2 启动Tomcat时： cannot resolve reference to bean等找不到类的报错

在parent上右键-->Run as-->Maven clean

在parent上右键-->Maven-->Update Project

5.3 Dubbo的xml文件里有红叉

ref:使用dubbo时applicationContext.xml报错解决办法

5.4 jsp文件头报错

ref:新建的web项目的jsp页面报错的解决方法