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
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-compiler-pluginartifactId>
<version>3.2version>
<configuration>
<source>1.7source>
<target>1.7target>
<encoding>UTF-8encoding>
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：
<dependencies>
<dependency>
<groupId>com.testgroupId>
<artifactId>test-commonartifactId>
<version>0.0.1-SNAPSHOTversion>
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">
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-context.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.propertiesvalue>
list>
property>
bean>
<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>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
<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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<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" ?>
<configuration>
<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;
}
@Override
public 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" ?>
<mapper namespace="com.test.core.dao.TestBookDao">
<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 {
@Autowired
TestBookDao testBookDao;
@Test
public 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">
<servlet>
<servlet-name>controllerservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:springmvc-controller.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>controllerservlet-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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<context:component-scan base-package="com.test.core.controller" />
<mvc:annotation-driven/>
<mvc:resources location="/WEB-INF/static/" mapping="/static/**" />
<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%n3.4 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"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title heretitle>
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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<dubbo:application name="test-service"/>
<dubbo:registry address="N/A"/>
<dubbo:protocol port="20880" name="dubbo"/>
<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{
@Autowired
TestBookDao 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.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task-4.0.xsd
http://code.alibabatech.com/schema/dubbo
http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
<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"
/>
<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