第一步:provider和customer中添加pom.xml完整依赖
<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.test</groupId> <artifactId>Provider</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>Provider Maven Webapp</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <!-- spring需要的jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>3.2.4.RELEASE</version> <type>jar</type> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>3.2.4.RELEASE</version> <type>jar</type> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>3.2.4.RELEASE</version> <type>jar</type> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>3.2.4.RELEASE</version> <type>jar</type> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>3.2.4.RELEASE</version> <type>jar</type> </dependency> <!-- hibernate需要的jar包 --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.1.3.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.2.16.Final</version> <type>jar</type> </dependency> <!-- hibernate ehcache需要的jar包 --> <!-- <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>4.3.8.Final</version> </dependency> --> <!-- 连接MySQL数据库需要的jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.34</version> </dependency> <!-- dbcp连接池需要的jar包 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!-- jstl需要的jar包 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log4j需要的jar包 --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <!-- 文件上传需要的jar包 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.2.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> <type>jar</type> </dependency> <dependency> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> <version>1.1.0.Final</version> </dependency> <dependency> <groupId>org.apache.ant</groupId> <artifactId>ant</artifactId> <version>1.7.0</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>Provider</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> </plugins> </build> </project>
第二步:准备provider
1.修改pom.xml
2.修改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></display-name> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> <servlet> <servlet-name>provider</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value> classpath:applicationContext.xml,classpath:applicationContext-servlet.xml </param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>provider</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <!-- 字符过滤器 --> <filter> <filter-name>Set Character Encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>Set Character Encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
3.Provider中添加服务接口
package com.zlg.test.provider; import java.util.List; /** * @Title: DemoService.java * @Package: com.zlg.test.provider * @Description: TODO * @author: zlg * @date: 2017年6月17日 下午8:17:06 * @version: V1.0 */ public interface DemoService { String sayHello(String name); public List getUsers(); }
4.Provider中添加服务接口实现类
package com.zlg.test.provider; import java.util.ArrayList; import java.util.List; import com.zlg.test.po.User; /** * @Title: DemoServiceImpl.java * @Package: com.zlg.test.provider * @Description: TODO * @author: zlg * @date: 2017年6月17日 下午8:21:26 * @version: V1.0 */ public class DemoServiceImpl implements DemoService { @Override public String sayHello(String name) { return "Hello, " + name + ". Welcome!"; } @Override @SuppressWarnings("rawtypes") public List getUsers() { List<User> users = new ArrayList<User>(3); User user1 = new User(1, "张三"); User user2 = new User(1, "李四"); User user3 = new User(1, "麻子"); users.add(user1); users.add(user2); users.add(user3); return null; } }
5.添加applicationContext.xml文件
<?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 "> <!-- 具体的实现bean --> <bean id="demoService" class="com.zlg.test.provider.DemoServiceImpl" /> <!-- 提供方应用信息,用于计算依赖关系 --> <dubbo:application name="xs_provider" /> <!-- 使用multicast广播注册中心暴露服务地址 --> <!--<dubbo:registry address="multicast://224.5.6.7:1234" /> --> <!-- 使用zookeeper注册中心暴露服务地址 --即zookeeper的所在服务器ip地址和端口号 --> <dubbo:registry address="zookeeper://192.168.0.100:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.zlg.test.provider.DemoService" ref="demoService" /> </beans>
6.添加测试类
package com.zlg.test.provider; import java.io.IOException; import org.springframework.context.support.ClassPathXmlApplicationContext; /** * @Title: TestProvider.java * @Package: com.zlg.test.provider * @Description: TODO * @author: zlg * @date: 2017年6月17日 下午8:33:58 * @version: V1.0 */ public class TestProvider { public static void main(String[] args) throws IOException { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "applicationContext.xml" }); context.start(); System.in.read(); // 为保证服务一直开着,利用输入流的阻塞来模拟 } }
ctrl+f11运行测试类
此时会报错:
错误1:通配符的匹配很全面, 但无法找到元素 ‘dubbo:application‘ 的声明。
错误2:Caused by: org.xml.sax.SAXParseException; lineNumber: 9; columnNumber: 46; cvc-complex-type.2.4.c: 通配符的匹配很全面, 但无法找到元素 ‘dubbo:application‘ 的声明
解决方法:
a.Eclipse中补充dubbo.xsd
b.pom添加依赖
<dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> <exclusions> <exclusion> <groupId>org.springframework</groupId> <artifactId>spring</artifactId> </exclusion> <!-- <exclusion> <artifactId>netty</artifactId> <groupId>org.jboss.netty</groupId> </exclusion> --> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency>
第三步:准备customer
1.修改pom.xml
2.添加applicationContext.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 "> <!-- 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 --> <dubbo:application name="Customer" /> <!-- 使用zookeeper注册中心暴露服务地址 --> <!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> --> <dubbo:registry address="zookeeper://192.168.0.100:2181" /> <!-- 生成远程服务代理,可以像使用本地bean一样使用demoService --> <dubbo:reference id="demoService" interface="com.zlg.test.provider.DemoService" /> </beans>
3.添加测试类:
package com.test.zlg.customer; import java.util.List; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.zlg.test.po.User; import com.zlg.test.provider.DemoService; /** * @Title: TestCustomer.java * @Package: com.test.zlg.customer * @Description: TODO * @author: zlg * @date: 2017年6月17日 下午9:23:51 * @version: V1.0 */ public class TestCustomer { public static void main(String[] args) throws Exception { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "applicationContext.xml" }); context.start(); DemoService demoService = (DemoService) context.getBean("demoService"); String hello = demoService.sayHello("zlg"); System.out.println(hello); List<User> list = (List<User>)demoService.getUsers(); if (list != null && list.size() > 0) { for (int i = 0; i < list.size(); i++) { System.out.println("name:" + list.get(i).getName()); } } System.in.read(); } }
第四步:联合测试(前提:将dubbo和zookeeper启动起来)
a.将provider工程加入到Tomcat容器中
b.启动tomcat,运行该项目
c.ctrl+f11运行customer工程中的TestCustomer.java文件,查看效果
补充:
a.po:user类,需要
implements Serializable
package com.zlg.test.po; import java.io.Serializable; /** * @Title: User.java * @Package: com.zlg.test.po * @Description: TODO * @author: zlg * @date: 2017年6月17日 下午8:24:03 * @version: V1.0 */ public class User implements Serializable{ /** * Fields User.java */ private static final long serialVersionUID = -2680605921068309009L; private int id; private String name; public User(int id, String name) { super(); this.id = id; this.name = name; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } }
b.customer工程需要包含DemoService类和User类
方式1:将Provider工程中的User.java和DemoService.java 打成jar包,放入到Customer工程中。
方式2:简历Maven module,抽离出common工程,将公共的Service接口和pojo放入到common工程中公用。
项目中推荐使用方式2
c.工程结构
provider:
customer:
代码在gitHub上,如果需要可以留言给地址down代码。