使用IntelliJ IDEA创建简单的Dubbo实例 - 白露~

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使用IntelliJ IDEA创建简单的Dubbo实例

这个博客是在https://blog.csdn.net/Crazer_cy/article/details/80397649篇文章上的基础上，自己学习用的。

Zookeeper为dubbo的注册中心，dubbo服务的生产者和消费者都需要在Zookeeper进行注册；
下载zookeeper压缩包并解压；
进入conf目录将 zoo_sample.cfg 改名为 zoo.cfg；
进入bin目录双击zkServer.cmd，若启动成功，则windows单机版zookeeper搭建成功
使用duboo-admin

使用IntelliJ IDEA搭建Dubbo:创建一个maven空项目，作为项目的父工程
在pom.xml添加以下公共的依赖：
1. <?xml version="1.0" encoding="UTF-8"?>
2. <project xmlns="http://maven.apache.org/POM/4.0.0"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
5. <modelVersion>4.0.0</modelVersion>
7. <groupId>com.dubbo</groupId>
8. <artifactId>dubbo_demo</artifactId>
9. <packaging>pom</packaging>
10. <version>1.0-SNAPSHOT</version>
12. <properties>
13. <motan.version>0.3.0</motan.version>
14. <dubbo.version>2.5.3</dubbo.version>
15. <dubbox.version>2.8.4</dubbox.version>
16. <spring.version>4.3.6.RELEASE</spring.version>
17. <java.version>1.8</java.version>
18. <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
19. </properties>
21. <dependencies>
22. <dependency>
23. <groupId>com.alibaba</groupId>
24. <artifactId>dubbo</artifactId>
25. <version>2.5.3</version>
26. <exclusions>
27. <exclusion>
28. <groupId>org.springframework</groupId>
29. <artifactId>spring</artifactId>
30. </exclusion>
31. </exclusions>
32. </dependency>
33. <dependency>
34. <groupId>com.github.sgroschupf</groupId>
35. <artifactId>zkclient</artifactId>
36. <version>0.1</version>
37. </dependency>
38. 
39. <dependency>
40. <groupId>org.springframework</groupId>
41. <artifactId>spring-core</artifactId>
42. <version>${spring.version}</version>
43. </dependency>
44. <dependency>
45. <groupId>org.springframework</groupId>
46. <artifactId>spring-beans</artifactId>
47. <version>${spring.version}</version>
48. </dependency>
49. <dependency>
50. <groupId>org.springframework</groupId>
51. <artifactId>spring-context</artifactId>
52. <version>${spring.version}</version>
53. </dependency>
54. <dependency>
55. <groupId>org.springframework</groupId>
56. <artifactId>spring-jdbc</artifactId>
57. <version>${spring.version}</version>
58. </dependency>
59. <dependency>
60. <groupId>org.springframework</groupId>
61. <artifactId>spring-web</artifactId>
62. <version>${spring.version}</version>
63. </dependency>
64. <dependency>
65. <groupId>org.springframework</groupId>
66. <artifactId>spring-webmvc</artifactId>
67. <version>${spring.version}</version>
68. </dependency>
69. <dependency>
70. <groupId>org.springframework</groupId>
71. <artifactId>spring-aop</artifactId>
72. <version>${spring.version}</version>
73. </dependency>
74. <dependency>
75. <groupId>org.springframework</groupId>
76. <artifactId>spring-tx</artifactId>
77. <version>${spring.version}</version>
78. </dependency>
79. <dependency>
80. <groupId>org.springframework</groupId>
81. <artifactId>spring-orm</artifactId>
82. <version>${spring.version}</version>
83. </dependency>
84. <dependency>
85. <groupId>org.springframework</groupId>
86. <artifactId>spring-context-support</artifactId>
87. <version>${spring.version}</version>
88. </dependency>
89. <dependency>
90. <groupId>org.springframework</groupId>
91. <artifactId>spring-test</artifactId>
92. <version>${spring.version}</version>
93. </dependency>
94. <dependency>
95. <groupId>org.springframework</groupId>
96. <artifactId>spring-jms</artifactId>
97. <version>${spring.version}</version>
98. </dependency>
99. <dependency>
100. <groupId>org.aspectj</groupId>
101. <artifactId>aspectjrt</artifactId>
102. <version>1.6.11</version>
103. </dependency>
104. <dependency>
105. <groupId>org.aspectj</groupId>
106. <artifactId>aspectjweaver</artifactId>
107. <version>1.6.11</version>
108. </dependency>
109. </dependencies>
111. <modules>
112. <module>dubbo_api</module>
113. <module>dubbo_consumer</module>
114. <module>dubbo_provider</module>
115. </modules>
116. </project>
在刚才创建的dubbo_demo下创建一个新的Module:dubbo_api（服务接口）
dubbo_api的pom.xml文件如下：
1. <?xml version="1.0" encoding="UTF-8"?>
2. <project xmlns="http://maven.apache.org/POM/4.0.0"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
5. <parent>
6. <artifactId>dubbo_demo</artifactId>
7. <groupId>com.dubbo</groupId>
8. <version>1.0-SNAPSHOT</version>
9. </parent>
11. <modelVersion>4.0.0</modelVersion>
13. <artifactId>dubbo_api</artifactId>
15. <packaging>jar</packaging>
17. </project>
重复3、4步骤，创建dubbo_provider（服务生产者）,对应的pom.xml文件：
1. <?xml version="1.0" encoding="UTF-8"?>
2. <project xmlns="http://maven.apache.org/POM/4.0.0"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
5. <parent>
6. <artifactId>dubbo_demo</artifactId>
7. <groupId>com.dubbo</groupId>
8. <version>1.0-SNAPSHOT</version>
9. </parent>
10. <modelVersion>4.0.0</modelVersion>
12. <artifactId>dubbo_provider</artifactId>
14. <dependencies>
15. <dependency>
16. <groupId>com.dubbo</groupId>
17. <artifactId>dubbo_api</artifactId>
18. <version>1.0-SNAPSHOT</version>
19. <scope>compile</scope>
20. </dependency>
21. </dependencies>
23. </project>
再重复3、4步骤，创建dubbo_consumer（服务消费者），对应pom.xml文件如下：
1. <?xml version="1.0" encoding="UTF-8"?>
2. <project xmlns="http://maven.apache.org/POM/4.0.0"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
5. <parent>
6. <artifactId>dubbo_demo</artifactId>
7. <groupId>com.dubbo</groupId>
8. <version>1.0-SNAPSHOT</version>
9. </parent>
10. <modelVersion>4.0.0</modelVersion>
12. <artifactId>dubbo_consumer</artifactId>
14. <dependencies>
15. <dependency>
16. <groupId>com.dubbo</groupId>
17. <artifactId>dubbo_api</artifactId>
18. <version>1.0-SNAPSHOT</version>
19. <scope>compile</scope>
20. </dependency>
21. </dependencies>
23. </project>
最后项目结构如下：
框架搭建起来之后，开始写代码和配置文件，首先是dubbo_api：需要定义服务接口：
1. package com.api.service;
3. /**
4. * 定义服务接口
5. */
6. public interface DemoService {
7. String sayHello(String name);
8. }
然后再dubbo_provider中实现上述接口（由于在pom.xml文件中，将dubbo_api作为依赖，故能引入上述接口）：
1. package com.provider.service;
3. import com.api.service.DemoService;
5. public class DemoServiceImpl implements DemoService {
6. public String sayHello(String name) {
7. return "Hello "+name;
8. }
9. }
dubbo_provider项目中的resource文件包含dubbo-provider.xml和springmvc.xml配置文件，其中dubbo-provider.xml如下：
1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
5. xsi:schemaLocation="http://www.springframework.org/schema/beans
6. http://www.springframework.org/schema/beans/spring-beans.xsd
7. http://code.alibabatech.com/schema/dubbo
8. http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
10. 
11. <dubbo:application name="dubbo_provider" />
13. 
14. <dubbo:registry address="zookeeper://127.0.0.1:2181" />
16. 
17. <dubbo:protocol name="dubbo" port="20880" />
19. 
20. <dubbo:service interface="com.api.service.DemoService" ref="demoService" />
22. 
23. <bean id="demoService" class="com.provider.service.DemoServiceImpl"/>
25. </beans>
springmvc.xml如下：
1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
3. xmlns:context="http://www.springframework.org/schema/context"
4. xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5. xsi:schemaLocation="http://www.springframework.org/schema/aop
6. http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
7. http://www.springframework.org/schema/beans
8. http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
9. http://www.springframework.org/schema/context
10. http://www.springframework.org/schema/context/spring-context-4.0.xsd
11. http://www.springframework.org/schema/util
12. http://www.springframework.org/schema/util/spring-util-4.0.xsd"
13. default-autowire="byName">
15. <aop:aspectj-autoproxy />
16. <context:component-scan base-package="com" />
17. <import resource="classpath:dubbo-provider.xml" />
18. </beans>
再在该工程下写一个测试类，后面测试用到：
1. package com.provider.test;
3. import org.springframework.context.support.ClassPathXmlApplicationContext;
5. import java.io.IOException;
7. public class ProviderTest {
8. public static void main(String[] args) {
9. ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("classpath:springmvc.xml");
10. context.start();
12. System.out.println("Dubbo provider start...");
14. try {
15. System.in.read(); // 按任意键退出
16. } catch (IOException e) {
17. e.printStackTrace();
18. }
19. }
20. }
接下来开始写消费者——dubbo_consumer的代码和配置文件：resource中的dubbo-consumer.xml:
1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
4. xsi:schemaLocation="http://www.springframework.org/schema/beans
5. http://www.springframework.org/schema/beans/spring-beans.xsd
6. http://code.alibabatech.com/schema/dubbo
7. http://code.alibabatech.com/schema/dubbo/dubbo.xsd ">
8. 
9. <dubbo:application name="dubbo_consumer" />
10. 
11. <dubbo:registry protocol="zookeeper" address="zookeeper://127.0.0.1:2181" />
12. 
13. <dubbo:reference id="demoService" interface="com.api.service.DemoService" />
14. </beans>
springmvc.xml:
1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop"
3. xmlns:context="http://www.springframework.org/schema/context"
4. xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5. xsi:schemaLocation="http://www.springframework.org/schema/aop
6. http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
7. http://www.springframework.org/schema/beans
8. http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
9. http://www.springframework.org/schema/context
10. http://www.springframework.org/schema/context/spring-context-4.0.xsd
11. http://www.springframework.org/schema/util
12. http://www.springframework.org/schema/util/spring-util-4.0.xsd"
13. default-autowire="byName">
15. <aop:aspectj-autoproxy />
16. <context:component-scan base-package="com" />
17. <import resource="classpath:/dubbo-consumer.xml" />
18. </beans>
然后写消费者的测试
1. package com.consumer;
3. import com.api.service.DemoService;
4. import org.springframework.context.support.ClassPathXmlApplicationContext;
6. import java.io.IOException;
8. public class ConsumerTest {
9. public static void main(String[] args) {
10. ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "classpath:springmvc.xml" });
12. context.start();
13. DemoService demoService = (DemoService) context.getBean("demoService");
15. System.out.println(demoService.sayHello("哈哈哈"));
16. try {
17. System.in.read();
18. } catch (IOException e) {
19. e.printStackTrace();
20. }
21. }
22. }
到现在整个代码就开发完成了，按照先后顺序，首先启动Zookeeper：zkServer.cmd 然后启动服务生产者测试类，最后启动服务消费者的测试类，当控制台输出以下结果，则代表成功。
服务生产者测试类控制台输出：
服务消费者测试了控制台输出：