SpringBoot2.1.9+dubbo2.7.3+Nacos1.1.4构建你的微服务体系

简单几步使用最新版本的DUBBO构建你的微服务体系

NACOS注册中心

• 从github下载最新版本的nacos
• 上传至服务器并解压
• 单机启动sh startup.sh -m standalone
• nacos 控制台访问地址http://192.168.136.129:8848/nacos,使用账号nacos/nacos登录并访问

项目框架

本次案例包含三个组件

• 公共接口层 dubbo-api
• 生产者 dubbo-provider
• 消费者 dubbo-consumer 代码目录如下：
  

父目录

父目录主要是定义公共组件依赖，版本号，pom文件如下

1<project xmlns="http://maven.apache.org/POM/4.0.0"
2         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
3         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4    <modelVersion>4.0.0</modelVersion>
5    <packaging>pom</packaging>
6
7    <modules>
8        <module>dubbo-api</module>
9        <module>dubbo-provider</module>
10        <module>dubbo-consumer</module>
11    </modules>
12
13    <groupId>com.jianzh5</groupId>
14    <artifactId>dubbo-demo</artifactId>
15    <version>1.0-SNAPSHOT</version>
16
17
18    <properties>
19        <java.version>1.8</java.version>
20        <netty-all.version>4.0.35.Final</netty-all.version>
21        <spring-boot.version>2.1.9.RELEASE</spring-boot.version>
22        <dubbo.version>2.7.3</dubbo.version>
23        <nacos-client.version>1.1.4</nacos-client.version>
24    </properties>
25
26
27    <dependencyManagement>
28        <dependencies>
29            <!--SpringBoot-->
30            <dependency>
31                <groupId>org.springframework.boot</groupId>
32                <artifactId>spring-boot-dependencies</artifactId>
33                <version>${spring-boot.version}</version>
34                <type>pom</type>
35                <scope>import</scope>
36            </dependency>
37
38            <!-- Apache Dubbo  -->
39            <dependency>
40                <groupId>org.apache.dubbo</groupId>
41                <artifactId>dubbo-dependencies-bom</artifactId>
42                <version>${dubbo.version}</version>
43                <type>pom</type>
44                <scope>import</scope>
45            </dependency>
46
47            <!-- Dubbo Registry Nacos -->
48            <dependency>
49                <groupId>org.apache.dubbo</groupId>
50                <artifactId>dubbo-registry-nacos</artifactId>
51                <version>${dubbo.version}</version>
52            </dependency>
53
54            <dependency>
55                <groupId>com.alibaba.nacos</groupId>
56                <artifactId>nacos-client</artifactId>
57                <version>${nacos-client.version}</version>
58            </dependency>
59
60
61            <!-- Dubbo Spring Boot Starter -->
62            <dependency>
63                <groupId>org.apache.dubbo</groupId>
64                <artifactId>dubbo-spring-boot-starter</artifactId>
65                <version>${dubbo.version}</version>
66            </dependency>
67
68            <dependency>
69                <groupId>org.apache.dubbo</groupId>
70                <artifactId>dubbo</artifactId>
71                <version>${dubbo.version}</version>
72                <exclusions>
73                    <exclusion>
74                        <groupId>org.springframework</groupId>
75                        <artifactId>spring</artifactId>
76                    </exclusion>
77                    <exclusion>
78                        <groupId>javax.servlet</groupId>
79                        <artifactId>servlet-api</artifactId>
80                    </exclusion>
81                    <exclusion>
82                        <groupId>log4j</groupId>
83                        <artifactId>log4j</artifactId>
84                    </exclusion>
85                </exclusions>
86            </dependency>
87
88            <!--接口-->
89            <dependency>
90                <groupId>com.jianzh5</groupId>
91                <artifactId>dubbo-api</artifactId>
92                <version>1.0-SNAPSHOT</version>
93            </dependency>
94
95        </dependencies>
96    </dependencyManagement>
97
98
99    <build>
100        <plugins>
101            <plugin>
102                <groupId>org.springframework.boot</groupId>
103                <artifactId>spring-boot-maven-plugin</artifactId>
104                <version>${spring-boot.version}</version>
105                <executions>
106                    <execution>
107                        <goals>
108                            <goal>repackage</goal>
109                        </goals>
110                    </execution>
111                </executions>
112            </plugin>
113        </plugins>
114    </build>
115
116</project>

在pom文件中直接依赖接口，这样生产者和消费者都可以使用了

接口层dubbo-api定义

• pom

  <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"> <parent> <artifactId>dubbo-demo</artifactId> <groupId>com.jianzh5</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <groupId>com.jianzh5</groupId> <artifactId>dubbo-api</artifactId> <packaging>jar</packaging> </project>

• 定义真实的接口

  /**

  • @author jianzh5
  • @date 2019/11/5 10:45 */ public interface HelloService { String sayHello(); }

生产者dubbo-provider

• pom

  <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"> <parent> <artifactId>dubbo-demo</artifactId> <groupId>com.jianzh5</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion>

  1<groupId>com.jianzh5</groupId>
  2<artifactId>dubbo-provider</artifactId>
  3
  4<dependencies>
  5    <dependency>
  6        <groupId>org.springframework.boot</groupId>
  7        <artifactId>spring-boot-starter</artifactId>
  8    </dependency>
  9
  10    <!-- Dubbo -->
  11    <dependency>
  12        <groupId>org.apache.dubbo</groupId>
  13        <artifactId>dubbo-spring-boot-starter</artifactId>
  14    </dependency>
  15    <dependency>
  16        <groupId>org.apache.dubbo</groupId>
  17        <artifactId>dubbo</artifactId>
  18    </dependency>
  19
  20    <!-- Dubbo Registry Nacos -->
  21    <dependency>
  22        <groupId>org.apache.dubbo</groupId>
  23        <artifactId>dubbo-registry-nacos</artifactId>
  24    </dependency>
  25
  26
  27    <dependency>
  28        <groupId>com.alibaba.nacos</groupId>
  29        <artifactId>nacos-client</artifactId>
  30    </dependency>
  31
  32    <dependency>
  33        <groupId>com.jianzh5</groupId>
  34        <artifactId>dubbo-api</artifactId>
  35    </dependency>
  36</dependencies>
  37
  38<build>
  39    <plugins>
  40        <plugin>
  41            <groupId>org.springframework.boot</groupId>
  42            <artifactId>spring-boot-maven-plugin</artifactId>
  43        </plugin>
  44    </plugins>
  45</build>
  

  </project>

• 配置文件application.xml

  dubbo.application.name = dubbo-provider dubbo.registry.address = nacos://192.168.136.129:8848 dubbo.scan.base-packages=com.jianzh5.provider.service.impl dubbo.protocol.port=20881 dubbo.protocol.name=dubbo

• 接口实现

  @Service public class HelloServiceImpl implements HelloService {

  1public String sayHello() {
  2    return "欢迎关注微信公众号：JAVA日知录";
  3}
  

  }

注意这里的@service引用的是org.apache.dubbo.config.annotation.Service,不要引用错了

• 启动类

  @SpringBootApplication @EnableDubbo public class PrivoderBootstrap { public static void main(String[] args) { SpringApplication.run(PrivoderBootstrap.class, args); } }

需要引入@EnableDubbo注解

消费者dubbo-consumer

• pom

  <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"> <parent> <artifactId>dubbo-demo</artifactId> <groupId>com.jianzh5</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion>

  1<groupId>com.jianzh5</groupId>
  2<artifactId>dubbo-consumer</artifactId>
  3
  4<dependencies>
  5
  6    <dependency>
  7        <groupId>org.springframework.boot</groupId>
  8        <artifactId>spring-boot-starter</artifactId>
  9    </dependency>
  10
  11    <dependency>
  12        <groupId>org.springframework.boot</groupId>
  13        <artifactId>spring-boot-starter-web</artifactId>
  14    </dependency>
  15
  16    <!-- Dubbo -->
  17    <dependency>
  18        <groupId>org.apache.dubbo</groupId>
  19        <artifactId>dubbo-spring-boot-starter</artifactId>
  20    </dependency>
  21    <dependency>
  22        <groupId>org.apache.dubbo</groupId>
  23        <artifactId>dubbo</artifactId>
  24    </dependency>
  25
  26    <!-- Dubbo Registry Nacos -->
  27    <dependency>
  28        <groupId>org.apache.dubbo</groupId>
  29        <artifactId>dubbo-registry-nacos</artifactId>
  30    </dependency>
  31
  32
  33    <dependency>
  34        <groupId>com.alibaba.nacos</groupId>
  35        <artifactId>nacos-client</artifactId>
  36    </dependency>
  37
  38    <dependency>
  39        <groupId>com.jianzh5</groupId>
  40        <artifactId>dubbo-api</artifactId>
  41    </dependency>
  42</dependencies>
  43
  44
  45<build>
  46    <plugins>
  47        <plugin>
  48            <groupId>org.springframework.boot</groupId>
  49            <artifactId>spring-boot-maven-plugin</artifactId>
  50        </plugin>
  51    </plugins>
  52</build>
  

  </project>

• 配置文件application.properties

  spring.application.name=dubbo-consumer dubbo.registry.address = nacos://192.168.136.129:8848 server.port=9090

• 消费者HelloController

  /**

  • @author jianzh5

  • @date 2019/11/5 11:29 */ @RestController public class HelloController {

    @Reference private HelloService helloService;

    @GetMapping("/sayHello") public String sayHello(){ return helloService.sayHello(); }

  }

使用@Reference注解注入HelloService

• 接口启动类

  @SpringBootApplication public class ConsumerBootstrap {

  1public static void main(String[] args) {
  2    SpringApplication.run(ConsumerBootstrap.class, args);
  3}
  

  }

项目启动

• 启动生产者 dubbo-provider

• 启动消费者 dubbo-consumer

• 查看nacos控制台，观察是否注册

• 访问浏览器http://localhost:9090/sayHello查看接口返回

欢迎关注我的个人公众号：JAVA日知录