SpringBoot整合Dubbo配合ZooKeeper註冊中心

安裝ZooKeeper

我這裏使用zookeeper作爲服務註冊中心，版本3.4.9，下載地址：

http://mirrors.hust.edu.cn/apache/zookeeper/zookeeper-3.4.12/

下載後，解壓

要先配置一下，否則沒法啓動，啓動會報錯，找不到 zoo.cfg 文件，其實這個配置文件是有的，在 conf文件夾裏，只不過名字是 zoo_sample.cfg 把名字改一下即可

windows是啓動還有些問題，直接運行 zkServer.cmd 還不行，我電腦上還裝了 git-bash ，所以直接打開 git-bash 進入 bin 目錄，運行命令 ./zkServer.sh start 即可啓動

停止命令是 ./zkServer.sh stop

新建項目SpringBoot_dubbo_server

加入依賴：

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.tugohost</groupId>
    <artifactId>springboot_dubbo_server</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot_dubbo_server</name>
    <description>springboot_dubbo_server</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
            <version>1.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>io.dubbo.springboot</groupId>
            <artifactId>spring-boot-starter-dubbo</artifactId>
            <version>1.0.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

配置文件application.yml如下：

server:
  port: 8880

spring:
  dubbo:
    application:
      name: dubbo_server
    registry:
      address: zookeeper://127.0.0.1:2181
    protocol:
      name: dubbo
      port: 20880
    scan: com.tugohost.dubbo

定義一個Service Interface：HelloService

package com.tugohost.dubbo;

/**
 * @author: Tu9ohost
 */
public interface HelloService {
    String SayHello(String name);
}

接口的實現類：HelloServiceImpl.java：

package com.tugohost.dubbo.impl;

import com.alibaba.dubbo.config.annotation.Service;
import com.tugohost.dubbo.HelloService;

/**
 * @author: Tu9ohost
 */
@Service(version = "1.0.0")
public class HelloServiceImpl implements HelloService {
    @Override
    public String SayHello(String name) {
        return "Hello  ," + name;
    }
}

到這裏dubbo服務提供者已經創建完成。

新建項目SpringBoot_dubbo_client

加入依賴如下：

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.tugohost</groupId>
    <artifactId>springboot_dubbo_client</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot_dubbo_client</name>
    <description>springboot_dubbo_client</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
            <version>1.2.8.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>io.dubbo.springboot</groupId>
            <artifactId>spring-boot-starter-dubbo</artifactId>
            <version>1.0.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

配置文件application.yml

server:
  port: 8881

spring:
  dubbo:
    application:
      name: dubbo_client
    registry:
      address: zookeeper://127.0.0.1:2181
    scan: com.tugohost.controller

HelloService接口如下：

package com.tugohost.dubbo;

/**
 * @author: Tu9ohost
 */
public interface HelloService {
    String SayHello(String name);
}

創建一個controller進行測試

注意版本號要與提供者的版本號一致，dubbo掃描包要掃描到我們要使用的類上，代碼如下：

package com.tugohost.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.tugohost.dubbo.HelloService;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author: Tu9ohost
 */
@RestController
public class HelloController {
    @Reference(url = "dubbo://127.0.1:20880",version = "1.0.0")
    HelloService helloService;

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

到這裏dubbo服務調用者也創建完成。

測試

分別啓動服務提供者項目和服務調用者項目，在瀏覽器訪問http://localhost:8881/sayHello?name=tugohost，如圖，證明調用成功。